Evidence-backed FAQ
What collagen doses have been studied?
Direct answer
Trials of skin outcomes commonly used daily oral hydrolyzed collagen for periods up to about 90 days, but pooled abstracts did not establish one standardized gram-per-day amount.[1], [2]
What the evidence shows
Meta-analyses associated daily hydrolyzed collagen with improved skin hydration and elasticity versus placebo, predominantly in adult women.[1], [2]
Important limitations
Studies differed in collagen source, amount, and duration and had methodological biases. Studied use should not be presented as one universal personal dose.[1], [2]
Related questions
- Is there one daily dose for every goal?
- How long were skin studies conducted?
Read the full evidence summary
This FAQ is the concise answer. The linked research page provides the full study context, populations, doses, outcomes, and limitations.
References
- Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis.. International journal of dermatology. 2021. Systematic review and meta-analysis View source →
- Effects of Oral Collagen for Skin Anti-Aging: A Systematic Review and Meta-Analysis. Nutrients. 2023. Systematic review and meta-analysis View source →