Collagen supplements are increasingly popular in the wellness industry, marketed for benefits ranging from improved skin appearance to enhanced joint health and athletic performance. A new comprehensive review published in the Aesthetic Surgery Journal Open Forum evaluates the credibility of these claims, confirming some while discounting others.
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Conducted by researchers at Anglia Ruskin University (ARU), this study synthesizes data from 16 systematic reviews, 113 randomized controlled trials, and involved nearly 8,000 participants globally. The findings indicate that collagen supplementation can lead to measurable improvements in skin health and alleviate symptoms of osteoarthritis, but it does not enhance sports performance.
The review represents the first integrated meta-analysis and meta-regression focused on major health areas associated with collagen supplementation. By analyzing a vast body of evidence, the researchers identified patterns relating to dosage and duration of usage. They observed that prolonged collagen intake resulted in better skin hydration and elasticity, as well as reduced pain and stiffness in individuals with osteoarthritis.
In addition to skin and joint health, collagen was also linked to modest improvements in muscle mass and structure, which supports the notion of its role in healthy aging. While these benefits were noted, they were generally regarded as moderate rather than substantial.
Conversely, the review found limited evidence to support claims that collagen enhances athletic performance. Results indicated no significant benefits for post-exercise muscle recovery, muscle soreness, or tendon properties, leading the authors to advise against considering collagen as a quick fix for athletic enhancement.
The study also evaluated collagen's impact on oral health and cardiometabolic factors like cholesterol levels and blood pressure. Here, the evidence was mixed or inconclusive, lacking strong support for significant benefits in metabolic health or dental applications.
Researchers pointed out that newer clinical trials often show stronger results, potentially due to advancements in collagen formulations and enhanced study methodologies.
Lee Smith, Professor of Public Health at ARU and co-author of the study, emphasized the importance of the findings, stating: "This study brings together the strongest evidence to date on collagen supplementation. While collagen is not a cure-all, it provides credible benefits when used consistently, especially for skin and osteoarthritis. Our work helps clarify its role in healthy aging while dispelling some myths."
Smith called for more high-quality clinical trials to explore long-term health outcomes, optimal dosages, and variations between different collagen sources. This study represents a key step towards better public guidance and improved future research.