Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Astaxanthin | Sulforaphane (Broccoli Seed Extract) | |
|---|---|---|
| Category | Supplements | Supplements |
| Standard Dose | 4-12mg daily | 10-30mg sulforaphane daily (equivalent to ~100-200mg broccoli seed extract standardized to glucoraphanin + myrosinase) |
| Timing | With a fat-containing meal for absorption (fat-soluble carotenoid). | 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 | ongoing |
| Evidence Level | moderate_human | strong_human |
Astaxanthin spans the entire cell membrane bilayer due to its unique molecular structure (polar end groups with a polyene chain), providing antioxidant protection on both the inner and outer membrane surfaces simultaneously — unlike other carotenoids. It quenches singlet oxygen 6000x more effectively than vitamin C, 800x more than CoQ10, and 550x more than vitamin E. It suppresses NF-kB and modulates Nrf2, reduces oxidative damage to mitochondrial membranes, and protects LDL from oxidation. Uniquely, it crosses the blood-retinal barrier and blood-brain barrier.
4-12mg daily
With a fat-containing meal for absorption (fat-soluble carotenoid).
ongoing
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.
10-30mg sulforaphane daily (equivalent to ~100-200mg broccoli seed extract standardized to glucoraphanin + myrosinase)
On empty stomach or with light meal. Myrosinase enzyme required for conversion from glucoraphanin — ensure supplement contains it or add mustard seed powder.
ongoing
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