Aging often manifests visibly on the skin, marking the initial signs of internal health and lifestyle impacts. The skin’s functions include protection, temperature regulation, and immune defense. As aging disrupts collagen balance, it leads to decreased skin density, dryness, and wrinkles. Similarly, nails become more fragile and grow slower with age.
Dietary supplements, especially collagen peptides, have gained attention for their potential benefits in maintaining skin and nail health. These peptides are noted for their high bioavailability and positive effects on skin hydration and elasticity. A recent study investigated the effectiveness of daily collagen peptide supplementation on skin aging in an East Asian population, recognizing demographic variations in supplement response.
Materials and Methods
Conducted from September 2019 to January 2020, the study involved 85 women aged 40 to 65 with visible signs of facial aging. This randomized, double-blind, placebo-controlled trial compared collagen peptide supplementation to a placebo (maltodextrin). Both groups used the same face cream and avoided other skincare treatments. Skin and nail parameters were measured at four intervals: 28 days before treatment, day 0, day 28, and day 84. Statistical analyses, including ultrasound scans, visual assessments, and wrinkle measurements, were used to evaluate the results.
Results
Ultrasound scans indicated a 6.3% increase in dermis density in the collagen peptide group compared to the placebo group by day 84. Both groups showed improvements in skin elasticity and moisture, but the collagen peptide group had more significant benefits, especially in elasticity and hydration after 28 days. Wrinkle depth was notably reduced in the collagen peptide group after 28 days, and both groups showed decreased wrinkle length and volume by day 84. Participants in the collagen peptide group also reported earlier improvements in skin appearance.
Nail color analysis revealed less yellowing in the collagen peptide group compared to the placebo group after 28 days, with no increase in nail darkness over time.
Conclusion
The study concluded that daily intake of 5 grams of collagen peptides effectively counters age-related declines in skin density, elasticity, and moisture. By standardizing facial care routines, the research attributed the observed skin improvements to collagen supplementation. Participants’ reports of enhanced skin beauty aligned with the clinical findings, supporting the beneficial effects of collagen peptides—regardless of their source—on skin and nail health.
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