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Head-to-head evidence comparison — which supplement is right for you?
Collagen vs Riboflavin: they're closely matched on evidence (6 vs 6.5/10); they're alternatives for bone health — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Collagen and Riboflavin are closely matched across evidence, studies, and safety.
Verdict
Likely helps
6 of 6 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
8 of 10 studies with measurable effects showed benefit.
Top outcomes
10-15g
Any time of day, With vitamin C for enhanced synthesis
Hydrolyzed collagen peptides (powder)
25-50mg for general health; 400mg for migraine prevention
With food for better absorption, Morning with other B vitamins
Riboflavin or Riboflavin-5-Phosphate (R-5-P)
8-12 weeks
8-12 weeks
12 weeks
First week
3 months
2-4 weeks
Immediate
Effects of Collagen Supplements on Skin Aging: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
The American Journal of Medicine (2025) · Meta analysis · n=1474
A total of 23 RCTs with 1474 participants were analyzed.
Effect of collagen supplementation on knee osteoarthritis: an updated systematic review and meta-analysis of randomised controlled trials
Clinical and experimental rheumatology (2025) · Meta analysis · n=870
The meta-analysis revealed an overall significant improvement of both function [MD, -6.46 (95% CI -9.52, -3.40); I2=75%; p=0.00001] and pain scores [MD, -13.63 (95% CI -20.67, -6.58); I2=88%; p=0.00001], favouring collagen supplementation.
Impact of Collagen Peptide Supplementation in Combination with Long-Term Physical Training on Strength, Musculotendinous Remodeling, Functional Recovery, and Body Composition in Healthy Adults: A Systematic Review with Meta-analysis
Sports medicine (Auckland, N.Z.) (2024) · Meta analysis · n=768
This systematic review and meta-analysis represents the first comprehensive investigation into the effects of long-term CP supplementation combined with regular physical training on various aspects of musculoskeletal health in adults.
Effect of Vitamin B2 supplementation on migraine prophylaxis: a systematic review and meta-analysis
Nutritional neuroscience (2022) · Meta analysis · n=673
Vitamin B2 supplementation significantly decreased migraine days (p = .005, I2 = 89%), duration (p = .003, I2 = 0), frequency (p = .001, I2 = 65%), and pain score (p = .015, I2 = 84%).
Effects of selected dietary supplements on migraine prophylaxis: A systematic review and dose-response meta-analysis of randomized controlled trials
Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology (2025) · Meta analysis
In adults, compared with placebo, these supplements did not significantly affect other outcomes, and omega-3 supplementation did not yield a statistically significant reduction in any of these outcomes.
Riboflavin supplements for blood pressure lowering in adults
The Cochrane database of systematic reviews (2025) · Meta analysis · n=320
The evidence for the effect of oral riboflavin supplements on systolic and diastolic blood pressure is very uncertain.
Meta-analysis of 23 RCTs (n=1474) found collagen significantly improved skin hydration, elasticity, and wrinkles overall, but high-quality and non-industry-funded studies showed no significant effect. Hydrolyzed collagen peptides preferred for bioavailability.
Based on meta-analysis showing significant reduction in migraine frequency, days, duration, and pain score. High heterogeneity (I2=65-89%) in pooled analyses suggests variable individual responses. Most studies used 400mg daily dose.
AI-estimated from published studies. Interpret as directional guidance.
Both Collagen and Riboflavin are closely matched — the best choice depends on your specific health goals.
For bone health, Collagen has a higher relevance score (85 vs 75).
No known interactions between Collagen and Riboflavin have been documented in our database. However, always consult a healthcare provider before combining supplements.
The honest tier list — proven staples vs situational vs mostly marketing. The hub the other guides feed into.
Curcumin, omega-3, UC-II collagen, Boswellia vs the old glucosamine default — and OA vs RA.
Modest-but-real for skin, growing for joints, weak for hair/nails — plus which type to buy.
Magnesium, riboflavin, CoQ10 — the supplements with real migraine-prevention evidence (and doses).
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.