Overview

SCIENTIFIC SCORE
Questionable
Based on 30 Researches
6.6
USERS' SCORE
Good
Based on 17 Reviews
8.6
Supplement Facts
Serving Size: 2 Tablets
Amount Per Serving
%DV
Vitamin D3 (as Cholecalciferol)
13 mcg (500 IU)
63%
Calcium (as Calcium Citrate)
630 mg
48%

Top Medical Research Studies

9
Vitamin D3 modulates autoimmune response
We explored how Vitamin D3 impacts autoimmune thyroiditis, a specific autoimmune disorder. In this study, researchers established a mouse model of experimental autoimmune thyroiditis (EAT) to see how Vitamin D3 could influence this condition. After eight weeks of treatment, they assessed thyroid health and immune response through various methods, including staining tissues and measuring hormone levels.

Our observations revealed that administering Vitamin D3 helped reduce damage to the thyroid and decreased the presence of inflammatory cells within the thyroid. This treatment also led to lower levels of thyroid hormones and autoimmune antibodies in the blood, highlighting its positive effect on thyroid function. Additionally, Vitamin D3 appeared to promote the regulatory T cell (Treg) subset while decreasing the levels of Th17 cells, which are often involved in autoimmune processes.

Mechanistically, the study found that Vitamin D3 triggered specific pathways that influence Treg cell activity and survival. Notably, it activated a signaling pathway involving YAP and JAK/STAT, which are crucial for immune cell regulation. These findings suggest that Vitamin D3 could play a significant role in balancing immune responses in autoimmune thyroiditis, making it a promising candidate for further research and potential treatment strategies.
Read More
9
Vitamin D3 mitigates autoimmune thyroiditis
Our research aimed to understand how vitamin D3 affects autoimmune thyroiditis, particularly in the context of Hashimoto's thyroiditis, which is characterized by low levels of vitamin D3 in patients. We induced a model of autoimmune thyroiditis in female mice and treated them with vitamin D3 to see if it could alleviate the symptoms of this condition.

After 8 weeks of treatment, we observed that vitamin D3 significantly improved the condition of the thyroid in these mice. The inflammation that commonly accompanies autoimmune thyroiditis decreased, and levels of thyroid autoantibodies, which indicate the severity of the disorder, also dropped. Notably, the application of vitamin D3 inhibited the activity of harmful immune cells while promoting the function of protective cells, providing a better balance in the immune response.

Overall, our findings suggest that vitamin D3 supplementation could be a promising strategy to manage autoimmune thyroiditis by restoring immune balance and reducing inflammation. This not only enhances our understanding of the disease but also opens up potential avenues for treatment in humans facing similar issues with autoimmune disorders.
Read More
We aimed to understand how vitamin D3, specifically its active form 1,25(OH)D, affects autoimmune hepatitis (AIH), a complex autoimmune disease that causes liver damage. Researchers focused on the role of a special type of immune cell known as dendritic cells (DCs), which are influenced by vitamin D3 to promote a more balanced immune response.

Through our investigation using a mouse model, we observed that injecting these vitamin D3-modulated dendritic cells, which overexpress a molecule called PD-L1, significantly lessened liver injury and severity of autoimmune hepatitis. This treatment appeared to correct the imbalance between two types of T cells: regulatory T cells (TFR) and follicular helper T cells (TFH).

By increasing the TFR population and restoring their balance with TFH cells, vitamin D3 treatment helped regulate this immune response. Additionally, the infusion boosted the production of anti-inflammatory substances while decreasing those linked to inflammation, suggesting a potential new avenue for treating autoimmune hepatitis. Overall, these findings indicate that vitamin D3-modulated dendritic cells could be a promising strategy for managing autoimmune conditions like AIH.
Read More

