Salamander Blood (Halloween ‘13 special)
According to J.K.Rowling, adding the blood of the magical salamander to powdered griffin claw creates a Strengthening Solution that also has healing and rejuvenating properties.
Actually this is frog blood. Amphibians, birds and reptiles all have creepy nucleated red blood cells. These are different from our super efficient oxygen carrying red cells which of course lack a nucleus (to make more room for hemoglobin). One downside to this is that our enucleated red cells do not last as long post-production as those of our slimy, winged and scaly pals. Hence the numerous amounts of red marrow we have within our bones - a good source of stem cells to ensure our erythrocyte numbers are maintained.