Sulforaphane (SFN) is a potent isothiocyanate compound derived from glucoraphanin in cruciferous vegetables (especially broccoli sprouts, broccoli, Brussels sprouts, cabbage). It is a powerful inducer of Phase II detoxification enzymes and has epigenetic, anti-inflammatory, and neuroprotective properties.
Sulforaphane is released when the enzyme myrosinase (in plant cells or gut bacteria) cleaves glucoraphanin (a glucosinolate). SFN activates the Nrf2 (nuclear factor erythroid 2-related factor 2) transcription factor by modifying Keap1, allowing Nrf2 to translocate to the nucleus and upregulate >200 cytoprotective genes including: GST (glutathione S-transferase), NQO1, HO-1 (heme oxygenase-1), SOD, catalase, and glutathione synthesis enzymes. SFN also has epigenetic effects: it inhibits DNA methyltransferases (DNMTs) and histone deacetylases (HDACs), which affects gene expression including hTERT (telomerase). At the hTERT promoter, SFN prevents DNA methylation and allows CTCF transcription factor binding, activating telomerase expression. SFN also reduces oxidative stress, inhibits NF-κB, and modulates inflammatory cytokines.
Sulforaphane is one of the most powerful dietary phytochemicals for cancer prevention, detoxification support, and neuroprotection. It upregulates Phase II detoxification enzymes, supporting clearance of carcinogens, estrogen metabolites, and environmental toxins. SFN shows promise in autism (improving behavior and social interaction), schizophrenia, and neurodegenerative diseases. Epigenetic modulation by SFN can reverse aberrant methylation patterns. Optimal sources: broccoli sprouts (highest concentration), lightly steamed broccoli with mustard seeds (provides myrosinase), or sulforaphane supplements (standardized glucoraphanin with active myrosinase).
- Derived from glucoraphanin in cruciferous vegetables via myrosinase
- Broccoli sprouts contain 10-100x more glucoraphanin than mature broccoli
- Activates Nrf2 pathway upregulating >200 cytoprotective genes
- Inhibits DNMTs and HDACs producing epigenetic modifications
- Activates hTERT (telomerase) expression by demethylating promoter
- Induces Phase II detoxification enzymes (GST, NQO1, HO-1)
- Anti-inflammatory via NF-κB inhibition
- Neuroprotective; improves autism symptoms in clinical trials
- Nrf2 — sulforaphane activates Nrf2 transcription factor inducing cytoprotective genes
- cruciferous vegetables — sulforaphane is derived from glucoraphanin in cruciferous vegetables
- broccoli sprouts — highest concentration of glucoraphanin precursor to sulforaphane
- glucosinolates — glucoraphanin is a glucosinolate that produces sulforaphane
- myrosinase — myrosinase enzyme cleaves glucoraphanin to release sulforaphane
- Phase II detoxification — sulforaphane induces Phase II detoxification enzymes
- glutathione — upregulates glutathione synthesis and glutathione S-transferase
- DNMTs — sulforaphane inhibits DNA methyltransferases reversing aberrant methylation
- HDACs — sulforaphane inhibits histone deacetylases promoting gene transcription
- hTERT — sulforaphane demethylates hTERT promoter activating telomerase expression
- telomerase — sulforaphane can upregulate telomerase via epigenetic modifications
- EGCG — works synergistically with EGCG for complementary epigenetic effects
- NF-κB — sulforaphane inhibits NF-κB reducing inflammatory gene expression
- oxidative stress — reduces oxidative stress through Nrf2-mediated antioxidant upregulation
- cancer — powerful cancer prevention through multiple mechanisms (detox, epigenetics, apoptosis)
- autism — clinical trials show SFN improves autism symptoms and social behavior
- neuroprotection — neuroprotective in Alzheimer's, Parkinson's, and traumatic brain injury
- estrogen metabolism — supports Phase II conjugation of estrogen metabolites for clearance
- environmental toxins — enhances detoxification of environmental carcinogens and xenobiotics
- inflammation — reduces chronic inflammation through multiple pathways
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