Overview

SCIENTIFIC SCORE
Possibly Effective
Based on 13 Researches
7.4
USERS' SCORE
Good
Based on 26 Reviews
8
Supplement Facts
Serving Size: 1 MicroLingual® Tablet
Amount Per Serving
%DV
Vitamin D (as cholecalciferol)
125 mcg (5,000 IU)
625%

Top Medical Research Studies

9.5
Vitamin D3 aids autoimmune thyroiditis
We observed that vitamin D3 supplementation may play a significant role in managing autoimmune thyroiditis, a condition often marked by thyroid inflammation. In this study, researchers induced autoimmune thyroiditis in female mice and administered vitamin D3 to evaluate its effects on the disease.

After eight weeks of treatment, the results showed a notable reduction in thyroid damage and lower levels of thyroid autoantibodies in the mice receiving vitamin D3. Specifically, the vitamin appeared to inhibit the activity of certain inflammatory immune cells, which are typically elevated in autoimmune conditions. At the same time, it seemed to support the activity of regulatory immune cells that help keep inflammation in check.

This study highlights the potential of vitamin D3 as a therapeutic option to mitigate the effects of autoimmune thyroiditis, suggesting that it could help balance the immune response in affected individuals. As researchers continue to delve into the role of vitamin D in autoimmune disorders, findings like these support the notion that maintaining adequate vitamin D levels might be crucial for immune health.
Read More
8
Vitamin D aids Graves' disease therapy
We explored the connection between vitamin D levels and the management of Graves' disease, an autoimmune disorder characterized by overactive thyroid function. Through our research with 171 patients, we aimed to see if pre-treatment levels of 25-hydroxyvitamin D could influence the reduction of thyrotropin receptor antibodies (TRAB) during treatment.

Our study divided patients into three groups based on their vitamin D levels: less than 20 ng/mL, between 20-29 ng/mL, and 30 ng/mL or more. The findings were quite revealing. We observed that patients with vitamin D levels ranging from 20 to 29 ng/mL experienced significantly higher rates of TRAB remission and negative conversion compared to the other groups during follow-ups at 6, 12, and 24 months.

This suggests that maintaining vitamin D within this specific range can be beneficial for patients newly diagnosed with Graves' disease as they undergo antithyroid treatment. However, we noted that vitamin D levels did not seem to affect the normalization of free triiodothyronine and free thyroxine levels over time.

In summary, our findings emphasize the potential role of adequate vitamin D levels in supporting immune regulation and therapeutic outcomes in autoimmune disorders, particularly Graves' disease.
Read More
8
Vitamin D linked to alopecia areata
Our investigation focused on the role of vitamin D in the autoimmune disorder known as alopecia areata (AA). We delved into data from various studies, including a meta-analysis of 34 papers covering nearly 5,000 participants from multiple countries.

The findings demonstrated a clear association between low vitamin D levels and increased risk of AA. Specifically, patients with alopecia areata exhibited significantly lower serum vitamin D levels compared to healthy individuals. In fact, those with vitamin D deficiency were found to be at a higher risk of developing the condition.

These results suggest that vitamin D supplementation could potentially serve as an effective treatment strategy for individuals suffering from AA. However, it’s important to note that while vitamin D showed promise, the study did not find significant differences in other trace elements, such as copper, in relation to AA.

Overall, our research underscores the importance of maintaining adequate vitamin D levels, as it may play a crucial role in the management of autoimmune disorders like alopecia areata.
Read More

Most Useful Reviews

9
Noteworthy increase
77 people found this helpful
For vitamin D absorption, adequate fat in the diet is crucial, and many struggle with this. The sublingual form is effective as it directly enters the bloodstream. I managed to raise my D level from 30 to 46 in less than a month, which is remarkable.
Read More
9
Highly recommended
5 people found this helpful
The sublingual form of vitamin D is the best for absorption and helped me significantly. I give it to my children every 2-3 days and will continue with this effective method of supplementation.
Read More
9
Consistent results
5 people found this helpful
This vitamin D is the only one that worked for me. After months of trying other brands with modest results, I finally saw improvements in my tests after using this sublingual form. It's been a game changer for my autoimmune disorder.
Read More

Medical Researches

SCIENTIFIC SCORE
Possibly Effective
Based on 13 Researches
7.4
  • All Researches
9.5
Vitamin D3 aids autoimmune thyroiditis
We observed that vitamin D3 supplementation may play a significant role in managing autoimmune thyroiditis, a condition often marked by thyroid inflammation. In this study, researchers induced autoimmune thyroiditis in female mice and administered vitamin D3 to evaluate its effects on the disease.

