Glutathione is a small peptide molecule made up of three amino acids: cysteine, glutamic acid, and glycine
Selenium is available in several forms, such as Se salts (e.g., sodium selenite), Se-enriched yeast, and organic Se compounds (e.g., Selenomethionine (SeMet)) [105]
Second, increased understanding of the gut-blood barrier and oral bioavailability limitations has driven consumers toward more direct delivery methods
Statistical analyses were performed in RStudio using packages with ggpubr (48), FSA (49), lmerTest (50), emmeans (51), and base functions from the stats package
The most common adverse effects are minor allergies for probiotics and gastrointestinal symptoms for selenium [82]