HMB vs Sulforaphane (from Broccoli Sprout Extract)

Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.

HMBSulforaphane (from Broccoli Sprout Extract)
CategorySupplementsSupplements
Standard Dose
Timing
Cycle Duration
Evidence LevelModerateStrong
A

HMB

Supplements

Mechanism

Leucine metabolite that reduces muscle protein breakdown and may support recovery under high training or caloric deficit conditions.

Contraindications

  • None established at standard doses

Mechanism

Isothiocyanate that activates Nrf2 — the master regulator of antioxidant defense. Upregulates glutathione synthesis, phase II detoxification enzymes, and heat shock proteins. Also inhibits HDAC (epigenetic modifier) and NF-kB (anti-inflammatory).

Contraindications

  • Thyroid conditions (goitrogen at very high doses)
  • Cruciferous vegetable allergy

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