I buy stew chunks of fresh grass-finished beef in small bags and when I take the chunks out the bag has lots or dark rich blood. I pour the blood into a shot glass and drink a shot every time. The most delicious, rich, salty, amazing drink I have ever had.

I know blood is nutritious and has good amount of calcium, for example wild cats get most of their calcium from fresh blood not bones (most often they leave the bones for the scavengers)...but I don't know the details, nutritional databases do not list fresh grass-fed beef blood as a food (how useless).
Anyone know the nutritional data for this? I'd love to know, from the way it tastes and makes me feel, its very super-duper.
EDIT: I also pretend I am a vampire when I do this, its fun, lol