Review: Glutathione, bioactive-rich foods and fasting in metabolic health
This review links low reduced glutathione (GSH) to metabolic diseases and reports that bioactive-rich foods can raise GSH in human studies, while fasting effects on GSH remain mixed across protocols and populations. [1]
Automatic summary · not editorially reviewed
The key findings
Diminished GSH levels are consistently reported in obesity, insulin resistance, type 2 diabetes, non-alcoholic fatty liver and cardiovascular diseases. [1]
Human clinical studies indicate that bioactive-rich foods can enhance GSH levels and stimulate GSH-dependent enzyme activity. [1]
Fasting effects on GSH-related antioxidant mechanisms remain heterogeneous across protocols and populations. [1]
The source at a glance
- Study type / format
- Review (abstract only)
- Population / context
- People with metabolic conditions and aging-related metabolic health, as discussed in the review
- Summary based on
- Study abstract
- Original publication
- July 18, 2026
GSH and metabolic disease in this review
The review states that reduced glutathione (GSH) supports antioxidant defense, detoxification, redox signaling and metabolic regulation. Diminished GSH levels are consistently reported in obesity, insulin resistance, type 2 diabetes, non-alcoholic fatty liver and cardiovascular diseases. The authors frame this as an association within a review, not as proof that low GSH causes these conditions.
Supporting source [1]
Bioactive foods and fasting: human evidence
According to the review, human clinical studies indicate that foods rich in bioactive constituents can enhance GSH levels and stimulate GSH-dependent enzyme activity, with the Nrf2/Are signaling pathway as a central mechanistic link. Fasting may promote adaptive redox responses by inducing mild oxidative stress and activating the same mechanism, but effects on GSH-related antioxidant mechanisms remain heterogeneous across fasting protocols and study populations.
Supporting source [1]
Who may respond and why tailoring is proposed
The review concludes that these nutritional and lifestyle interventions show more consistent beneficial effects in people with increased oxidative burden and underlying metabolic dysfunction. It also notes interindividual differences in GSH responses and calls for targeted, tailor-made approaches that account for genetic, epigenetic and lifestyle factors. Targeting GSH is described as a promising strategy, not an established treatment.
Supporting source [1]
How to interpret this
This is an abstract of a review; the full text was not reviewed. No specific study designs, sample sizes, follow-up periods or effect sizes are reported in the abstract, and the described associations do not establish causation.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Vardakas P, Skaperda Z, Nechalioti PM, Makri S, Patouna A, Gkasdrogka M, Karampatzakis T, Kroustalli K, Papageorgiou G, Angeli E, Foulos D, Tekos F, Kouretas D. · europepmc.org · July 18, 2026