After eight weeks of treatment, the results showed a notable reduction in thyroid damage and lower levels of thyroid autoantibodies in the mice receiving vitamin D3. Specifically, the vitamin appeared to inhibit the activity of certain inflammatory immune cells, which are typically elevated in autoimmune conditions. At the same time, it seemed to support the activity of regulatory immune cells that help keep inflammation in check.

This study highlights the potential of vitamin D3 as a therapeutic option to mitigate the effects of autoimmune thyroiditis, suggesting that it could help balance the immune response in affected individuals. As researchers continue to delve into the role of vitamin D in autoimmune disorders, findings like these support the notion that maintaining adequate vitamin D levels might be crucial for immune health.
Read More
8
Vitamin D aids Graves' disease therapy
We explored the connection between vitamin D levels and the management of Graves' disease, an autoimmune disorder characterized by overactive thyroid function. Through our research with 171 patients, we aimed to see if pre-treatment levels of 25-hydroxyvitamin D could influence the reduction of thyrotropin receptor antibodies (TRAB) during treatment.

Our study divided patients into three groups based on their vitamin D levels: less than 20 ng/mL, between 20-29 ng/mL, and 30 ng/mL or more. The findings were quite revealing. We observed that patients with vitamin D levels ranging from 20 to 29 ng/mL experienced significantly higher rates of TRAB remission and negative conversion compared to the other groups during follow-ups at 6, 12, and 24 months.

This suggests that maintaining vitamin D within this specific range can be beneficial for patients newly diagnosed with Graves' disease as they undergo antithyroid treatment. However, we noted that vitamin D levels did not seem to affect the normalization of free triiodothyronine and free thyroxine levels over time.

In summary, our findings emphasize the potential role of adequate vitamin D levels in supporting immune regulation and therapeutic outcomes in autoimmune disorders, particularly Graves' disease.
Read More
We investigated the effects of calcitriol, an active form of vitamin D, on mesenchymal stem cells (MSCs) in the context of rheumatoid arthritis (RA), a chronic inflammatory disease affecting joints. Using BALB/c mice, we induced RA with collagen and Freund's complete adjuvant and divided the mice into three groups: untreated, treated with untreated MSCs, and treated with calcitriol-exposed MSCs.

Our findings revealed that MSCs treated with calcitriol showcased enhanced regulatory functions, particularly regarding immune responses from splenocytes. This treatment also resulted in reduced inflammatory markers. Importantly, we observed how calcitriol modulated the production of certain cytokines, increasing levels of IL-4, IL-10, and TGF-β, while decreasing INF-γ and IL-17 compared to the positive control group.

Overall, this study highlights the potential of calcitriol treated MSCs in improving immune regulation, offering promising insights for future advanced therapies in autoimmune disorders like RA.
Read More
8
Vitamin D linked to alopecia areata
Our investigation focused on the role of vitamin D in the autoimmune disorder known as alopecia areata (AA). We delved into data from various studies, including a meta-analysis of 34 papers covering nearly 5,000 participants from multiple countries.

The findings demonstrated a clear association between low vitamin D levels and increased risk of AA. Specifically, patients with alopecia areata exhibited significantly lower serum vitamin D levels compared to healthy individuals. In fact, those with vitamin D deficiency were found to be at a higher risk of developing the condition.

These results suggest that vitamin D supplementation could potentially serve as an effective treatment strategy for individuals suffering from AA. However, it’s important to note that while vitamin D showed promise, the study did not find significant differences in other trace elements, such as copper, in relation to AA.

