I have and I wouldI was in a very precarious place in life with my 1st child. My mother sliced thinkly and dehydrated my placenta. we then ground it in a special use coffee grinder and put it in capsules so that I could eat it. I know it made a difference in evening out my emotions and replenishing lost nutrients. I wish I could find some research to confirm this. I only know what I feel. i also know of a recent incident where a friend was hemmorhaging quite badly. Pitocin and methergyn were having no effect. Under instruction of the midwife, her mother and father made a drink by putting pieces of placenta along with an assortment of fresh vegetables through their champion juicer. They strained the drink and gave it to her. She drank it down, (because it was so good) and asked for seconds. The bleeding slowed and then stopped almost immediately.
When I think about it I am initially grossed out. When I think deeper I remember that most mammals, even herbivores, eat their placenta. And, as has been said, it is the only organ meat htat can be consumed without something having to give it's life.
Hmmm. A lot to think about.