Green tea: A new approach to overcome osteoarthritis

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Green tea: A new approach to overcome osteoarthritis

Recent research published in Clinical Nutrition says that a green tea can reduce pain in joints and could keep osteoarthritis (OA) at bay. Osteoarthritis is a progressive degenerative joint disease that has a major impact on joint function and thus affects quality of life. It is the most frequent cause of physical disability among older population across the world.

For centuries, green tea is one of the most popular beverages consumed globally and known as a dietary supplement with novel functions. It is obtained from the plant Camellia sinensis. Researchers conducted a randomized open-label active-controlled study  to explore the efficacy and safety of green tea for patients with knee OA.

In this study, researchers randomly allocated the patients into intervention group and  control group. In intervention group, 50 adults with knee OA received green tea extract (in the form of tablet) plus diclofenac tablet and control group received diclofenac tablet alone for four weeks. Patients were assessed initially and post treatment for pain score usng visual analogue scale (VAS), and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) questionnaire's total score in addition to its 3 sub-scores. Furthermore, patients were asked to report adverse effects during intervention period, if any.

The results showed significant reduction in VAS score, total WOMAC, and WOMAC physical function as compared to control group such as (p=0.038, p=0.006, and p=0.004, respectively). No significant differences were seen between the two groups, in terms of mean differences of WOMAC pain and stiffness scores of the enrolled patients (p=0.163, and p=0.150, respectively). Additionally, in control group, just one case of gastric problem was reported.

Thus, it appears that green tea extract might be regarded as an adjunctive treatment for pain control and for the betterment of knee joint physical activity in adults with OA. However, further research is needed with larger sample size and of longer study duration.


Clinical Nutrition

Link to the source:

Original title of article:

Green tea (Camellia sinensis) for patients with knee osteoarthritis: A randomized open-label active-controlled clinical trial


Mohammad Hashem Hashempur, Sarah Sadrneshin, Seyed Hamdollah Mosavat, Alireza Ashraf

Clinical Nutrition
Therapeutic, Epigallocatechin-3-gallate (EGCG), Diclofenac, Osteoarthritis, Knee, Catechin, Analgesia, Randomized Open-label Active-Controlled Clinical Trial, Efficacy, VAS, WOMAC, Orally
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