One of the reasons goat milk is sought out is it is more digestible. That is because genetically all goats milk is A2/A2 as is most mammal's milk including human. Cow milk has had the A1 protein in it since a genetic mutation more than 1000 years ago. So cows are either A2/A2 (rare), A2/A1, or A1/A1.
There is cows milk out there branded as only A2. We found it and started drinking it about 5 years ago as our years of milking goats (25!) was over. We have no trouble digesting A2 milk, no digestions issues. I have read that most people who think they are lactose intolerant are really reacting to the A1 beta casein protein. Many are never tested.
Many herds through testing and selective breeding have been able to eliminate the A1 genes. I highly recommend people who have trouble with milk check this out.
We also made our own kefir for over 20 years with our goats milk and continue to make it and drink it nearly daily from A2 cows milk.
Great resource website (very old site) is www.kefir.net
Does goat milk have those two substances in it?
Re: cow’s milk:
It’s not the digestive issues, but sinus inflammation and congestion.
When I was a child, I used to get a cold every month and be out for a week and a half each time, such that my lessons needed to be brought home to me.
When my mom took me off milk, the colds subsided to maybe once every three months.
So, I just can’t do anything from the cow except the meat and occasionally butter (and I hardly use butter).