Chen J, Berry MJ: Selenium and selenoproteins in the brain and brain diseases
The National Institutes of Health confirms its role in reducing oxidative stress (NIH, 2023)
They belong to completely different drug classes, work through different mechanisms, and have different effects on weight, appetite, and cardiovascular health
Here's how glutathione affects overall health, including antioxidant defence, immunological function, detoxification, cellular repair and regeneration, energy production, neurological and cardiovascular health, and ageing and lifespan
doi: 10.3389/fphys.2020.605908 39 ChangW
Look for testing through established analytical methods like HPLC (High-Performance Liquid Chromatography) and Mass Spectrometry