fix. Its caption goes much further by promising to reverse cartilage damage within 24 hours. That promise is not supported by the medical sources reviewed for this article.
What the research says
In a 2025 randomized trial, 80 adults with mild knee osteoarthritis received either a specific collagen-peptide preparation or a placebo over 180 days. The researchers reported improvement in pain with the collagen preparation. This was a study of one formulation in a selected group; it does not establish that every product works, that severe joint damage can be reversed, or that benefits occur in a day.
The National
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