Setria is a patented, clinically studied form of reduced L-glutathione manufactured by Kyowa Hakko through a proprietary fermentation process — and it has been demonstrated in human trials to raise both blood and tissue glutathione levels when taken orally.
Why Glutathione Form Matters
Glutathione (GSH) is a tripeptide that exists in two forms: reduced (active, capable of donating electrons to neutralize free radicals) and oxidized (inactive, already spent). Only reduced glutathione provides antioxidant protection. Many glutathione supplements use oxidized forms or are degraded during manufacturing. Setria is manufactured specifically in the reduced (L-) form and is verified to maintain stability through shelf life. L-Glutathione uses Setria as its glutathione source.
Clinical Evidence for Oral Absorption
The historical skepticism about oral glutathione centered on the belief that it was completely degraded in the GI tract before absorption. Setria-specific clinical trials have challenged this. A 2015 randomized, double-blind, placebo-controlled study in the European Journal of Nutrition found that Setria at 250mg and 1,000mg daily for 6 months significantly increased blood glutathione levels, reduced oxidative stress markers, and enhanced NK cell cytotoxicity. A separate study demonstrated increased body stores of glutathione after 4 weeks of 500mg daily supplementation.
Who Benefits Most
Adults over 40 (glutathione declines ~10% per decade), people under chronic stress (cortisol increases oxidative demand), athletes (intense exercise generates significant free radical load), anyone with environmental toxin exposure, people taking medications that deplete glutathione (acetaminophen, certain chemotherapy agents), and anyone seeking skin health benefits (glutathione regulates melanin metabolism and protects against UV-induced oxidative damage).
Yes — they're complementary approaches. NAC provides the rate-limiting precursor (cysteine) for your body to produce its own glutathione. Setria provides pre-formed reduced glutathione directly. The combination supports both endogenous production and immediate antioxidant availability.
What dose of Setria is effective?
Clinical studies showing significant blood glutathione increases used 250-1,000mg daily. Benefits were observed at both doses, with higher doses producing larger increases. Most clinical applications use 250-500mg daily for maintenance.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
