Milk for ph up and secondary nutes?

I have talked to a man who is supposedly a botany student and grows and he has told me that he adds milk to his plants when they start flowering and they love it. I have seen some of his product and it is good stuff. Has anyone ever heard of this? Does it help? If you go here Milk Composition - Minerals
you can see what milk is made of and it looks like it would be good for calcium, phosphorus, and potassium.