Most Useful Reviews

9.5
Normal calcium levels
21st Century Calcium Citrate + D Maximum has been effective for me. After trying various calcium supplements with minimal results, this one restored my levels to normal within three weeks. I've ordered multiple tubs as it's excellent value for money.
Read More
9.5
Stronger hair
I ordered this calcium after hearing my sister’s success with her hair growth and nail health. After using it alongside magnesium citrate, I've seen notable improvements in both my hair and nails. It’s a cost-effective solution.
Read More
8.3
Beauty maintenance
I bought this for my sister, a young nursing mother. Her doctor recommended a regimen including calcium citrate, vitamin D, EPA-DHA balance, and Lecithin for maintaining beauty and health. She's pleased with how it's positively affected her skin, hair, nails, and overall resilience during sleepless nights.
Read More

Medical Researches

SCIENTIFIC SCORE
Questionable
Based on 30 Researches
6.6
  • All Researches
9.5
Alfacalcidol outperforms plain vitamin D
We examined the effectiveness of alfacalcidol versus plain vitamin D in treating osteoporosis caused by glucocorticoid therapy. In a three-year study with patients receiving long-term glucocorticoids, we randomly assigned participants to either alfacalcidol or vitamin D3, both with calcium.

Our findings revealed that alfacalcidol significantly improved bone mineral density and reduced fracture rates compared to plain vitamin D. For instance, the alfacalcidol group experienced better increases in spine and hip bone density, and fewer new fractures overall.

Side effects were mild in both groups, affirming that alfacalcidol is more beneficial and should replace plain vitamin D as a treatment option.
Read More
9.5
We investigated how calcium, specifically in the form of two-dimensional layered calcium disilicide nanoparticles (CSNs), can play a role in treating rheumatoid arthritis (RA). Unlike typical RA treatments that primarily focus on reducing inflammation, we observed that CSNs have multifunctional properties that can address the inflammatory aspect while also promoting bone health and repair.

Through a process called hydrolysis, CSNs release several beneficial components, including hydrogen gas, calcium hydroxide, and silica. Each of these components contributes uniquely: hydrogen helps reduce harmful radicals and aids in adjusting surrounding immune cell behavior; calcium hydroxide counters the acidity that can worsen bone loss; and dissolved calcium works with phosphates to encourage bone formation.

We found that the application of CSNs had promising results in tests conducted on both mouse and rabbit models of arthritis. This approach not only targets inflammation but also fosters a healthier bone environment, showing potential as a strong therapeutic option for those living with RA. With high biocompatibility and prospects for clinical transformation, this research suggests a new direction in handling autoimmune disorders using calcium-based therapies.
Read More
9
Vitamin D3 mitigates autoimmune thyroiditis
Our research aimed to understand how vitamin D3 affects autoimmune thyroiditis, particularly in the context of Hashimoto's thyroiditis, which is characterized by low levels of vitamin D3 in patients. We induced a model of autoimmune thyroiditis in female mice and treated them with vitamin D3 to see if it could alleviate the symptoms of this condition.

After 8 weeks of treatment, we observed that vitamin D3 significantly improved the condition of the thyroid in these mice. The inflammation that commonly accompanies autoimmune thyroiditis decreased, and levels of thyroid autoantibodies, which indicate the severity of the disorder, also dropped. Notably, the application of vitamin D3 inhibited the activity of harmful immune cells while promoting the function of protective cells, providing a better balance in the immune response.

Overall, our findings suggest that vitamin D3 supplementation could be a promising strategy to manage autoimmune thyroiditis by restoring immune balance and reducing inflammation. This not only enhances our understanding of the disease but also opens up potential avenues for treatment in humans facing similar issues with autoimmune disorders.
Read More
We explored an intriguing instance of IgG4-related disease (IgG4-RD) manifesting as Mikulicz syndrome in an 85-year-old male patient. This condition usually involves significant systemic symptoms, yet our patient exhibited primarily local manifestations, specifically bilateral dacryoadenitis and orbital pseudotumor, without major organ complications.

Interestingly, despite normal serum IgG4 levels, which were below 135 mg/dL, the clinical and imaging findings strongly suggested the diagnosis of IgG4-RD. This scenario underscores the importance of undertaking a biopsy for accurate diagnosis. Histopathological examination revealed notable signs, such as a dense lymphoplasmacytic infiltrate and storiform fibrosis, with a considerable percentage of IgG4-positive cells, ultimately confirming our diagnosis.

