a2 Milk™ is pure dairy milk, completely natural and additive free. Most dairy milk today contains two main types of beta-casein protein, A2 and A1. Due to the differing structure of these beta-casein protein types, they are digested differently.
Consumption of the A1 type of beta-casein may cause digestive discomfort in some people. Subsequent inflammation combined with intestinal transit delay is directly linked with gastrointestinal symptoms. For some people who experience gastrointestinal discomfort when drinking regular dairy milk, avoiding the A1 type of beta-casein may make the difference. A recent study of 80 Chinese 5-6 year old children with mild-moderate milk discomfort or lactose intolerance (confirmed via a urinary galactose test) suggests that consumption of milk containing only the A2 type of beta-casein over a 5 day period may be linked with better cognitive performance and lower error rates in 5-6 year olds than those who consumed regular milk containing both A1 and A2 beta-casein.