Your question: Does the cooking lower the mineral content of the beans? Does the cooking alter the protein (to bad) of the dry beans.
Many thanks,
Answer: No, cooking does not Lower the Mineral content as long as you keep and eat the Juices that come out, because the juices may contain many Minerals in them, which the body can easily utilize !
And cooking may Improve the Protein in the beans?
Please review this post about how to Best fix the dried Beans: