Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis

source extracted confidence: high 2026-04-09
#adult #aged #collagen #dietary-supplements #elasticity

Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis

de et al., 2021 | Int J Dermatol | Meta Analysis

Citation

de Miranda Roseane B, Weimer Patrícia, Rossi Rochele C. Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis. Int J Dermatol. 2021-Dec;60(12):1449-1461. doi:10.1111/ijd.15518

Abstract

Skin aging has become a recurring concern even for younger people, mainly owing to increased life expectancy. In this context, the use of nutricosmetics as supplements has increased in recent years. Moreover, numerous scientific studies have shown the benefits of hydrolyzed collagen supplementation in improving the signs of skin aging. The objective of this study was to summarize the evidence on the effects of hydrolyzed collagen supplementation on human skin through a systematic review followed by a meta-analysis of clinical trials focusing on the process of skin aging. A literature search was conducted in the Medline, Embase, Cochrane, LILACS (Latin American and Caribbean Health Sciences Literature), and Journal of Negative Results in BioMedicine databases. Eligible studies were randomized, double-blind, and controlled trials that evaluated oral supplementation with hydrolyzed collagen as an intervention and reported at least one of the following outcomes: skin wrinkles, hydration, elasticity, and firmness. After retrieving articles from the databases, 19 studies were selected, with a total of 1,125 participants aged between 20 and 70 years (95% women). In the meta-analysis, a grouped analysis of studies showed favorable results of hydrolyzed collagen supplementation compared with placebo in terms of skin hydration, elasticity, and wrinkles. The findings of improved hydration and elasticity were also confirmed in the subgroup meta-analysis. Based on results, ingestion of hydrolyzed collagen for 90 days is effective in reducing skin aging, as it reduces wrinkles and improves skin elasticity and hydration.

Key Findings

Based on results, ingestion of hydrolyzed collagen for 90 days is effective in reducing skin aging, as it reduces wrinkles and improves skin elasticity and hydration.

Outcomes Measured

  • Requires manual extraction

Population

Field Value
Population See abstract
Sample Size 1125
Age Range See abstract
Condition See abstract

MeSH Terms

  • Adult
  • Aged
  • Collagen
  • Dietary Supplements
  • Elasticity
  • Female
  • Humans
  • Male
  • Middle Aged
  • Randomized Controlled Trials as Topic
  • Skin
  • Skin Aging
  • Young Adult

Evidence Classification

  • Level: Meta Analysis
  • Publication Types: Journal Article, Meta-Analysis, Systematic Review
  • Vertical: collagen-skin

Provenance

Source extracted via PubMed E-utilities API on 2026-04-09