We observed that treatment with prednisone, alongside azathioprine for long-term control, was effective. To mitigate the risk of glucocorticoid-induced osteoporosis, we added calcium and vitamin D3 supplementation. Remarkably, the patient showed significant clinical improvement within just 24 hours, with resolution of orbital and glandular symptoms over the following year. There was a complete recovery of vision and no relapses, with only minor dry eye as a long-term concern.

This case demonstrates the necessity of considering IgG4-RD even when serum IgG4 levels are normal and highlights the role of histopathology in diagnosis. Furthermore, it showcases the effectiveness of corticosteroids as a first-line treatment in managing this condition.
Read More
We examined the effects of calcitriol, an active form of vitamin D3, on mesenchymal stem cells (MSCs) in a model of rheumatoid arthritis. To do this, we induced arthritis in BALB/c mice and divided them into three groups: those without treatment, those treated with untreated MSCs, and those treated with calcitriol-exposed MSCs.

After conducting our experiments, we found that MSCs treated with calcitriol demonstrated improved regulatory functions and inhibited inflammatory responses more effectively than untreated MSCs. Specifically, we observed differences in the behavior of immune cells, with calcitriol-treated cells showing reduced levels of certain inflammatory cytokines, like INF-γ and IL-17, while increasing beneficial cytokines such as IL-4, IL-10, and TGF-β.

These findings suggest that vitamin D3 may play an important role in moderating the immune response in autoimmune conditions like rheumatoid arthritis, potentially offering a pathway for more effective treatment options.
Read More

User Reviews

USERS' SCORE
Good
Based on 17 Reviews
8.6
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9.5
Normal calcium levels
21st Century Calcium Citrate + D Maximum has been effective for me. After trying various calcium supplements with minimal results, this one restored my levels to normal within three weeks. I've ordered multiple tubs as it's excellent value for money.
Read More
9.5
Stronger hair
I ordered this calcium after hearing my sister’s success with her hair growth and nail health. After using it alongside magnesium citrate, I've seen notable improvements in both my hair and nails. It’s a cost-effective solution.
Read More
8.3
Beauty maintenance
I bought this for my sister, a young nursing mother. Her doctor recommended a regimen including calcium citrate, vitamin D, EPA-DHA balance, and Lecithin for maintaining beauty and health. She's pleased with how it's positively affected her skin, hair, nails, and overall resilience during sleepless nights.
Read More
9.5
Eczema improvement
A doctor recommended calcium with Vitamin D for my recurring eczema. After more than a month of use, my hands are clear and free from eruptions. It seems to be helping.
Read More
9.5
Nails strengthened
I struggled with brittle nails and dental issues due to a lack of calcium. This calcium citrate has significantly improved my nails and helped recover from past damage. The dissolvable form ensures easy absorption, making it a great choice.
Read More

Frequently Asked Questions

An autoimmune disorder occurs when the body's immune system mistakenly attacks its own healthy cells and tissues, believing them to be foreign invaders, such as bacteria or viruses. This reaction can lead to inflammation, tissue damage, and impaired function of the affected organs. There are over 80 known autoimmune diseases, including rheumatoid arthritis, lupus, multiple sclerosis, and type 1 diabetes, each with its own specific symptoms and treatment options. The exact cause of these disorders is still unclear, but a combination of genetic, environmental, and hormonal factors is believed to play a role in their development.

Diagnosis of autoimmune disorders often involves a combination of physical examinations, assessment of symptoms, blood tests, and imaging studies to evaluate organ involvement. Treatment typically focuses on managing symptoms and controlling the immune response using medications such as corticosteroids, immunosuppressants, and biologics. In addition to medication, lifestyle modifications, such as stress management and a balanced diet, can be beneficial in managing symptoms. If you suspect you have an autoimmune condition, it's important to consult a healthcare professional for proper evaluation and tailored treatment options.

Calcium Plus Vitamin D is a dietary supplement that combines calcium, an essential mineral vital for maintaining strong bones and teeth, with Vitamin D, a nutrient that enhances calcium absorption in the body. This combination is particularly beneficial for individuals looking to support their bone health, especially those at risk for osteoporosis or conditions that lead to decreased bone density. Calcium plays a key role in various bodily functions, including muscle contraction and nerve signaling, while Vitamin D aids in the regulation of calcium levels within the blood and helps promote overall immune function.

