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Promising · 6.7/10

GlyNAC (Glycine + N-Acetylcysteine)

Evidence D · early evidence ▲ 14.6% momentum 🥇 First scout open
6.7/ 10

GlyNAC is glycine plus N-acetylcysteine, a precursor stack that rebuilds the body's master antioxidant glutathione. In a 16-week randomized trial of older adults, Kumar 2023 reported insulin resistance fell 64 percent and muscle glutathione rose 164 percent. The effects are large but concentrated in one small-trial research program. Read the full breakdown →

The prediction game

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Ring Promising Momentum 14.6% Updated Jul 20, 2026 How the Index ranks →

Verdict by Nick Urban, host of the High Performance Longevity podcast.

For education only, not medical advice. Supplements, peptides, and protocols can interact with medications and conditions. Talk to a qualified clinician before starting anything here.