Sulforaphane (Broccoli Sprout Extract)
Nrf2 activator for cellular defense and detoxification
What It Is
Sulforaphane is an isothiocyanate found in cruciferous vegetables — most concentrated in broccoli sprouts (100x more than mature broccoli). It's the most potent natural activator of the Nrf2 pathway, the master regulator of cellular antioxidant defense.
How It Works
Sulforaphane activates Nrf2, which translocates to the nucleus and upregulates ~200 cytoprotective genes including glutathione synthesis, phase II detox enzymes, and anti-inflammatory pathways. It also inhibits NF-kB inflammation signaling.
The Science
Sulforaphane reduces hepatic glucose production and improves glucose control in patients with type 2 diabetes
Science Translational Medicine (2017) · PubMed
Human RCT showing sulforaphane-rich broccoli sprout extract improved fasting glucose in obese type 2 diabetes patients.
Dosage
Supplements: 10–40mg sulforaphane/day (or equivalent glucoraphanin + myrosinase). Whole food: 100g broccoli sprouts daily. Myrosinase enzyme is needed for conversion — some supplements include it.
Safety
Safe as a dietary component. High-dose supplements may cause GI discomfort. Theoretically could interact with thyroid function at very high doses (cruciferous vegetable concern), but clinical significance is minimal.
Skeptic's Corner
Sulforaphane's mechanism (Nrf2 activation) is well-validated, but most anti-aging claims extrapolate from cell culture and animal studies. Human trials exist for blood sugar regulation and detoxification, but aging-specific outcomes are understudied. Growing your own broccoli sprouts is far cheaper than supplements.
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