The main difference between regular milk and A2 milk is that regular milk contains both A1 and A2 (forms of beta-casein), whereas A2 milk can contain only A2 beta-casein.
According to some studies, A1 milk can trigger certain diseases, while A2 milk is generally beneficial for overall health. While most cows produce a combination of A1 and A2 beta-casein, A2 milk is derived from cows that naturally produce only A2 beta-casein due to a genetic mutation.
Milk is a good source of protein and calcium. Milk proteins are converted into peptides which are then converted into amino acids. However, the science behind how a single amino acid affects human health is not fully understood.
Beta-casomorphin-7 (BCM-7) is an opioid peptide that triggers inflammatory changes in cells and contributes to diabetes or other diseases. It is believed that regular milk (mostly with A1 beta-casein) produces BCM-7 during digestion which may alter gastrointestinal function and increase inflammation in the gut.
However, proline (an amino acid) in A2 milk blocks BCM-7 from entering your body. A2 milk is easier to digest than regular milk and thus safer for the human body
