Those who knock it, say what you want, but liver, deer, beaver, calf or chicken, is high in Iron and increases red blood cells within your body. It is high in purines (which is Uric Acid) and anyone who is prone to gout or kidney stones should watch how much organ meat, protein they take in. I know, I'm a dual transplant patient ('89 kidney/pancreas) and after that, too much protein or organ meat (I love liver and could eat a pound or two at a meal) I must take in moderation.
Oh, the kidneys filters the impurities within the body from the blood.
Never eaten any deer liver, may need to give this one a try and I'm headed out tonight for a 2 day deer hunt!