Many formulations of Calcium Plus Vitamin D are available in various forms, including tablets, capsules, and chewables, catering to different preferences and dietary needs. When considering adding a calcium and vitamin D supplement to your daily routine, it's essential to consult with a healthcare professional to ensure it's appropriate for your specific health requirements and to determine the right dosage. A balanced diet combined with regular sunlight exposure can also help maintain adequate calcium and vitamin D levels without the need for supplementation. However, for individuals who have limited sun exposure or have dietary restrictions, such supplements can provide a convenient and effective way to support bone health.

Based on user reviews, the timeframe for seeing results from this calcium supplement can vary, but many users report improvements within a few weeks. For instance, one reviewer indicated that they noticed a reduction in shoulder joint pain after just two weeks of use, despite having an autoimmune disorder (Read Review). Another user claimed that their leg cramps vanished within four days, showing early signs of the supplement's effectiveness (Read Review).

Additionally, some users noted more gradual improvements, with visible changes in nail health occurring after a month of consistent use (Read Review). It seems that most reviewers experienced noticeable benefits within a timeframe ranging from four days to one month, suggesting that while short-term effects can be felt quickly, longer-term use may lead to more significant changes in health and well-being.

The role of vitamin D supplementation in managing autoimmune disorders has garnered interest in recent years, with mixed results reported across various studies. For example, while a study focusing on patients with systemic lupus erythematosus found that increasing vitamin D levels was associated with a modest reduction in disease activity, the clinical significance of these improvements was limited, suggesting that higher vitamin D levels beyond a certain threshold may not yield further benefits [5]. Additionally, research examining patients with multiple sclerosis showed that despite achieving elevated vitamin D levels through supplementation, significant improvements in key clinical outcomes such as relapse rates and disability progression were not observed [26].

On the other hand, some studies indicate that vitamin D may improve immune response balance in autoimmune conditions. For instance, a study involving autoimmune thyroiditis demonstrated that vitamin D3 could decrease thyroid autoantibody levels, correlating with better management of the condition [28]. Another investigation into vitamin D's effects on autoimmune hepatitis highlighted its potential for moderating immune responses [19]. Together, these findings suggest that while vitamin D follows a promising trend in managing certain autoimmune disorders, its effectiveness is often conditional and may not universally apply across all conditions, warranting further exploration to establish clear therapeutic guidelines.

Based on user reviews, many individuals have reported various improvements in their health after using the calcium supplement, with results typically noted within a few weeks. For instance, one user shared that after three weeks of use, this calcium product restored their levels to normal, positively impacting their overall health (Read Review). Another reviewer noted visible enhancements in hair and nail health after combining the supplement with magnesium citrate, reinforcing its effectiveness (Read Review).

Users have also experienced relief from specific conditions, such as joint pain and skin issues. One user reported a complete disappearance of their leg pain due to osteoporosis within a week of starting the supplement (Read Review). Similarly, improvements in eczema were noted after over a month of usage, highlighting the supplement's potential therapeutic benefits (Read Review). While many have shared satisfying outcomes, it's important to remember that individual results may vary, and what works for one person may not work for another.

Based on user reviews, many individuals have reported positive outcomes when combining this calcium supplement with other supplements for addressing autoimmune disorders and related health concerns. For instance, one user noted that taking the supplement alongside magnesium citrate led to noticeable improvements in hair and nail health (Read Review). Another user indicated that a holistic regimen including calcium and vitamin D recommended by a healthcare professional enhanced their overall skin and hair condition (Read Review).

Users have also shared success stories related to specific conditions, such as eczema, which improved significantly after using calcium with vitamin D (Read Review). Moreover, one reviewer who suffered from fibromyalgia reported substantial relief by combining the calcium supplement with others, illustrating the effectiveness of a multi-supplement approach in managing autoimmune symptoms (Read Review). Overall, feedback suggests that pairing this calcium supplement with different nutrients can yield synergistic benefits, particularly for those facing autoimmune-related challenges.

