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Vitamin C protects knee joint from wear and tear
Supplementing with vitamin C may protect against osteoarthritis. In a US epidemiological cohort study, the use of vitamin C supplements reduced the risk of knee osteoarthritis by 11 percent.
In 2011, researchers at the University of South Florida published a study involving 1,023 participants in the project. An earlier study, based on the same project, had already shown that the use of multivitamins reduced the risk of osteoarthritis in the knee by 7 percent. [J Musculoskel Res. 2009;12:85-93.]
The epidemiologists actually wanted to know whether the use of vitamin C supplements can reduce the risk of osteoarthritis in the knee joint. Vitamin C is a key player in the production of collagen - and the daily dietary intake of this vitamin is relatively low in surprisingly large parts of the population. In their effort to reduce confounding background variables, the researchers removed these multivitamin users from their sample.
This way, the epidemiologists got a group of 866 study participants who did not have osteoarthritis when the study started. The other 157 study participants had already been diagnosed with the disease.
The researchers have no data on the dosage, form and duration of use.
"The acceptable and most effective dosing range of vitamin C is still controversial, but recent studies have found that doses of up to 2000 mg/d are safe for most adults."
"Clinicians may want to consider recommending vitamin C supplements to those at greatest risk for osteoarthritis."