Raftermanfmj wrote..

From milk from grass-fed cows

Normal feedlot beef is fed corn, soybean meal, has antibiotics in feed.

Grass fed beef not only tastes better, its got more essential omega-3 fatty acids which are healthier.

The antibiotics in feed lot cattle causes bacteria to evolve to be resistant to them, thus creating the possibility of cross-species transfer to humans even if the antibiotics dont make it into the meat itself.