Based on user reviews, individuals treating autoimmune disorders with Calcium Plus Vitamin D often report a need for specific dosage guidelines to maximize effectiveness. For instance, one user noted complete relief from shoulder joint pain after just two weeks of regular use, emphasizing that the simplicity of taking the supplement made it easier to integrate into daily routines, even amidst their health challenges (Read Review). Another user, who experienced improvements with symptoms linked to fibromyalgia, highlighted the collective benefit of seeking out complementary supplements alongside calcium, indicating that a tailored approach can yield positive results (Read Review).

Users also shared insights into their dosing experience. One review described a regimen involving one tablet for prophylactic purposes and two for therapeutic use, demonstrating that personalized dosing can cater to individual health needs and challenges (Read Review). While exact doses can vary, combining this supplement with proper guidance from healthcare professionals is essential for those managing autoimmune disorders. Overall, the consensus suggests that while users experienced benefits, adjustments in dosage may be crucial for optimal results and symptom relief.

9.5
Pain relief
Initially sceptical, I decided to try this calcium supplement for my shoulder joint pain, and to my surprise, it worked! After two weeks, I noticed the pain had gone despite having an autoimmune disorder. I wholeheartedly recommend it.
8.8
Cramps disappeared
After trying this calcium, I immediately ordered a larger package. Within just four days, my leg cramps vanished, and my nails are now denser and no longer peel. It's been quite effective.
9.5
Nail results
I’ve been taking this calcium regularly and have observed visible improvement in my nails; they no longer flake. The cumulative effect after a month truly shows its efficacy. Others have started ordering it after seeing my results.
9.5
Normal calcium levels
21st Century Calcium Citrate + D Maximum has been effective for me. After trying various calcium supplements with minimal results, this one restored my levels to normal within three weeks. I've ordered multiple tubs as it's excellent value for money.
9.5
Stronger hair
I ordered this calcium after hearing my sister’s success with her hair growth and nail health. After using it alongside magnesium citrate, I've seen notable improvements in both my hair and nails. It’s a cost-effective solution.
9.5
Pain reduction
Great size and good doses. My mother suffered from leg pain due to osteoporosis, which was exacerbated by walking and touch. I chose these tablets for their superior calcium absorption and the inclusion of vitamin D. After just a day, her pain diminished, and within a week, it completely vanished. Following a month of two daily tablets alongside cottage cheese, I took a break and repeated the process without further issues. This effective remedy is economical, so I stock up for my family.
9.5
Eczema improvement
A doctor recommended calcium with Vitamin D for my recurring eczema. After more than a month of use, my hands are clear and free from eruptions. It seems to be helping.
8.3
Beauty maintenance
I bought this for my sister, a young nursing mother. Her doctor recommended a regimen including calcium citrate, vitamin D, EPA-DHA balance, and Lecithin for maintaining beauty and health. She's pleased with how it's positively affected her skin, hair, nails, and overall resilience during sleepless nights.
8.8
Symptom improvement
Suffering from fibromyalgia, I learned that calcium can help bind oxalates, alleviating my symptoms. After researching, I ordered this large, reasonably priced container and noticed significant improvement. I'm combining it with other supplements from iHerb, and I'm very satisfied with the results.
8
Teeth sensitivity gone
This calcium is convenient for my family. The dosage was 1 tablet for prophylactic use and 2 for therapeutic use. After a month, my teeth sensitivity diminished significantly. I'll continue with this.
5
Modest benefits of vitamin D supplementation
We investigated whether boosting vitamin D levels in systemic lupus erythematosus (SLE) patients could improve their disease activity. Over 128 weeks, 1,006 SLE patients with low vitamin D received supplements. We observed that an increase of 20 ng/ml in vitamin D was linked to a modest drop in disease activity scores and proteinuria. While these findings were statistically meaningful, the actual clinical significance appears to be limited, and higher vitamin D levels did not show added benefit beyond 40 ng/ml.
We embarked on a study to investigate whether oral calcifediol (25-hydroxyvitamin D3) could improve clinical outcomes in patients with multiple sclerosis (MS). Our research was designed as a randomized, double-blind trial, including two groups of participants: one receiving calcifediol and the other cholecalciferol, both at a daily dosage of 50 µg.

