Induction of phase 2 antioxidant enzymes by broccoli sulforaphane: perspectives in maintaining the antioxidant activity of vitamins a, C, and e.
Level 5 - mechanism / opinion, no new human data
Narrative review of mechanistic pathways and human literature without systematic analysis or original empirical data.
PubMed 22303412 · doi:10.3389/fgene.2012.00007
What was done
The authors reviewed published literature on sulforaphane, an isothiocyanate derived from glucosinolates in cruciferous vegetables like broccoli, focusing on its ability to induce Phase II detoxification and antioxidant enzymes via the KEAP1/Nrf2/ARE pathway, its proposed role in maintaining the redox activity of vitamins A, C, and E, and the impact of host genetics on isothiocyanate metabolism.
What was found
The abstract reports no numerical findings or statistical measures. It describes qualitatively that sulforaphane functions as an indirect antioxidant by upregulating Nrf2-driven phase II and redox-cycling enzymes, which may help maintain cellular redox balance and support the radical-scavenging activity of vitamins A, C, and E.
Why it matters
This review outlines the biochemical mechanism linking cruciferous vegetable intake to cellular defense, specifically illustrating how sulforaphane may indirectly enhance and sustain traditional dietary antioxidants.
Limits
As a narrative review, the paper does not provide primary clinical trial data, systematic risk-of-bias evaluation, or pooled effect estimates. No specific dosages, patient populations, or quantifiable clinical health outcomes are reported in the abstract.
Cited by
- partial Sulforaphane activates the NRF2 pathway, turning on phase II detoxification and promoting the expression of 200 antioxidant genes for up to 72 hours.