Sulforaphane (Broccoli Extract): Uses, Benefits, Dosage & Safety
Last updated: June 2026 · Reviewed by the FactoWiki Editorial Team for clarity and source accuracy
Quick summary
Sulforaphane, from broccoli sprouts, is a compound that switches on the body's own antioxidant and detoxification defences (the Nrf2 pathway). It's one of the more scientifically interesting 'detox' compounds.
What is Sulforaphane?
Sulforaphane is a sulfur compound formed when you crush or chew cruciferous vegetables, especially broccoli sprouts. Supplements usually supply its precursor (glucoraphanin) plus the enzyme myrosinase needed to convert it. It's marketed for 'detox', antioxidant and cellular-health support.
What Sulforaphane is commonly used for
In supplements, Sulforaphane is most often included for skin & anti-aging support. It is used as nutritional support, not as a treatment for any medical condition — the distinction matters, because the claims on a sales page are often stronger than the evidence allows.
How Sulforaphane works
Sulforaphane activates Nrf2, a master switch that turns on the body's own antioxidant and detoxification enzymes — a genuinely well-characterised mechanism. This 'indirect antioxidant' action is more durable than simply supplying antioxidants directly.
What the evidence says
Here's an honest snapshot of what published research suggests about Sulforaphane — including where the evidence is limited.
- Sulforaphane robustly activates the Nrf2 detox/antioxidant pathway, and early human studies show effects on detoxification markers and some inflammatory measures. (PubMed research)
- Clinical benefits for specific conditions are still being studied, so it's promising rather than proven. (PubMed research)
Typical dosage used in studies
Studies vary; broccoli-sprout extracts standardised to glucoraphanin/sulforaphane are used, with active myrosinase improving conversion. This is research information for context, not a recommendation — confirm what's appropriate for you with a healthcare professional.
Side effects and safety
Generally well tolerated; high doses may cause digestive upset or gas.
Medication interactions and who should avoid Sulforaphane
Medication & safety check
Low interaction risk at dietary levels; it may affect drug-metabolising enzymes at high intakes.
This is general information, not personal medical advice. If you take any medication, confirm it's safe to combine with Sulforaphane with your doctor or pharmacist first.
Sources & further reading
The summary above is drawn from peer-reviewed research and authoritative references. For general, authoritative background you can also consult:
- PubMed research on Sulforaphane
- NIH Office of Dietary Supplements
- NIH National Center for Complementary and Integrative Health
- MedlinePlus (U.S. National Library of Medicine)
Frequently asked questions
What does sulforaphane do?
It activates Nrf2, switching on the body's own antioxidant and detox enzymes.
Is broccoli sprout extract worth it?
It's one of the better-characterised 'detox' compounds, though clinical benefits are still being studied.
Why is myrosinase important?
The enzyme myrosinase converts the precursor glucoraphanin into active sulforaphane.
Is sulforaphane safe?
Generally yes; high doses may cause digestive upset.
Related ingredients to explore
Ingredients often studied or formulated alongside Sulforaphane — useful for understanding the full picture of a formula.