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The inclusion of collagen in wrinkle treatment creams is based on its key role in skin structure and elasticity. Collagen is a protein that provides support and firmness to the skin. As we age, the natural levels of collagen in the skin decrease, leading to the formation of wrinkles and sagging.

Many skincare products claim to stimulate collagen production or include collagen in their formulations, aiming to enhance the skin's appearance and reduce signs of aging. Collagen molecules can help improve skin hydration and maintain its plumpness, contributing to a youthful appearance. While topical application of collagen may not directly penetrate deeply into the skin, it can contribute to surface hydration and may help improve the overall texture of the skin.

Other ingredients, such as vitamins, retinoids, and peptides, also play significant roles in skincare and wrinkle reduction. Vitamins are essential for overall skin health, retinoids promote cell turnover and can stimulate collagen synthesis, and peptides can signal cells to produce more collagen or help improve skin barrier function. However, collagen itself stands out as a fundamental ingredient recognized for its direct association with skin structure and firmness, making it a significant choice in the context of wrinkle treatment.