Overall, our research underscores the importance of maintaining adequate vitamin D levels, as it may play a crucial role in the management of autoimmune disorders like alopecia areata.
Read More
8
Vitamin D’s therapeutic potential in RA
We explored the significant role of vitamin D in managing rheumatoid arthritis (RA), a chronic autoimmune disorder characterized by joint inflammation and damage. The evidence points to a common deficiency in vitamin D among RA patients, which can be linked to increased severity of the disease.

Our observations suggest that vitamin D may help modulate the immune response and reduce inflammation. There has been promising data showing that vitamin D supplementation can lead to improvements in disease activity, as well as a decrease in inflammatory markers among patients.

In addition to its immune-boosting properties, we recognized that managing vitamin D levels might also alleviate some of the symptoms associated with RA, such as fatigue, which can be exacerbated by deficiencies. Overall, the compelling findings underline the potential benefits of vitamin D as a therapeutic option for patients dealing with autoimmune disorders like RA.
Read More

User Reviews

USERS' SCORE
Good
Based on 26 Reviews
8
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9
Noteworthy increase
77 people found this helpful
For vitamin D absorption, adequate fat in the diet is crucial, and many struggle with this. The sublingual form is effective as it directly enters the bloodstream. I managed to raise my D level from 30 to 46 in less than a month, which is remarkable.
Read More
9
Highly recommended
5 people found this helpful
The sublingual form of vitamin D is the best for absorption and helped me significantly. I give it to my children every 2-3 days and will continue with this effective method of supplementation.
Read More
9
Consistent results
5 people found this helpful
This vitamin D is the only one that worked for me. After months of trying other brands with modest results, I finally saw improvements in my tests after using this sublingual form. It's been a game changer for my autoimmune disorder.
Read More
9
Effective solution
2 people found this helpful
After trying different vitamin D3 products with no results, I was advised to try this particular one and saw significant improvements after one month. I plan to order more since winter is approaching, and sunlight is limited.
Read More
9
Easy to consume
1 people found this helpful
I regularly purchase this product due to its high content and ease of consumption. After trying an injection for my anxiety, I now feel much better with this supplement as my go-to vitamin D source. It's become my favourite.
Read More

Frequently Asked Questions

9
Noteworthy increase
77 people found this helpful
For vitamin D absorption, adequate fat in the diet is crucial, and many struggle with this. The sublingual form is effective as it directly enters the bloodstream. I managed to raise my D level from 30 to 46 in less than a month, which is remarkable.
9
Effective solution
2 people found this helpful
After trying different vitamin D3 products with no results, I was advised to try this particular one and saw significant improvements after one month. I plan to order more since winter is approaching, and sunlight is limited.
7.5
Effective treatment
218 people found this helpful
I consumed for six months, and according to my tests, my vitamin D levels rose from 17 to 90, the upper limit of normal. If you have an autoimmune disorder, this form is effective and convenient to take, with a pleasant taste. The benefits are undeniable.
9
Quick recovery
3 people found this helpful
I took one pack of tablets due to a severe deficiency, raising my levels from 7 to 42. This is a fantastic outcome in such a short time, and I will continue with a lower dosage moving forward.
2
No benefits observed
Although a family member with an autoimmune disorder took it under the tongue, he felt no benefit, consuming only two bottles before deciding not to purchase it again.
7.5
Enhanced health benefits
6 people found this helpful
I'm ordering for the second time. Vitamin D regulates calcium and phosphorus absorption and protects the body from various ailments. I noticed significant improvements and recommend taking it with calcium and fish oil.
9
Effective absorption
Excellent! This is the best vitamin D ever. It dissolves instantly under the tongue, ensuring efficient absorption. After taking 10,000 IU for a week, my vitamin D levels increased to 70 out of 100, which is a good result. I also take an oil-based supplement for prevention. Regular testing is essential to adjust the dosage.
9
Boosted immunity
1 people found this helpful
Studies show immense risks with vitamin D deficiency, with many chronic illnesses linked to low levels. I began taking 10,000 IU daily after my level was 15 ng/ml, raising to 80 ng/ml in six months. This form minimises gastrointestinal irritation, helping immensely.
7.5
Maintained vitamin D levels
1 people found this helpful
I raised my vitamin D from 30 to 80 with a 10,000 IU dosage in two months. I've now reduced my dosage to maintain the level. I consistently take it for my autoimmune disorder.
9
Significant improvement
177 people found this helpful
It greatly elevates vitamin D levels in the blood. Even for those with gastrointestinal issues, it absorbs efficiently in the mouth. I ordered it for myself and my child, raising vitamin D from 27 to 64 in three months.
We explored the connection between vitamin D levels and muscle health in patients with idiopathic inflammatory myopathies (IIM), a type of autoimmune disorder. The study included 46 IIM patients and 67 healthy individuals, assessing both groups to understand how vitamin D and its receptor (VDR) relate to disease symptoms, physical fitness, and lipid metabolism.

