Its about using a known anti-inflammatory effect of these drugs at the lowest dose that meaningfully improves disease control
Specifically, it has been observed to lower triglycerides and increase HDL-C in research subjects
Or to help lose weight in adults with an elevated BMI

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

Proks P, de Wet H, Ashcroft FM
Commercial kits for detection of glycogen, insulin, total cholesterol (TC), triglycerides (TGs), GIP, and GLP-1 were purchased from Nanjing Jiancheng Bioengineering Institute (Nanjing, China)