Extensive HA, Unflavored Powder, 400 g (14.1 oz.) canister. 1,920 calories per canister. Extensive HA (Hypoallergenic) is the only formula made with 100% whey protein extensively hydrolyzed and probiotic B. lactis. It is a complete source of nutrition for the dietary management of infants with cows milk protein allergy (CMPA).