At the conclusion of our trial, we observed a marked difference in serum vitamin D levels between the two groups. The calcifediol group achieved significantly higher concentrations of vitamin D, suggesting it is more effective in quickly raising vitamin D levels in MS patients compared to cholecalciferol.

However, we must report that despite these increased vitamin D levels, neither treatment group showed significant improvements in other important clinical measures such as MS relapses, disability progression, or overall quality of life. Both groups indeed indicated some improvements in cognitive function, but the major clinical outcomes remained largely unchanged.

Overall, our findings suggest that while calcifediol is better at increasing vitamin D levels, it did not lead to substantial improvements in the management of multiple sclerosis. Thus, further investigation may be needed to understand the broader implications of vitamin D treatment in autoimmune disorders like MS.
We delved into the relationship between vitamin D3 and autoimmune thyroiditis, particularly Hashimoto's thyroiditis (HT). This condition involves the body attacking its own thyroid tissue due to a malfunctioning immune system. Our focus was on how vitamin D3 might influence this autoimmune disorder and whether its supplementation could mitigate the disease.

Research indicates that individuals with HT often have lower levels of vitamin D compared to those without the condition. When we examined cases where patients with HT and vitamin D deficiency received vitamin D3 supplementation, we noticed a promising trend. Specifically, it was found that thyroid autoantibody titers, which are markers of immune response against the thyroid, significantly decreased in these patients following supplementation.

However, it’s important to note that while these findings are encouraging, the overall understanding of vitamin D3’s role in treating autoimmune thyroid diseases is still developing. More rigorous studies, specifically randomized, double-blind, placebo-controlled trials with longer follow-up durations, are necessary to truly grasp the benefits of vitamin D3 in this context.
We aimed to understand how vitamin D3, specifically its active form 1,25(OH)D, affects autoimmune hepatitis (AIH), a complex autoimmune disease that causes liver damage. Researchers focused on the role of a special type of immune cell known as dendritic cells (DCs), which are influenced by vitamin D3 to promote a more balanced immune response.

Through our investigation using a mouse model, we observed that injecting these vitamin D3-modulated dendritic cells, which overexpress a molecule called PD-L1, significantly lessened liver injury and severity of autoimmune hepatitis. This treatment appeared to correct the imbalance between two types of T cells: regulatory T cells (TFR) and follicular helper T cells (TFH).

By increasing the TFR population and restoring their balance with TFH cells, vitamin D3 treatment helped regulate this immune response. Additionally, the infusion boosted the production of anti-inflammatory substances while decreasing those linked to inflammation, suggesting a potential new avenue for treating autoimmune hepatitis. Overall, these findings indicate that vitamin D3-modulated dendritic cells could be a promising strategy for managing autoimmune conditions like AIH.

