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Head-to-head evidence comparison — which supplement is right for you?
Biotin vs Rice Protein: Biotin has the stronger overall evidence (5 vs 4.5/10); they work on different things and are often used together, not either/or. Take the 60-second quiz for a pick tailored to your goals.
Biotin wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Probably helps
5 of 8 studies with measurable effects showed benefit.
Top outcomes
Verdict
Mostly mechanism / observational
Top outcomes
2500-5000mcg (2.5-5mg) for hair/nails
Any time of day
Biotin capsules or tablets
30-48g per serving (the muscle RCT used 48g; dose high because leucine density is lower)
any
Brown rice protein isolate (often blended with pea protein)
Raw egg protein can reduce biotin absorption
Use cooked egg protein or separate biotin from raw egg protein by 2+ hours.
3-6 months
3-6 months
8 weeks
Acute-days
Throughout use
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.
The effects of 8 weeks of whey or rice protein supplementation on body composition and exercise performance.
Nutr J (2013) · Rct · n=24
8-week RCT in resistance-trained men; 48g rice protein isolate vs 48g whey isolate post-workout
Protein content and amino acid composition of commercially available plant-based protein isolates.
Amino Acids (2018) · In vitro
Analyzed amino-acid composition of brown rice and other plant vs animal protein isolates by UPLC-MS/MS
Effect of protein texturization on amino acids and protein in vitro bioaccessibility of pea and rice protein.
Food Funct (2025) · In vitro
Evaluated in-vitro digestibility/bioaccessibility of pea, rice, and a 50:50 blend
Biotin has a higher evidence score (5/10 vs 4.5/10) and wins in 2 of 3 categories.
Raw egg protein can reduce biotin absorption Use cooked egg protein or separate biotin from raw egg protein by 2+ hours. Consult a healthcare provider for personalized advice.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.