RESEARCH MONOGRAPH · KDC-MN-190

Sulforaphane

May 9, 2026 Kodiac biolabs Research Revised May 30, 2026 2 min read

Our opinion on this compound

74/100

Real NRF2 activator with a precursor problem and a stability problem that vendors keep ignoring

Sulforaphane is the most studied isothiocyanate in the NRF2 literature for a reason. Single-digit micromolar exposure produces meaningful KEAP1-NRF2 pathway activation in essentially every cell type tested, the downstream phase II detox enzyme induction is reproducible across labs, and the Jed Fahey / Paul Talalay body of work at Johns Hopkins is one of the more careful pharmacology programs in the natural-product space. There's actual translatability here, not just in vitro fantasy.

The catch is that sulforaphane itself is a pain to source. The intact molecule is unstable, especially at room temperature and in the presence of moisture, so what most vendors sell is either glucoraphanin (the inactive precursor that requires myrosinase activation in the gut) or a freshly-stabilized sulforaphane prep that may or may not actually contain what's on the label. Glucoraphanin-to-sulforaphane conversion depends on intact myrosinase enzyme, which is destroyed by cooking and varies wildly between people based on gut microbiota. Studies that use broccoli sprout extract without controlling for myrosinase activity end up with 10x variation in plasma sulforaphane and call it failed replication.

The clinical signal is most interesting in three places: autism-related behavioral measures (the Singh / Talalay trials, controversial but real), schizophrenia adjunct trials with small but interpretable effects, and air pollution / benzene-detox endpoints in Chinese cohorts. Cancer chemoprevention is the marquee claim and the human data is honestly weaker than the marketing suggests, mostly because the relevant exposure windows are decades.

What we like: NRF2 activation is a legitimately useful research tool and sulforaphane is the cleanest small-molecule activator we have access to at supplement-grade purity. What we dont like: half the products on the market are either glucoraphanin mislabeled as sulforaphane, or stabilized formulations with no chromatogram backing the stated content. Cold-chain matters. So does third-party HPLC, not the COA the manufacturer wrote themselves.

Worth keeping in rotation for NRF2 research? absolutely, just spec the material carefully and dont assume oral bioavailability without measuring it. The molecule deserves better than the supplement industry currently provides.

Evidence: 70
Mechanism: 85
Reliability: 65
Safety: 88
Sourcing: 60
Value: 70
Signal: 72
Staying power: 80

Plain-language summary Intrigue 72 / 100

Sulforaphane is an isothiocyanate from broccoli sprouts that potently activates Nrf2, the master regulator of antioxidant gene expression. Has shown chemopreventive effects in cancer research and is being studied for autism spectrum disorder. Not stocked by Kodiac. This monograph is provided for research and educational reference.

Intrigue 0–100 blends mechanism novelty, evidence strength, and translational potential. Kodiac editorial, not peer-reviewed.

Isothiocyanate / NRF2 activator

An isothiocyanate produced from glucoraphanin in cruciferous vegetables, characterized as the most potent natural NRF2 pathway activator.

Abstract

Sulforaphane (CAS 4478-93-7; molecular formula C6H11NOS2; molecular weight 177.29) is an isothiocyanate produced by hydrolysis of glucoraphanin (a glucosinolate) by myrosinase in cruciferous vegetables (broccoli, especially broccoli sprouts; cabbage; kale). The compound is the most potent natural activator of the NRF2 transcription factor pathway, which regulates expression of phase 2 detoxification enzymes and antioxidant defenses (glutathione, NQO1, HO-1). Sulforaphane has been studied for cancer prevention, autism spectrum disorder (modest improvements in behavioral measures in small Phase 2 trials), and oxidative stress. The compound is unstable; commercial preparations include broccoli sprout extracts standardized to glucoraphanin + active myrosinase. Reported research dose ranges in the literature are described in the source publications.

Mechanism of action

Most potent natural NRF2 activator; induces phase 2 detoxification enzymes and antioxidant defenses.

Reported research dose ranges

Reported research dose ranges in the literature.

References

Singh K, et al. Sulforaphane treatment of autism spectrum disorder. PNAS 2014.

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KDC-MN-190

The full reference document is provided strictly for research use only. It reports research dose ranges from the published literature, not instructions for use in humans or animals.

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FOR RESEARCH USE ONLY. Not for medical, diagnostic, or therapeutic purposes. Not for human consumption. All information is provided for research and educational purposes only.

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Sulforaphane

Abstract

Mechanism of action

Reported research dose ranges

References

Read the full monograph

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Abstract

Mechanism of action

Reported research dose ranges

References

Read the full monograph

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