Collagen vs Retinol for skin & hair
Short answer: For skin & hair, users rate them about the same: 96% report improvement with Collagen (71 reports) and 100% with Retinol (11 reports).
Collagen has 9 meta-analyses and 22 randomized trials on PubMed; Retinol has 138 and 893.
Based on 292 reports about Collagen and 20 about Retinol. Not medical advice.
| Collagen Supplement | Retinol Supplement | |
|---|---|---|
| Users say it helped | 56%helped120 reports · high confidence | 90%helped10 reports · few reports |
| Verdict | Mixed | Mostly positive |
| Research | AResearch: Strong | AResearch: Strong |
| Meta-analyses / RCTs | 9 / 22 | 138 / 893 |
| Mainly used for | ||
| Skin & hair % reporting improvement | 96% (71) | 100% (11) |
| Recovery % reporting improvement | 94% (47) | — |
| Pain & inflammation % reporting improvement | 92% (24) | — |
| Sleep % reporting improvement | 100% (8) | — |
| Performance % reporting improvement | 100% (5) | — |
| Common side effects | fatigue, insomnia, drowsiness, histamine episode | osteoporosis, neurotoxicity |
| Typical dose reported | 7 g / daily | — |
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.
Int J Dermatol, 2021 ↗“Within hours of consumption my consistent upper back pain is literally gone, but along with it comes dizziness and a feeling of aloofness.”
Exercise training represents an anti-inflammatory therapy and metabolism-improving strategy with minimal side effects for patients with type 2 diabetes mellitus.
J Sport Health Sci, 2023 ↗“Actually Im already using retinol 0.025% daily which i shouldve mentioned in OP, and I havent had acne for the last 3ish years.”
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Percentages come from first-hand user reports and are not clinical outcomes. Talk to a doctor before starting, stopping or combining anything. How we rate