References

  1. Xiaowei L, Bo W, Li L, Peng Z. Comparison of the effects of valsartan plus activated vitamin D versus valsartan alone in IgA nephropathy with moderate proteinuria. Int Urol Nephrol. 2020;52:129. doi:10.1007/s11255-019-02329-5
  2. Doosti-Irani A, Tamtaji OR, Mansournia MA, Ghayour-Mobarhan M, Ferns G, et al. The effects of vitamin D supplementation on expanded disability status scale in people with multiple sclerosis: A critical, systematic review and metaanalysis of randomized controlled trials. Clin Neurol Neurosurg. 2019;187:105564. doi:10.1016/j.clineuro.2019.105564
  3. Nakamura Y, Suzuki T, Yoshida T, Yamazaki H, Kato H. Vitamin D and Calcium Are Required during Denosumab Treatment in Osteoporosis with Rheumatoid Arthritis. Nutrients. 2017;9. doi:10.3390/nu9050428
  4. Grace-Farfaglia P. Bones of contention: bone mineral density recovery in celiac disease--a systematic review. Nutrients. 2015;7:3347. doi:10.3390/nu7053347
  5. Petri M, Bello KJ, Fang H, Magder LS. Vitamin D in systemic lupus erythematosus: modest association with disease activity and the urine protein-to-creatinine ratio. Arthritis Rheum. 2013;65:1865. doi:10.1002/art.37953
  6. Kimball S, Vieth R, Dosch HM, Bar-Or A, Cheung R, et al. Cholecalciferol plus calcium suppresses abnormal PBMC reactivity in patients with multiple sclerosis. J Clin Endocrinol Metab. 2011;96:2826. doi:10.1210/jc.2011-0325
  7. Ledwich LJ, Clarke K. Screening and treatment of glucocorticoid-induced osteoporosis in rheumatoid arthritis patients in an urban multispecialty practice. J Clin Rheumatol. 2009;15:61. doi:10.1097/RHU.0b013e31819b65bd
  8. Yeap SS, Fauzi AR, Kong NC, Halim AG, Soehardy Z, et al. A comparison of calcium, calcitriol, and alendronate in corticosteroid-treated premenopausal patients with systemic lupus erythematosus. J Rheumatol. 2008;35:2344. doi:10.3899/jrheum.080634
  9. Hillman LS, Cassidy JT, Chanetsa F, Hewett JE, Higgins BJ, et al. Percent true calcium absorption, mineral metabolism, and bone mass in children with arthritis: effect of supplementation with vitamin D3 and calcium. Arthritis Rheum. 2008;58:3255. doi:10.1002/art.23809
  10. Ringe JD, Faber H, Fahramand P, Schacht E. Alfacalcidol versus plain vitamin D in the treatment of glucocorticoid/inflammation-induced osteoporosis. J Rheumatol Suppl. 2005;76:33.
  11. Frediani B, Falsetti P, Baldi F, Acciai C, Filippou G, et al. Effects of 4-year treatment with once-weekly clodronate on prevention of corticosteroid-induced bone loss and fractures in patients with arthritis: evaluation with dual-energy X-ray absorptiometry and quantitative ultrasound. Bone. 2003;33:575.
  12. Kung AW, Chan TM, Lau CS, Wong RW, Yeung SS. Osteopenia in young hypogonadal women with systemic lupus erythematosus receiving chronic steroid therapy: a randomized controlled trial comparing calcitriol and hormonal replacement therapy. Rheumatology (Oxford). 1999;38:1239.
  13. Dottori L, D'Ottavio D, Brundisini B. [Calcifediol and calcitonin in the therapy of rheumatoid arthritis. A short-term controlled study]. Minerva Med. 1982;73:3033.
  14. Vernerová L, Vokurková M, Laiferová NA, Nemec M, Špiritović M, et al. Vitamin D and its receptor in skeletal muscle are associated with muscle disease manifestation, lipid metabolism and physical fitness of patients with myositis. Arthritis Res Ther. 2025;27:48. doi:10.1186/s13075-025-03516-9
  15. Wang CM, Chen YJ, Yang BC, Yang JW, Wang W, et al. Supplementation with active vitamin D3 ameliorates experimental autoimmune thyroiditis in mice by modulating the differentiation and functionality of intrathyroidal T-cell subsets. Front Immunol. 2025;16:1528707. doi:10.3389/fimmu.2025.1528707
  16. Mendoza-Vargas LÁ, Sevilla-Fuentes S, Bautista-Becerril B, Berthaúd-González B, Falfán-Valencia R, et al. IgG4-RD-Associated Mikulicz Syndrome Without Classic Systemic Involvement-A Case Report. J Clin Med. 2025;14. doi:10.3390/jcm14030958
