Q. What are the downsides to casein and whey protein?
In order to know more clearly the downside of casein and whey, you would best read The China Study by TC Campbell and Move Over Milk by Dane and Vickie Griffin. In short, casein acts like a carcinogen in the adult human and whey can mimic human proteins, triggering autoimmune reactions, even leading to type 1 diabetes in genetically-susceptible individuals.
While studies outlined in Move over Milk appeared to implicate both casein and whey in type 1 diabetes development in genetically susceptible individuals, in a newer study, Finish researchers looked at 1113 infants with a genetic susceptibility to type 1 diabetes and who were randomly assigned to receive one of three infant formulas during the first 6 months of life whenever breast milk was not available:
- Cow’s milk formula (CMF)
- Whey-based hydrolyzed formula (WHF)
- Whey-based formula free of bovine insulin (insulin-free CMF)
Beta cell autoimmunity was monitored at ages 3,6, and 12 months and then annually until 3 years of age. The results were reported as follows:
- In comparison with ordinary CMF, weaning to an insulin-free CMF reduced the cumulative incidence of autoantibodies by age 3 years in children at genetic risk of type 1 diabetes mellitus.
- The likelihood of finding autoantibodies associated with beta cell autoimmunity was 25% lower in the whey-based hydrolyzed formula group, and 61% lower in the insulin-free whey-based formula when compared with the cow’s milk formula group.
Therefore, it appears that casein is the more likely culprit, helped on in some way by Bovine insulin.