Product photo 1 of 10
Scored forOutcome alternatives
21st Century360 count • 360 servingsAvailable now$20.89$0.06 / serving4.7 · 47,515 ratings
87−5 pts from leader
#9 of 3521 ranked for nail brittlenessLeader · NeoCell, NeoCell, Grassfed Collagen Peptides + Vitamin C & Biotin, 270 Tablets — 92
Why this ranks #9 for nail brittleness
- Evidence fitEvidence is still thin for Biotin.
- Dose fitBiotin at 10000 mcg is higher than the studied 2500-5000 mcg window.
- Price / serving$0.06 per serving — low price tier for this outcome.
- AvailabilityIn stock across major retailers; 99% availability confidence.
- TrustStrong trust signals — consistently high marks from verified buyer ratings.
The numbers · Nail brittleness
87
89
93
99
10000 mcgAbove rangehigher than the studied 2500-5000 mcg window
96 mg
Retailer links may be affiliate links. Rankings and placement are not paid placement.
