Effect of Vitamin D Supplementation on Tibial Cartilage Volume and Knee Pain Among Patients With Symptomatic Knee Osteoarthritis: A Randomized Clinical Trial.
We conducted a thorough investigation into the effects of vitamin D3 supplementation on knee pain and cartilage volume in people suffering from knee osteoarthritis, particularly those with low vitamin D levels. This study took place in Tasmania and Victoria, Australia, and was designed as a multicenter, randomized, double-blind, placebo-controlled clinical trial.
Over a span of two years, we divided participants into two groups: one received a monthly dose of oral vitamin D3 (50,000 IU), while the other group received a placebo. Our main focus was to evaluate any changes in tibial cartilage volume, measured through MRI, as well as the participants' knee pain levels as indicated by the Western Ontario and McMaster Universities Arthritis Index (WOMAC) pain score.
The results showed that, compared to the placebo group, those who received vitamin D3 experienced no significant differences in either tibial cartilage volume or reported knee pain over the two years. This indicates that vitamin D3 supplementation does not provide meaningful benefits for reducing tibial cartilage loss or improving knee pain in patients with symptomatic knee osteoarthritis.
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1
Vitamin D3 ineffective for knee pain
Effect of vitamin D supplementation on progression of knee pain and cartilage volume loss in patients with symptomatic osteoarthritis: a randomized controlled trial.
We conducted a thorough investigation into whether vitamin D3 supplementation could alleviate knee pain in individuals with osteoarthritis. Our study involved 146 participants, all experiencing symptomatic knee osteoarthritis. They were either given a placebo or oral doses of vitamin D3, specifically aimed at achieving serum levels greater than 36 ng/mL over two years.
The main focus was on evaluating changes in knee pain and cartilage loss, utilizing the Western Ontario and McMaster Universities (WOMAC) pain scale for symptoms and magnetic resonance imaging for cartilage assessment. Unfortunately, our findings revealed that vitamin D supplementation did not lead to any significant reduction in knee pain or cartilage loss when compared to the placebo.
While we were hopeful that vitamin D3 might provide some relief, the results clearly indicated that this approach did not yield the desired effects in patients suffering from knee osteoarthritis. This outcome is crucial as it helps to shape future treatment approaches for this common condition.
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9
Vitamin D3 reduces knee OA pain
The influence of vitamin D supplementation on the expression of mediators of inflammation in knee osteoarthritis.
We aimed to understand the therapeutic impact of vitamin D3 on knee pain associated with osteoarthritis (OA). In a 3-month open-label clinical trial, we observed 80 patients with knee OA who took an oral supplement of vitamin D3 at a dosage of 4000 IU per day.
Over the course of the study, we measured the participants' pain levels and functionality using WOMAC subscores and Visual Analog Scale (VAS) assessments. Excitingly, we found that the average pain intensity decreased significantly after treatment. In fact, about 87% of the participants showed a notable positive response to the vitamin D3 supplementation.
Alongside improvements in pain, we also noted changes in certain inflammation markers in the blood. There was a significant decrease in pro-inflammatory cytokines like TNF-α and IL-17, while levels of IL-33 increased. This suggests that vitamin D3 might play a role in modulating the inflammatory processes related to knee OA.
Ultimately, our findings highlight the potential of vitamin D3 supplementation as a promising therapeutic option for managing knee OA symptoms. Further research is warranted to delve deeper into the role of IL-33 and its implications for osteoarthritis.
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Most Useful Reviews
9
Remarkable improvement
12 people found this helpful
I cannot express how much I have benefited from this excellent product over two years. I searched for this formula of vitamin D, K2, and iodine and found it here. Since then, everything has improved greatly—my health, my sleep, my energy, and notably, my knees and bones. I wish I could give it more than a thousand stars as it has become essential in my life.
