Raw grass-fed milk is one of the healthiest things you can consume. It is a good source of protein, A, B, and D vitamins, calcium, copper, phosphorus, and more. It's much easier and tastier to meet your calcium requirements through milk and other dairy than eating a ton of vegetables. So you should go ahead and eat as much dairy as you want, especially if it's grass-fed. Just because people haven't been drinking it for more than a couple thousand years doesn't mean it's unhealthy. Mark sells fish oils and a multi-vitamin but these were certainly never consumed thousands of years ago either.