Through muscle biopsies and blood tests, we measured the vitamin D levels and gene expressions related to its metabolism. We found that lower levels of biologically active vitamin D in IIM patients suggest their bodies may not be effectively processing this vital nutrient. Moreover, regular exercise seemed to improve vitamin D levels, VDR expression, and linked muscle function with overall health outcomes for these patients.

Our findings emphasize the importance of vitamin D in managing muscle health and its potential role in enhancing physical fitness among individuals with autoimmune conditions. While the study presents promising insights, it is clear that ongoing research is needed to fully understand the relationship between vitamin D, muscle function, and autoimmune disorders.
9.5
Vitamin D3 aids autoimmune thyroiditis
We observed that vitamin D3 supplementation may play a significant role in managing autoimmune thyroiditis, a condition often marked by thyroid inflammation. In this study, researchers induced autoimmune thyroiditis in female mice and administered vitamin D3 to evaluate its effects on the disease.

After eight weeks of treatment, the results showed a notable reduction in thyroid damage and lower levels of thyroid autoantibodies in the mice receiving vitamin D3. Specifically, the vitamin appeared to inhibit the activity of certain inflammatory immune cells, which are typically elevated in autoimmune conditions. At the same time, it seemed to support the activity of regulatory immune cells that help keep inflammation in check.

This study highlights the potential of vitamin D3 as a therapeutic option to mitigate the effects of autoimmune thyroiditis, suggesting that it could help balance the immune response in affected individuals. As researchers continue to delve into the role of vitamin D in autoimmune disorders, findings like these support the notion that maintaining adequate vitamin D levels might be crucial for immune health.
8
Vitamin D aids Graves' disease therapy
We explored the connection between vitamin D levels and the management of Graves' disease, an autoimmune disorder characterized by overactive thyroid function. Through our research with 171 patients, we aimed to see if pre-treatment levels of 25-hydroxyvitamin D could influence the reduction of thyrotropin receptor antibodies (TRAB) during treatment.

Our study divided patients into three groups based on their vitamin D levels: less than 20 ng/mL, between 20-29 ng/mL, and 30 ng/mL or more. The findings were quite revealing. We observed that patients with vitamin D levels ranging from 20 to 29 ng/mL experienced significantly higher rates of TRAB remission and negative conversion compared to the other groups during follow-ups at 6, 12, and 24 months.

This suggests that maintaining vitamin D within this specific range can be beneficial for patients newly diagnosed with Graves' disease as they undergo antithyroid treatment. However, we noted that vitamin D levels did not seem to affect the normalization of free triiodothyronine and free thyroxine levels over time.

In summary, our findings emphasize the potential role of adequate vitamin D levels in supporting immune regulation and therapeutic outcomes in autoimmune disorders, particularly Graves' disease.
8
Vitamin D’s therapeutic potential in RA
We explored the significant role of vitamin D in managing rheumatoid arthritis (RA), a chronic autoimmune disorder characterized by joint inflammation and damage. The evidence points to a common deficiency in vitamin D among RA patients, which can be linked to increased severity of the disease.

