Remedy Routes
    Longevity
    Moderate Evidence

    Oxidative Damage Repair

    Reversed cellular damage from oxidative stress.

    TL;DR

    You cannot supplement your way out of oxidative damage. Endogenous defences (glutathione, the Nrf2 pathway) plus sleep, exercise and plants do the work. High-dose isolated antioxidants can blunt training adaptation and, for vitamin E, have shown harm.

    Why It Matters

    Oxidative stress contributes to ageing, cardiovascular disease, and neurodegeneration — but reactive oxygen species are also essential signalling molecules. Blanket suppression is not the goal. The useful framing is repair and defence capacity: how well your Nrf2-driven enzyme systems respond, not how many antioxidant pills you swallow.

    How to Measure

    Biomarkers

    F2-isoprostanes
    8-OHdG (DNA oxidation)
    Oxidised LDL
    Glutathione ratio (GSH:GSSG)

    Optimization Protocol

    1) Eat 30+ different plants weekly — polyphenol variety outperforms any single isolate. 2) Cruciferous vegetables or sulforaphane 10-40mg/day to activate Nrf2, which upregulates your own antioxidant enzymes. 3) NAC 600-1200mg/day supports glutathione synthesis where need is high. 4) Do not take high-dose vitamin C or E around training — they measurably blunt hypertrophy and mitochondrial adaptation. 5) Stop smoking and moderate alcohol; both dwarf any supplement effect.

    Lifestyle Levers

    • •Plant diversity (30+ per week)
    • •Regular moderate exercise
    • •Sleep
    • •Smoking cessation
    • •Alcohol moderation
    • •Reducing visceral fat

    Supporting Supplements

    Vitamin E

    Vitamin
    Not supported
    Strong Evidence

    High-dose vitamin E supplementation does not reduce disease risk and has been associated with increased mortality and prostate cancer risk.

    Sulforaphane

    Compound
    Likely effective
    Moderate Evidence

    Sulforaphane is the most compelling option because it upregulates your own antioxidant enzymes rather than acting as a one-shot scavenger.

    Vitamin C

    Vitamin
    Mixed evidence
    Moderate Evidence

    Vitamin C corrects deficiency and supports plasma antioxidant capacity, but high doses around training blunt adaptation.

    Astaxanthin

    Compound
    Mixed evidence
    Limited

    Astaxanthin lowers oxidative markers in small trials, but no meaningful clinical outcome has been demonstrated.

    N-Acetyl Cysteine (NAC)

    Amino Acid
    Likely effective
    Moderate Evidence

    NAC reliably raises glutathione, the body's primary intracellular antioxidant, where synthesis is limited.

    Supporting Research

    Frequently Asked Questions

    Should I take a high-dose antioxidant blend?
    No. Large trials of isolated high-dose antioxidants have shown null or harmful results, most notably vitamin E and increased mortality signals.
    Do antioxidants interfere with exercise gains?
    Yes, in doses well above dietary levels taken close to training. Keep vitamin C and E supplements away from workout windows.
    What is the best single lever?
    Not smoking, then plant diversity, then consistent exercise. Sulforaphane is the most interesting supplement because it boosts your own defences rather than substituting for them.

    Typical Timeframe

    Nrf2-mediated enzyme upregulation occurs within days; measurable shifts in oxidation markers take 8-12 weeks.

    Research Summary

    Studies5
    Supplements5
    Evidence
    Moderate Evidence

    My Notes

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    This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.