Read More
10
Injury recovery
Prescribed after a severe knee injury, this vitamin complex, alongside collagen and calcium, has greatly reduced my knee pain. Recommended for use twice a year.
Read More
9
Softens knees
1 people found this helpful
It aids in making my knees soft and improves the ease of bending.
We aimed to understand the therapeutic impact of vitamin D3 on knee pain associated with osteoarthritis (OA). In a 3-month open-label clinical trial, we observed 80 patients with knee OA who took an oral supplement of vitamin D3 at a dosage of 4000 IU per day.
Over the course of the study, we measured the participants' pain levels and functionality using WOMAC subscores and Visual Analog Scale (VAS) assessments. Excitingly, we found that the average pain intensity decreased significantly after treatment. In fact, about 87% of the participants showed a notable positive response to the vitamin D3 supplementation.
Alongside improvements in pain, we also noted changes in certain inflammation markers in the blood. There was a significant decrease in pro-inflammatory cytokines like TNF-α and IL-17, while levels of IL-33 increased. This suggests that vitamin D3 might play a role in modulating the inflammatory processes related to knee OA.
Ultimately, our findings highlight the potential of vitamin D3 supplementation as a promising therapeutic option for managing knee OA symptoms. Further research is warranted to delve deeper into the role of IL-33 and its implications for osteoarthritis.
Read More
9
Vitamin D3 aids post-surgery recovery
Vitamin D Trajectory after Total Knee Arthroplasty: A Method for Quick Correction in Deficient Patients.
We explored the effects of vitamin D (D3) on knee pain recovery after total knee arthroplasty (TKA). In our study, we enrolled 60 patients and categorized them into three groups based on their vitamin D levels. Some patients had sufficient vitamin D, while others were either given large doses of oral or intramuscular supplementation if they were found to be insufficient.
Our findings revealed that patients with insufficient vitamin D experienced significant improvements in their knee function after receiving large oral doses. In fact, those who received oral supplements showed recovery comparable to patients who already had sufficient vitamin D. Conversely, while intramuscular supplementation did increase vitamin D levels, it was less effective compared to the oral method and only showed noticeable improvement by the two-week mark.
Interestingly, we also noted that about 25% of patients who initially had sufficient vitamin D levels became insufficient within the first two weeks post-surgery. This indicates that even those with adequate levels may need to consider supplementation after undergoing TKA to maintain optimal recovery.
In summary, our study suggests that quickly addressing vitamin D deficiency with oral supplementation can play a crucial role in enhancing recovery and reducing knee pain following TKA.
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9
Vitamin D3 alleviates knee pain
Restorative Effect of Vitamin D Deficiency on Knee Pain and Quadriceps Muscle Strength in Knee Osteoarthritis.
We aimed to understand how vitamin D3 supplementation influences knee pain and muscle strength in individuals suffering from knee osteoarthritis (KOA). The study involved 67 patients over the age of 30, all experiencing knee pain for at least a month and showing signs of vitamin D deficiency.
Participants received a weekly dose of 50,000 IU of oral cholecalciferol (vitamin D3) for a span of two months. By the end of the treatment, nearly all participants had sufficient levels of vitamin D. Significant improvements were observed; serum vitamin D levels rose, quadriceps muscle strength increased, and knee pain decreased for the majority of participants.
Specifically, the pain reduction was measurable through standard pain assessment methods. The findings suggest a clear link between correcting vitamin D deficiency and improvements in both muscle strength and pain levels for those living with KOA.
Read More
9
Case study of knee pain relief
Adult Fanconi syndrome with proximal muscle weakness and hypophosphatemic osteomalacia: report of a case.
We examined the impact of vitamin D3 in a patient suffering from adult Fanconi syndrome, who experienced notable knee pain among other symptoms. This individual, a 42-year-old female, presented with various issues including progressive proximal muscle weakness and marked bone discomfort, particularly in the knees. After a thorough evaluation that included electromyography and a muscle biopsy, she was diagnosed with this rare condition, which often results in deficiencies that can lead to significant pain and discomfort.
