Top pick · DoseRank
Why this ranks #1 for hba1c
#1
Natural Factors, WellBetX® Berberine, 60 Vegetarian Capsules (500 mg per Capsule)
Natural Factors$0.30 / serving4.7 · 48,246Available now
Why this ranks here
- Evidence fitBerberine is the strongest evidence signal for this outcome.
- Dose fitBerberine at 1000 mg lands inside the studied 900-1500 mg window.
- Price / serving$0.30 per serving — mid price tier for this outcome.
- AvailabilityIn stock across major retailers; 99% availability confidence.
- TrustStrong trust signals — consistently high marks from verified buyer ratings.
Trade-offs
Dose fit is the weak spot on this list
The numbers
85
89
71
63
1000 mgIn rangeinside the studied 900-1500 mg window