ByDr. Brennan Commerford, D.C.·Last reviewed: July 2026
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Broccoli Seed Extract (13% Glucoraphanin): verification pending

We’re confirming the science for this compound before we publish a form ranking. Our team reviews every ranked page against peer-reviewed absorption data — this one is still under review, so we are not showing a score yet.

Check back soon. Rankings are reviewed by Dr. Brennan Commerford, D.C.

References

  1. In a randomized double-blind crossover (n=16), glucoraphanin co-delivered with myrosinase doubled sulforaphane bioavailability (39.8% vs 18.6%) measured by urinary metabolites. PubMed
  2. Human subjects (200 umol SFN/day) showed ~3x higher sulforaphane plasma/urinary metabolite levels from fresh sprouts than from a broccoli sprout extract. PubMed
  3. In a human crossover, sulforaphane plasma/urinary bioavailability was dramatically lower from a myrosinase-inactive broccoli supplement than from fresh sprouts. PubMed

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.