Following a comprehensive treatment plan, which included tricalcium phosphate, vitamin D3, and sodium bicarbonate, we observed positive changes in her symptoms. The patient's knee pain, along with other discomforts, notably improved after a six-week supplementation regimen. However, it's essential to clarify that while vitamin D3 was part of a combined treatment, the specific contribution of vitamin D3 to alleviating knee pain is hard to isolate. We conclude that vitamin D3 may offer some benefits when included in a broader treatment framework, but further research would be needed to fully understand its role in managing knee pain specifically.
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8
Vitamin D3 aids post-operative pain
Role of Pre-operative Correction of Vitamin D3 Deficiency in Controlling Post-operative Bone Pain after Unicompartmental Knee Arthroplasty.
We investigated the role of Vitamin D3 in managing post-operative knee pain after unicompartmental knee arthroplasty (UKA). Our study involved 240 patients divided into three groups based on their Vitamin D3 levels. One group had their deficiency corrected before surgery, another received treatment after the operation, and the last group had normal levels from the start.
We aimed to determine not only how Vitamin D3 levels affected post-operative pain but also the benefits of correcting any deficiencies pre-operatively. Our findings revealed that correcting Vitamin D3 levels before surgery significantly improved pain management for patients. Those who were treated pre-operatively experienced better control of post-operative pain compared to those whose deficiencies were addressed afterwards.
In summary, we found that Vitamin D3 is an essential component in pre-operative assessments for patients undergoing UKA. Addressing any deficiencies beforehand seems to lead to improved outcomes in pain relief, highlighting its importance as a modifiable risk factor in surgical recovery.
I cannot express how much I have benefited from this excellent product over two years. I searched for this formula of vitamin D, K2, and iodine and found it here. Since then, everything has improved greatly—my health, my sleep, my energy, and notably, my knees and bones. I wish I could give it more than a thousand stars as it has become essential in my life.
Read More
10
Injury recovery
Prescribed after a severe knee injury, this vitamin complex, alongside collagen and calcium, has greatly reduced my knee pain. Recommended for use twice a year.
Read More
9
Softens knees
1 people found this helpful
It aids in making my knees soft and improves the ease of bending.
Read More
7.5
Pain reduction
The composition effectively prevents blood vessels from clogging and promotes calcium absorption, alongside benefits for the thyroid gland. There’s a noticeable improvement in my leg pain.
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6
Crackling reduction
I’ve been taking this for three months due to crackling knees. While it hasn't completely stopped, the condition has significantly improved.
Read More
Frequently Asked Questions
Knee pain is a common condition that can result from various causes, including injuries, overuse, and underlying medical conditions such as arthritis. The knee joint is a complex structure composed of bones, ligaments, tendons, and cartilage, all of which work together to enable movement and support body weight. When any of these components are damaged or inflamed, it can lead to discomfort, stiffness, swelling, and reduced mobility in the affected area.
In many cases, knee pain can manifest as acute pain following an injury, such as a tear in a ligament or cartilage damage. Alternatively, it may develop gradually due to factors like repetitive strain, age-related degeneration, or conditions like osteoarthritis and rheumatoid arthritis. Treatment options vary widely and may include rest, physical therapy, medication, or, in severe cases, surgical interventions. If you're experiencing persistent knee pain, it's advisable to consult with a healthcare professional for an accurate diagnosis and tailored treatment plan.
Vitamin D3 K2 is a supplement that combines two vital nutrients: vitamin D3 (cholecalciferol) and vitamin K2 (menaquinone). Vitamin D3 is crucial for maintaining healthy bones and immune function, as it helps the body absorb calcium, which is essential for bone strength. It can be obtained through sunlight exposure, certain foods, and supplements. On the other hand, vitamin K2 plays a significant role in directing calcium to the bones and teeth while preventing it from depositing in the arteries and soft tissues, thus promoting cardiovascular health and overall well-being.
