There is no standardized timeframe
The subject population was highly diverse in terms of age, socioeconomic status, education, and geographic neighborhoods throughout the Pacific Northwest, although all participants were Caucasian

Sources Antioxidant Deficiencies in Hospitalized Dogs and Cats [State of the Art Lecture] - WSAVA2008 - VIN Effect of glutamine on glutathione kinetics in vivo in dogs - ScienceDirect Selected biomarkers of oxidative stress in healthy Beagle dogs: A preliminary study Reactive oxygen species, glutathione, and vitamin E concentrations in dogs with hemolytic or nonhemolytic anemia - Woolcock - 2020 - Journal of Veterinary Internal Medicine - Wiley Online Library Effect of glutamine on glutathione kinetics in vivo in dogs - ScienceDirect Reduced glutathione accelerates the oxidative damage produced by sodium n-propylthiosulfate, one of the causative agents of onion-induced hemolytic anemia in dogs - ScienceDirect Chronic exposure to xenobiotic pollution leads to significantly higher total glutathione and lower reduced to oxidized glutathione ratio in red blood cells of children with autism - ScienceDirect Toxicity of Glutathione-Binding Metals: A Review of Targets and Mechanisms - PMC Clinical Implications of Persistent Organic Pollutants Epigenetic Mechanisms Antioxidant Effect of a Dietary Supplement Containing Fermentative S-Acetyl-Glutathione and Silybin in Dogs with Liver Disease Relationship between Glutathione and the Immune System Glutathione: A key player in autoimmunity - ScienceDirect Glutathione for Food and Health Applications with Emphasis on Extraction, Identification, and Quantification Methods: A Review Can Dogs Eat Tomatoes

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Efficacy of Cathelicidin LL-37 in an MRSA Wound Infection Mouse Model
Potential Side Effects and Risks In human studies, BPC 157 exhibited no significant side effects, indicating a favorable safety profile