  17. Rafati A, Ramezani R, Esmaeili Gouvarchin Ghaleh H, Bahrami S, Alvanegh AG, et al. Calcitriol Treated Mesenchymal Stem Cells Modulated Immune Response in Collagen-Induced Rheumatoid Arthritis in BALB/c Mice. Transplant Proc. 2025;57:355. doi:10.1016/j.transproceed.2024.12.020
  18. Kilani Y, Alsakarneh S, Madi MY, Mosquera DAG, Ferreira MN, et al. Autoimmune Hepatitis and Vitamin D Deficiency: A Nationwide Perspective. Aliment Pharmacol Ther. 2025;61:682. doi:10.1111/apt.18438
  19. Dai J, Song J, Chen X, Ding F, Ding Y, et al. 1,25(OH)D-treated mouse bone marrow-derived dendritic cells alleviate autoimmune hepatitis in mice by improving TFR/TFH imbalance. Immunopharmacol Immunotoxicol. 2025;47:59. doi:10.1080/08923973.2024.2435314
  20. Wielińska J, Górna K, Świerkot J, Bugaj B, Kolossa K, et al. Polymorphic Variants in the Vitamin D Receptor and Clinical Parameters of Rheumatoid Arthritis Patients Undergoing Anti-TNF Treatment. Arch Immunol Ther Exp (Warsz). 2024;72. doi:10.2478/aite-2024-0023
  21. Yu ZQ, Du HX, Gao S, Liang CZ. Eriocalyxin B ameliorated experimental autoimmune prostatitis via modulation of macrophage polarization through gut microbiota-mediated vitamin D alteration. Phytomedicine. 2024;135:156191. doi:10.1016/j.phymed.2024.156191
  22. Fondelli F, Willemyns J, Domenech-Garcia R, Mansilla MJ, Godoy-Tena G, et al. Targeting aryl hydrocarbon receptor functionally restores tolerogenic dendritic cells derived from patients with multiple sclerosis. J Clin Invest. 2024;134. doi:10.1172/JCI178949
  23. Grove-Laugesen D, Ebbehoj E, Watt T, Hansen KW, Rejnmark L. Changes in bone density and microarchitecture following treatment of Graves' disease and the effects of vitamin D supplementation. A randomized clinical trial. Osteoporos Int. 2024;35:2153. doi:10.1007/s00198-024-07241-y
  24. Zhang Q, He X, Chen W, Jiu J, Gao C, et al. Vitamin D3 attenuates autoimmune thyroiditis by regulating Th17/Treg cell differentiation via YAP/JAK1/STAT1 axis. Immunol Lett. 2024;269:106890. doi:10.1016/j.imlet.2024.106890
  25. Rodi M, de Lastic AL, Panagoulias I, Aggeletopoulou I, Kelaidonis K, et al. Myelin Oligodendrocyte Glycoprotein (MOG)35-55 Mannan Conjugate Induces Human T-Cell Tolerance and Can Be Used as a Personalized Therapy for Multiple Sclerosis. Int J Mol Sci. 2024;25. doi:10.3390/ijms25116092
  26. Maghbooli Z, Shirvani A, Moghadasi AN, Varzandi T, Hamtaei Ghashti S, et al. Investigating the effects of 25-hydroxyvitamin D3 on clinical outcomes in multiple sclerosis patients: A randomized, double-blind clinical trial- a pilot study. Mult Scler Relat Disord. 2024;87:105673. doi:10.1016/j.msard.2024.105673
  27. Fasihi M, Samimi-Badabi M, Robat-Jazi B, Bitarafan S, Moghadasi AN, et al. Immunoregulatory Effects of the Active Form of Vitamin D (Calcitriol), Individually and in Combination with Curcumin, on Peripheral Blood Mononuclear Cells (PBMCs) of Multiple Sclerosis (MS) Patients. Antiinflamm Antiallergy Agents Med Chem. 2024;23:138. doi:10.2174/0118715230293847240314073359
  28. Durá-Travé T, Gallinas-Victoriano F. Autoimmune Thyroiditis and Vitamin D. Int J Mol Sci. 2024;25. doi:10.3390/ijms25063154
  29. Qu F, Zhang M, Weinstock-Guttman B, Zivadinov R, Qu J, et al. An ultra-sensitive and high-throughput trapping-micro-LC-MS method for quantification of circulating vitamin D metabolites and application in multiple sclerosis patients. Sci Rep. 2024;14:5545. doi:10.1038/s41598-024-55939-0
  30. Ji P, Qiu S, Huang J, Wang L, Wang Y, et al. Hydrolysis of 2D Nanosheets Reverses Rheumatoid Arthritis Through Anti-Inflammation and Osteogenesis. Adv Mater. 2025;37:e2415543. doi:10.1002/adma.202415543
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