The synergy between vitamin D3 and K2 is particularly important because they work together to ensure that calcium is utilized effectively in the body. While vitamin D3 boosts calcium absorption, vitamin K2 ensures that this calcium is deposited properly in the bones rather than accumulating in the arteries. This combination is believed to support bone density, cardiovascular health, and overall vitality. Many health professionals recommend considering a D3 and K2 supplement, especially for individuals who may be at risk of deficiency or those who live in areas with limited sunlight exposure. Always consult a healthcare provider before starting any new supplement regimen.
Vitamin D3 and K2 are often discussed in the context of bone health and overall well-being, but their direct impact on knee pain is not as straightforward. Vitamin D3 is known to play a critical role in calcium absorption and bone health, which may indirectly contribute to reducing discomfort associated with joint pain in some individuals, particularly those with deficiencies. K2 complements Vitamin D3 by helping to direct calcium to the bones rather than allowing it to deposit in the arteries, supporting a healthier skeletal structure.
However, while some studies suggest that these vitamins can improve musculoskeletal health, they should not be seen as a primary treatment for knee pain. The underlying cause of knee pain—whether it's arthritis, injury, or another condition—needs to be addressed specifically. It’s essential to consult with a healthcare professional before starting any supplementation, particularly if you're already managing pain with other treatments. They can help determine the appropriateness of Vitamin D3 and K2 for your unique situation and overall health strategy.
Based on user reviews, the time it takes to see results from this supplement for knee pain can vary significantly. Many users report noticing improvements within a few months of consistent use. For example, one user mentioned experiencing significant improvements after three months of taking the supplement, despite some ongoing crackling in the knees Read Review. Another user noted that the supplement, in conjunction with other vitamins, greatly reduced their knee pain over the course of their usage Read Review.
Moreover, some users suggest that the supplement may provide benefits that accumulate over time, as reflected in a two-year user who felt improved overall health, including notable benefits for their knees Read Review. It's clear that while some experience relatively quick improvements, others may find that ongoing use leads to more pronounced changes in their knee pain and overall joint comfort.
Vitamin D3 is emerging as a potential player in the management of knee pain, particularly for conditions like osteoarthritis. Several studies have explored its benefits, and findings suggest that vitamin D3 supplementation can lead to significant improvements in pain relief. For instance, in a clinical trial involving patients with knee osteoarthritis, those who took 4000 IU of vitamin D3 daily reported a notable decrease in pain levels, with approximately 87% showing positive responses after treatment [3]. Moreover, another analysis of randomized controlled trials encompassing over 1,100 participants affirmed that vitamin D3 can significantly reduce pain for those suffering from knee osteoarthritis [7].
However, it's important to frame these results within the broader context. While research indicates that vitamin D3 can improve knee pain and function, it does not appear to prevent cartilage loss in the knee joints [7]. The efficacy of vitamin D3 can also be influenced by existing deficiencies, as correcting these levels through supplementation has been associated with improved pain management post-surgery [1]. Nevertheless, not all studies have pointed to strong conclusions; some have found minimal or no significant impact on knee pain [9], suggesting that while vitamin D3 may help in certain scenarios, it might not be a standalone solution for everyone. As always, more research is needed to fully clarify its role.
Users report a range of symptom improvements after incorporating this vitamin supplement into their routines. Many have highlighted significant benefits in joint health, particularly for knee-related issues. For instance, one user noted that after two years of consistent use, their overall health, sleep, energy, and knee function had drastically improved, expressing a strong dependence on the product for continued well-being Read Review. Another user, recovering from a severe knee injury, experienced substantial reductions in knee pain when combining the supplement with collagen and calcium Read Review.