Our observations suggest that vitamin D may help modulate the immune response and reduce inflammation. There has been promising data showing that vitamin D supplementation can lead to improvements in disease activity, as well as a decrease in inflammatory markers among patients.

In addition to its immune-boosting properties, we recognized that managing vitamin D levels might also alleviate some of the symptoms associated with RA, such as fatigue, which can be exacerbated by deficiencies. Overall, the compelling findings underline the potential benefits of vitamin D as a therapeutic option for patients dealing with autoimmune disorders like RA.
We set out to discover how effective vitamin D is in treating autoimmune disorders, specifically in patients with Hashimoto's thyroiditis (HT). Our analysis involved looking at several studies examining various dietary supplements, including selenium and vitamin D, to see how they impact thyroid autoantibody levels and overall thyroid function.

Within the studies we reviewed, vitamin D did not seem to significantly reduce thyroid autoantibody levels like other supplements. In particular, we noted that treatments involving vitamin D, whether alone or in combination with other nutrients, did not show a meaningful effect on reducing thyroid peroxidase autoantibodies (TPOAb) or thyroglobulin autoantibodies (TgAb).

This lack of significant benefit suggests that while vitamin D is often included in treatment plans for autoimmune disorders, it may not play a critical role in alleviating the symptoms or autoimmunity associated with HT. Therefore, it might be wise for those seeking supplemental help to consider other options, particularly selenium, which showed more promising results.

References

  1. 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. 10.1186/s13075-025-03516-9
  2. 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. 10.3389/fimmu.2025.1528707
  3. Chen X, Zhang Y, Lin L, Chen Y, Shen X, et al. A beneficial levels of 25-hydroxyvitamin D for a decrease in thyrotropin receptor antibody (TRAB) in patients with Graves' disease: a real-world study. BMC Endocr Disord. 2025;25:14. 10.1186/s12902-024-01823-x
  4. 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. 10.1016/j.transproceed.2024.12.020
  5. Casas R, Tompa A, Åkesson K, Teixeira PF, Lindqvist A, et al. Redosing with Intralymphatic GAD-Alum in the Treatment of Type 1 Diabetes: The DIAGNODE-B Pilot Trial. Int J Mol Sci. 2025;26. 10.3390/ijms26010374
  6. Rasheed A, Khan G. Epstein-Barr virus, vitamin D and the immune response: connections with consequences for multiple sclerosis. Front Immunol. 2024;15:1503808. 10.3389/fimmu.2024.1503808
  7. Wu R, Li Y, Peng H, Yang Z, Wang Y, et al. Association Between Serum Trace Elements Level and Alopecia Areata: A Systematic Review and Meta-Analysis. J Cosmet Dermatol. 2025;24:e16740. 10.1111/jocd.16740
  8. Hijjawi N, Tout FS, Azaizeh B, Aljaafreh B. The role of vitamins D, B12, C, and K in modulating inflammation and disease management in rheumatoid arthritis: a comprehensive review. Clin Rheumatol. 2025;44:591. 10.1007/s10067-024-07285-9
  9. Peng B, Wang W, Gu Q, Wang P, Teng W, et al. Effects of different supplements on Hashimoto's thyroiditis: a systematic review and network meta-analysis. Front Endocrinol (Lausanne). 2024;15:1445878. 10.3389/fendo.2024.1445878
  10. Balshi A, Leuenberger G, Dempsey J, Baber U, Sloane JA. Glucagon-like peptide-1 agonist safety and efficacy in a multiple sclerosis cohort. Mult Scler Relat Disord. 2025;93:106229. 10.1016/j.msard.2024.106229
  11. Mourelatou NG, Kounatidis D, Jude EB, Rebelos E. Vitamin D Supplementation as a Therapeutic Strategy in Autoimmune Diabetes: Insights and Implications for LADA Management. Nutrients. 2024;16. 10.3390/nu16234072
  12. Huo R, Yang Y, Wei C, Huo X, Meng D, et al. Vitamin D affects antiphospholipid syndrome by regulating T cells (Review). Int J Mol Med. 2025;55. 10.3892/ijmm.2024.5471
  13. 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. 10.1111/apt.18438
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