Clinical evaluation of glutathione concentrations after consumption of milk containing different subtypes of β-casein: results from a randomized, cross-over clinical trial

This human clinical trial showed that the consumption of cows』 milk containing only the A2 type of beta casein protein compared to conventional milk significantly increased the natural production of antioxidant glutathione (GSH) in individuals with milk intolerance.

GSH is a major antioxidant, preventing all cells from free radical damage and aiding in detoxification. Its concentration within every cell in the body means that its activity is linked to a range of physiological functions including: DNA synthesis, neurological function, prostaglandin synthesis, protein synthesis, immune cell regulation and maintaining the activity of other antioxidants such as Vitamins C and E.
 

This study involved 45 participants who self-reported as milk intolerant in a double blind, randomised crossover study. Analysis of participants blood samples showed that following the consumption of a2 Milk™ serum GSH levels were approximately twice as high as those who had consumed milk containing A1 beta-casein.