Additionally, several users have mentioned specific improvements in the ease of movement and reduction in leg pain. One user articulated that the supplement helped in making their knees feel softer and easier to bend Read Review. Moreover, another found that, even with ongoing crackling in their knees, there was a noticeable enhancement in symptoms after just three months Read Review. Overall, while results can vary depending on individual circumstances, many users have reported positive changes that contribute to improved mobility and quality of life.
Users report positive experiences when combining this supplement with other products for knee pain management. One user specifically mentioned that after a severe knee injury, they found significant relief by using this vitamin complex alongside collagen and calcium Read Review. This combination was noted to greatly reduce knee pain, illustrating the potential benefits of using this supplement in conjunction with others aimed at joint health.
Additionally, users have observed improvements in knee mobility and comfort when integrating this supplement into their routine. For instance, one reviewer shared that the supplement aids in making their knees feel softer and improves the ease of bending Read Review. The cumulative effects of these combinations can lead to enhanced movement and reduced discomfort, ultimately contributing to a better quality of life for those managing knee pain.
While the optimal dosage of Vitamin D3 for treating knee pain can vary based on individual circumstances, research provides some compelling insights. A clinical trial assessing vitamin D3's effectiveness for knee osteoarthritis found that a daily dosage of 4000 IU over three months led to significant reductions in pain for approximately 87% of participants [3]. In contrast, a comprehensive analysis of four studies suggested that higher doses, specifically over 2000 IU daily, were most effective in alleviating knee pain and improving functionality without increasing adverse effects compared to placebo groups [7].
Additionally, even short-term high-dose regimens, such as administering 50,000 IU weekly, have shown positive effects, where most participants reported a decrease in knee pain following two months of treatment [10]. Overall, a personalized approach and consultation with a healthcare provider are recommended to determine the most suitable dosage for individual conditions, considering the variations in response to Vitamin D3 supplementation.
6
Crackling reduction
I’ve been taking this for three months due to crackling knees. While it hasn't completely stopped, the condition has significantly improved.
10
Injury recovery
Prescribed after a severe knee injury, this vitamin complex, alongside collagen and calcium, has greatly reduced my knee pain. Recommended for use twice a year.
9
Remarkable improvement
12 people found this helpful
I cannot express how much I have benefited from this excellent product over two years. I searched for this formula of vitamin D, K2, and iodine and found it here. Since then, everything has improved greatly—my health, my sleep, my energy, and notably, my knees and bones. I wish I could give it more than a thousand stars as it has become essential in my life.
9
Softens knees
1 people found this helpful
It aids in making my knees soft and improves the ease of bending.
9
Vitamin D3 reduces knee OA pain
The influence of vitamin D supplementation on the expression of mediators of inflammation in knee osteoarthritis.
We aimed to understand the therapeutic impact of vitamin D3 on knee pain associated with osteoarthritis (OA). In a 3-month open-label clinical trial, we observed 80 patients with knee OA who took an oral supplement of vitamin D3 at a dosage of 4000 IU per day.
Over the course of the study, we measured the participants' pain levels and functionality using WOMAC subscores and Visual Analog Scale (VAS) assessments. Excitingly, we found that the average pain intensity decreased significantly after treatment. In fact, about 87% of the participants showed a notable positive response to the vitamin D3 supplementation.
Alongside improvements in pain, we also noted changes in certain inflammation markers in the blood. There was a significant decrease in pro-inflammatory cytokines like TNF-α and IL-17, while levels of IL-33 increased. This suggests that vitamin D3 might play a role in modulating the inflammatory processes related to knee OA.
Ultimately, our findings highlight the potential of vitamin D3 supplementation as a promising therapeutic option for managing knee OA symptoms. Further research is warranted to delve deeper into the role of IL-33 and its implications for osteoarthritis.
8
Vitamin D3 aids knee pain relief
The effect of vitamin D supplementation on knee osteoarthritis: A meta-analysis of randomized controlled trials.
