Sulforaphane (Broccoli Seed Extract) vs TUDCA

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

Sulforaphane (Broccoli Seed Extract)TUDCA
CategorySupplementsSupplements
Standard Dose10-30mg sulforaphane daily (equivalent to ~100-200mg broccoli seed extract standardized to glucoraphanin + myrosinase)
TimingOn empty stomach or with light meal. Myrosinase enzyme required for conversion from glucoraphanin — ensure supplement contains it or add mustard seed powder.
Cycle Durationongoing
Evidence Levelstrong_humanModerate

Mechanism

Sulforaphane is the most potent natural activator of the Nrf2-ARE (antioxidant response element) pathway. It modifies Keap1 cysteine residues, releasing Nrf2 to translocate to the nucleus and upregulate >200 cytoprotective genes including NQO1, glutathione S-transferases, heme oxygenase-1, and UDP-glucuronosyltransferases (Phase II detox enzymes). It also inhibits HDAC activity (epigenetic modification), induces Phase II/III xenobiotic metabolism, and suppresses NF-kB inflammatory signaling.

Standard Dosing

10-30mg sulforaphane daily (equivalent to ~100-200mg broccoli seed extract standardized to glucoraphanin + myrosinase)

Timing

On empty stomach or with light meal. Myrosinase enzyme required for conversion from glucoraphanin — ensure supplement contains it or add mustard seed powder.

Cycle Duration

ongoing

Side Effects

  • Gas/bloating
  • Mild GI discomfort
  • Thyroid concerns at very high doses in iodine-depleted individuals

Contraindications

  • Hypothyroidism with iodine deficiency (goitrogenic potential)
  • Pregnancy (insufficient high-dose data)

Best Stacking Partners

NACDIMCalcium D-GlucarateCurcumin
B

TUDCA

Supplements

Mechanism

Hydrophilic bile acid that stabilizes hepatocyte membranes, supports bile flow, and reduces endoplasmic reticulum stress. Often used in higher-load liver support and lipid-heavy protocols.

Contraindications

  • Caution with active gallbladder obstruction

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