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Scored forOutcome alternatives
Life Extension120 count • 30 servingsAvailable now$22.27$0.74 / serving4.7 · 6,739 ratings
87Category leader
#1 of 2320 ranked for nail strengthThis product sets the leader mark
Why this ranks #1 for nail strength
Because it wins- Evidence fitEvidence is still thin for Biotin and Keratin.
- Dose fit2 of 2 dosed ingredients land in the studied range. Biotin at 2500 mcg lands inside the studied 2500-5000 mcg window.
- Price / serving$0.74 per serving — high 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 strength
87
95
77
99
2500 mcgIn rangeinside the studied 2500-5000 mcg window
500 mgIn rangeinside the studied 500-500 mg window
13.7 mg
2500 mg
1.6 mg
18 mg
2 mg
1.5 mg
15 mg
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