We conducted a thorough analysis of several randomized controlled trials to see how vitamin D3 affects knee pain, particularly in those suffering from osteoarthritis (OA). By examining data from four studies involving over 1,100 participants, we looked specifically at pain relief and functional improvement as measured by the Western Ontario and McMaster Universities Arthritis Index (WOMAC).
Our findings are quite revealing: while vitamin D3 significantly reduced pain and improved function for those with knee OA, it did not prevent cartilage loss in the knee joints. This is an important distinction, as many may assume pain relief could also equate to structural benefits.
Interestingly, vitamin D3 supplementation of more than 2,000 IU daily showed the most promise in terms of reducing pain and enhancing functionality. However, it's worth noting that the treatment did not increase the risk of adverse effects when compared to placebo groups.
Overall, while vitamin D3 may help alleviate knee pain and improve overall mobility, the evidence does not support its use in slowing down the progression of knee osteoarthritis itself. This indicates a need for further research to explore more comprehensive treatment options for those managing OA.
8
Vitamin D3 aids post-operative pain
Role of Pre-operative Correction of Vitamin D3 Deficiency in Controlling Post-operative Bone Pain after Unicompartmental Knee Arthroplasty.
We investigated the role of Vitamin D3 in managing post-operative knee pain after unicompartmental knee arthroplasty (UKA). Our study involved 240 patients divided into three groups based on their Vitamin D3 levels. One group had their deficiency corrected before surgery, another received treatment after the operation, and the last group had normal levels from the start.
We aimed to determine not only how Vitamin D3 levels affected post-operative pain but also the benefits of correcting any deficiencies pre-operatively. Our findings revealed that correcting Vitamin D3 levels before surgery significantly improved pain management for patients. Those who were treated pre-operatively experienced better control of post-operative pain compared to those whose deficiencies were addressed afterwards.
In summary, we found that Vitamin D3 is an essential component in pre-operative assessments for patients undergoing UKA. Addressing any deficiencies beforehand seems to lead to improved outcomes in pain relief, highlighting its importance as a modifiable risk factor in surgical recovery.
1
Vitamin D3 shows no benefit
Effect of Vitamin D Supplementation on Tibial Cartilage Volume and Knee Pain Among Patients With Symptomatic Knee Osteoarthritis: A Randomized Clinical Trial.
We conducted a thorough investigation into the effects of vitamin D3 supplementation on knee pain and cartilage volume in people suffering from knee osteoarthritis, particularly those with low vitamin D levels. This study took place in Tasmania and Victoria, Australia, and was designed as a multicenter, randomized, double-blind, placebo-controlled clinical trial.
Over a span of two years, we divided participants into two groups: one received a monthly dose of oral vitamin D3 (50,000 IU), while the other group received a placebo. Our main focus was to evaluate any changes in tibial cartilage volume, measured through MRI, as well as the participants' knee pain levels as indicated by the Western Ontario and McMaster Universities Arthritis Index (WOMAC) pain score.
The results showed that, compared to the placebo group, those who received vitamin D3 experienced no significant differences in either tibial cartilage volume or reported knee pain over the two years. This indicates that vitamin D3 supplementation does not provide meaningful benefits for reducing tibial cartilage loss or improving knee pain in patients with symptomatic knee osteoarthritis.
9
Vitamin D3 alleviates knee pain
Restorative Effect of Vitamin D Deficiency on Knee Pain and Quadriceps Muscle Strength in Knee Osteoarthritis.
We aimed to understand how vitamin D3 supplementation influences knee pain and muscle strength in individuals suffering from knee osteoarthritis (KOA). The study involved 67 patients over the age of 30, all experiencing knee pain for at least a month and showing signs of vitamin D deficiency.
Participants received a weekly dose of 50,000 IU of oral cholecalciferol (vitamin D3) for a span of two months. By the end of the treatment, nearly all participants had sufficient levels of vitamin D. Significant improvements were observed; serum vitamin D levels rose, quadriceps muscle strength increased, and knee pain decreased for the majority of participants.
