Does beef blood really have nutritional value? I remember Robinson raving about it in his autobiography. Has this be disproven since then?
Robinson said it was one of the most nutritious things going. I haven't heard of many other fighters drinking it.
They also used to recommend sugary sodas to enhance a child's "energy" and smoking was thought to be a safer alternative to chewing tobacco for ballplayers, and they were encouraged to switch for their health.
Blood and meat are much of a muchness. The Masai in east Africa drink a mixture of blood and milk. No problems.