Brad Stanfield: The Most Important Antioxidant Study I’ve Ever Read

Key Takeaways

• Start taking antioxidant supplements after age 45 when free radicals reach damaging levels (earlier supplementation may blunt beneficial oxidative signaling).
• Combine antioxidants with exercise if you’re over 55 – the meta-analysis shows this combination works better than either intervention alone for muscle function.
• Avoid high-dose antioxidant supplements in youth as they may interfere with exercise benefits and natural oxidative signaling.
• Focus on GlyNAC (glycine + N-acetylcysteine) supplementation for boosting glutathione levels in older adults, based on promising (but small) human trials.

Supplements & Protocols Mentioned

• GlyNAC: Glycine + N-acetylcysteine combo (precursor to glutathione) – effective in older adults but not young
• Vitamin E: 400-800 IU doses used in studies (higher doses associated with increased mortality)
• Vitamin A/C: Avoid high-dose supplements (linked to 16% increased mortality in meta-analysis)

Notable Quotes

“We don’t want to totally eradicate free radicals. What we want is a balance between oxidants and antioxidants.”

Bottom Line

If you’re under 45, get antioxidants from food and avoid supplements; if over 55, consider GlyNAC and combine antioxidant supplements with exercise for optimal muscle function.

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