Anti-allergy milk powder is divided into, according to the degree of decomposition, amino acid milk powder AAF, deeply hydrolyzed milk powder eHF and partially hydrolyzed milk powder pHF. Among them, AAF and eHF have a therapeutic effect on milk protein allergy, while pHF has a preventive effect on milk allergy. The deep hydrolyzed milk powder is divided into two categories, one is casein-based eHF, and the other is whey-based eHF. Regular formula contains a large amount of casein, which is easy to form casein microgroups, forming clots and precipitates in the stomach, slowing down gastric power and making it difficult to digest. Whey protein is more soluble and easy to digest. The fat components are mainly long-chain triglycerides (LCT) and medium-chain triglycerides (MCT). The intestinal digestive juices and pancreatic lipase hydrolyze MCT faster than LCT. MCT is hydrolyzed by the mucosal lipolytic system, which effectively improves absorption in patients with absorption disorders, MCT increases the osmotic pressure of food, and MCT has poor taste. 1. Casein-based eHF is closer to milk, while whey protein-based eHF is closer to breast milk. 2. Whey protein-based eHF is easier to digest than casein-based eHF 3. Whey protein-based eHF has less bitterness than casein-based eHF AAF Amino Acid Milk Powder (completely hydrolyzed) 1.Germany Comidagen Comidagen German original import free amino acid formula 2.UK Neocate (Newdicia Pharmaceuticals Ltd UK original import 100% free amino acid special formula nutritional powder) 3.USA Mead Johnson Nutramigen AA 4.USA Abbott elecare deeply hydrolyzed milk powder eHF (whey protein-based): 1. Dutch Niobrand Nutrilon Pepti 1&2 2. Japanese Meiji ミルフィ`HP 3. German Merbau Aptamil HA Pre~3 4. American Nestle Alfare Deep Hydrolyzed Milk Powder eHF (casein-based): 1. Dutch Methuselah purple cans Friso hypo-allergeen 1&2 2., Japan Morinaga MA-1 3., Japan Solidago アイクレオHI