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HerdingStarted by a grandfather in 1937, this Florida ranch now covers 50,000 acres, feeds local communities and...BreedsKasaragod Kullan set to be Keralam’s third indigenous cattle variety HistoryAncient cattle love affairs: East Asian cattle genomes reveal Tang-Song dynasty mixing and wild bovine introgression HealthState announces public comment period for proposed bovine tuberculosis testing areas ShowsNortheast 4-H Livestock Show celebrates 91 years of tradition ShowsAnnual Webster Parish 4-H Livestock Show set to begin next week BreedsA Leap Forward in Indigenous Breeding: ICAR–IVRI’s Breakthrough in Producing Sahiwal Calves through Advanced Reproductive Technologies BreedsBoyd Beef Cattle to Donate 2027 Angus Foundation Heifer Package BreedsU.P. State Fair dairy show highlights youth, dairy cattle and community BreedsHereford Cattle Society wins landmark court case over breed status HerdingStarted by a grandfather in 1937, this Florida ranch now covers 50,000 acres, feeds local communities and...BreedsKasaragod Kullan set to be Keralam’s third indigenous cattle variety HistoryAncient cattle love affairs: East Asian cattle genomes reveal Tang-Song dynasty mixing and wild bovine introgression HealthState announces public comment period for proposed bovine tuberculosis testing areas ShowsNortheast 4-H Livestock Show celebrates 91 years of tradition ShowsAnnual Webster Parish 4-H Livestock Show set to begin next week BreedsA Leap Forward in Indigenous Breeding: ICAR–IVRI’s Breakthrough in Producing Sahiwal Calves through Advanced Reproductive Technologies BreedsBoyd Beef Cattle to Donate 2027 Angus Foundation Heifer Package BreedsU.P. State Fair dairy show highlights youth, dairy cattle and community BreedsHereford Cattle Society wins landmark court case over breed status

EveryCow

A2 milk

Milk from cows carrying only the A2 form of the protein beta-casein; a description of its protein type.

A tile drawn for this page, not a picture of A2 milk.

Also: A2 beta-casein, A2A2

Beta-casein is one of the main proteins in cow's milk, and it comes in several genetic variants. The two most common, A1 and A2, differ by a single amino acid. Many European dairy herds carry a mix of both, while Indian zebu breeds such as the Gir, Sahiwal and Red Sindhi, and some taurine breeds such as the Guernsey, mostly carry A2. Milk sold as A2 comes from cows tested to carry only the A2 form. Some people believe A2 milk is easier to digest, and it is marketed in several countries on that basis; scientific reviews have not settled the question. The idea has also encouraged interest in native Indian breeds.

See also

Butterfat Genomic selection Zebu Lactation

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