Collagen supplements are believed to improve skin health by enhancing hydration, elasticity, and reducing wrinkles, as some studies suggest benefits in older adults. They may also support joint health, potentially reducing pain associated with osteoarthritis and improving bone mineral density, particularly in postmenopausal women [2][4][6]. However, many studies have been sponsored by supplement manufacturers, raising concerns about potential bias [5]. 

On the downside, the effectiveness of collagen supplements remains debated, as they may not integrate into the body’s collagen effectively after digestion. Additionally, they often contain animal products, making them unsuitable for those following a plant-based diet [3][5][6]. The supplement industry is also less regulated, which can raise safety and quality issues [1][3].

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