Specifically, the pain reduction was measurable through standard pain assessment methods. The findings suggest a clear link between correcting vitamin D deficiency and improvements in both muscle strength and pain levels for those living with KOA.
References
Rajani AM, Mittal A, Kulkarni VU, Rajani KA, Rajani KA. Role of Pre-operative Correction of Vitamin D3 Deficiency in Controlling Post-operative Bone Pain after Unicompartmental Knee Arthroplasty. Malays Orthop J. 2024;18:7. doi:10.5704/MOJ.2411.002
Qi L, Guo Y. Fibrodysplasia Ossificans Progressiva: A Case Report. Cureus. 2024;16:e55528. doi:10.7759/cureus.55528
Divjak A, Jovanovic I, Matic A, Lucic AT, Gajovic N, et al. The influence of vitamin D supplementation on the expression of mediators of inflammation in knee osteoarthritis. Immunol Res. 2023;71:442. doi:10.1007/s12026-022-09354-0
Peng HM, Weng XS, Li Y, Feng B, Qian W, et al. Effect of alendronate sodium plus vitamin D tablets on knee joint structure and osteoarthritis pain: a multi-center, randomized, double-blind, placebo-controlled study protocol. BMC Musculoskelet Disord. 2022;23:584. doi:10.1186/s12891-022-05521-4
Maniar RN, Maniar AR, Jain D, Bhatnagar N, Gajjar A. Vitamin D Trajectory after Total Knee Arthroplasty: A Method for Quick Correction in Deficient Patients. Clin Orthop Surg. 2021;13:336. doi:10.4055/cios20147
Tu L, Zheng S, Cicuttini F, Jin X, Han W, et al. Effects of Vitamin D Supplementation on Disabling Foot Pain in Patients With Symptomatic Knee Osteoarthritis. Arthritis Care Res (Hoboken). 2021;73:781. doi:10.1002/acr.24371
Gao XR, Chen YS, Deng W. The effect of vitamin D supplementation on knee osteoarthritis: A meta-analysis of randomized controlled trials. Int J Surg. 2017;46:14. doi:10.1016/j.ijsu.2017.08.010
Xu C, Ma C, Bai Y. A pediatric hypophosphatemic rickets on MRI, Tc-MDP bone scan and F-FDG PET/CT. Hell J Nucl Med. 2017;20:93. doi:10.1967/s002449910515
Jin X, Jones G, Cicuttini F, Wluka A, Zhu Z, et al. Effect of Vitamin D Supplementation on Tibial Cartilage Volume and Knee Pain Among Patients With Symptomatic Knee Osteoarthritis: A Randomized Clinical Trial. JAMA. 2016;315:1005. doi:10.1001/jama.2016.1961
Heidari B, Javadian Y, Babaei M, Yousef-Ghahari B. Restorative Effect of Vitamin D Deficiency on Knee Pain and Quadriceps Muscle Strength in Knee Osteoarthritis. Acta Med Iran. 2015;53:466.
McAlindon T, LaValley M, Schneider E, Nuite M, Lee JY, et al. Effect of vitamin D supplementation on progression of knee pain and cartilage volume loss in patients with symptomatic osteoarthritis: a randomized controlled trial. JAMA. 2013;309:155. doi:10.1001/jama.2012.164487
Cao Y, Jones G, Cicuttini F, Winzenberg T, Wluka A, et al. Vitamin D supplementation in the management of knee osteoarthritis: study protocol for a randomized controlled trial. Trials. 2012;13:131. doi:10.1186/1745-6215-13-131
Lian LM, Chang YC, Yang CC, Yang JC, Kao KP, et al. Adult Fanconi syndrome with proximal muscle weakness and hypophosphatemic osteomalacia: report of a case. J Formos Med Assoc. 1994;93:709.