What does the evidence say about Collagen Supplements and Skin?

The current Migaku evidence database contains 3 reusable source documents for Collagen Supplements and Skin. This answer focuses on benefits, uncertainty, and practical interpretation. - Background Centella asiatica has been widely recognized for its dermatological benefits; however, clinical evidence supporting the efficacy of oral supplementation for improving skin aging parameters remains limited. [Hur N (2026); evidence level 2] - Maximum wrinkle depth and total wrinkle volume were reduced by 13.3% and 13.7%, respectively, while surface roughness (Ra) decreased by 10.4%. [Hur N (2026); evidence level 2] - Epidermal hydration at the cheek site significantly increased, while transepidermal water loss decreased, indicating improved skin barrier function. [Hur N (2026); evidence level 2] - This randomized, double-blind, placebo-controlled study evaluated the effects of oral Centella asiatica extract on skin wrinkles and related skin parameters in middle-aged women. [Hur N (2026); evidence level 2] - Objective This study aimed to determine whether liposomal delivery enhances the effects of a collagen tripeptide-containing formulation on dermal structural and biomechanical parameters, as well as appearance-related skin properties, compared with a nonliposomal formulation and placebo. [Lin YK (2026); evidence level 2] Evidence levels are sorting aids, not final clinical grades. Level 1 usually indicates systematic-review style evidence, level 2 indicates randomized trials or public-health guidance, and lower levels need more cautious wording. This page is educational. People with medical conditions, pregnancy, medication use, or unusual symptoms should ask a qualified clinician before changing supplements, medication, or treatment routines.