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Head-to-head evidence comparison — which supplement is right for you?
Astaxanthin vs Biotin: Astaxanthin has the stronger overall evidence (5 vs 5/10); they're alternatives for improve skin health — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Astaxanthin wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
3 of 4 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
5 of 8 studies with measurable effects showed benefit.
Top outcomes
4-12mg
With a meal containing fat
Softgels from Haematococcus pluvialis algae
2500-5000mcg (2.5-5mg) for hair/nails
Any time of day
Biotin capsules or tablets
6-12 weeks
4 weeks
2-4 weeks
3-6 months
3-6 months
Systematic Review and Meta-Analysis on the Effects of Astaxanthin on Human Skin Ageing
Nutrients (2021) · Meta analysis
Ingestion and/or topical usages of ASX may be effective in reducing skin ageing and have promising cosmetical potential, as it improves moisture content and elasticity and reduces wrinkles.
Effect of astaxanthin supplementation on female fertility and reproductive outcomes: a systematic review and meta-analysis of clinical and animal studies
Journal of ovarian research (2024) · Meta analysis
This systematic review shows that AST supplementation may improve assisted reproductive technology outcomes by enhancing oocyte quality and reducing OS in the reproductive organs.
Astaxanthin supplementation mildly reduced oxidative stress and inflammation biomarkers: a systematic review and meta-analysis of randomized controlled trials
Nutrition research (New York, N.Y.) (2022) · Meta analysis · n=380
Compared with placebo, astaxanthin significantly reduced blood malondialdehyde concentration (standardized mean difference [SMD]: -0.95; 95% CI, -1.67 to -0.23; P = .01).
Quantitative comparison of the efficacy of clinical drug treatments for primary progressive multiple sclerosis
Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia (2023) · Meta analysis · n=3779
Among these, ocrelizumab showed outstanding performance, with wCDP% of 72.6 at 96 weeks, while the proportions of rest of the drugs ranged between approximately 55-70%.
Vitamin supplementation in the treatment of optic neuritis: A systematic review and meta-analysis
Multiple sclerosis and related disorders (2025) · Meta analysis · n=2465
The effect of MD1003 (high-dose biotin), vitamin A, and vitamin D on retinal nerve fiber layer (RNFL) thickness from pooled results showed a mean change of 0.15 (SMD 0.15, 95 % CI, -0.33 to 0.64, I2 = 61 %, τ² = 0.11, p = 0.08), which was not significant.
High-dose biotin for multiple sclerosis: A systematic review and meta-analyses of randomized controlled trials
Multiple sclerosis and related disorders (2021) · Meta analysis · n=830
Pooled data for ITW25 at 12 to 15 months yielded statistical significance (RR 2.06; 95% CI 1.04-4.09; 2 trials; 796 participants; I2 = 0%) [moderate COE] favoring HDB among patients with PMS.
Based on limited meta-analysis data showing cosmetic benefits. Conservative effectiveness estimate due to cosmetic nature of outcomes and limited study population. Higher doses may cause orange skin tint.
AI-estimated from published studies. Interpret as directional guidance.
Astaxanthin has a higher evidence score (5/10 vs 5/10) and wins in 2 of 3 categories.
For improve skin health, Astaxanthin has a higher relevance score (52 vs 45).
No known interactions between Astaxanthin and Biotin have been documented in our database. However, always consult a healthcare provider before combining supplements.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.