[Sun focus, November 09, 2011] While your diet can cause illness, it can also be part of an optimal health plan to treat that illness. The fact is that food is medicine. When we look at food as medicine, we can view the Thanksgiving meal as a prescription for good health says Maureen Doran, R.D., L.D., a licensed nutritionist at the Virginia Piper Cancer Institute on the Unity Hospital campus in Fridley.