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All dairy cows create milk that is a good source of protein and milk proteins come in two types - casein and whey.
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Casein comprises about 80% of the protein in milk (6.5g per 1 cup serving)
There are three different types of casein proteins - alpha, kappa and beta-caseins.
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Beta-caseins comprise about 35% of the casein protein in milk (2.5g per 1 cup serving)
There are two major types of beta-caseins, and one of these types is called a2 beta-casein.
In the same way that people differ in their hair and eye color, cows have different traits that affect the balance of beta-caseins they produce in their milk. For example, several studies have shown that Holsteins, the cow used on most U.S. dairy farms to produce milk, differ naturally in the traits that determine the balance of beta-casein protein in their milk.
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About one-fourth of the Holstein breed have traits for the a2 beta-casein, but do not carry the traits for the other major from of beta-casein.
These Holstein cows that produce milk containing predominantly the a2 type of beta-casein are identified, segregated and milked to produce a2 Milk™.
a2 beta-casein and the other major type of beta-casein in milk are constructed from 209 amino acid units which are strung together in a common sequence to form a chain, with one key distinction in the 67th amino acid
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In the case of a2 beta-casein, the 67th amino acid in the chain is “Proline,” in contrast to “Histidine,” the amino acid in the corresponding location in the other major type of beta-casein.
Owing to this small structural difference in the amino-acid chain of the a2 beta-casein protein, a2 can digest differently than the other beta-casein proteins that may be found in milk.
This distinction also allows us to test and certify that at least 99% of the beta-casein present in a2 Milk™ is the a2 type of beta-casein.
Click the image below to enlarge.
Exclusively at Hy-Vee!
Original Foods a2 Milk™ is available exclusively at over 200 fine Hy-Vee food and drug stores. Store locations can be found at www.Hy-Vee.com.
Source Verified
Unlike many other brands, The Original Foods Company a2 Milk™ is not a combination of milks from multiple farms.
Their a2 Milk™ is sourced exclusively from a carefully selected a2 herd at the Prairieland Dairy Farm in Firth, NE.
Produced Naturally
Milk as it was intended to be, produced without using rbST†, other artificial hormones or sub-therapeutic antibiotics.
† FDA states no significant difference has been shown between milk derived from rbST-treated and non-rbST treated cows.