Weight is a good guideline for blood volume in people of average build. This is why we set a minimum weight limit of 7st 12lbs (50 kg) because if more than 13% of blood volume is taken there is more risk of the donor feeling faint after donating.
Not surprisingly, the one factlet most often offered up as revealed truth is wholly false: Your hair and nails do not continue to grow after you die; it's all optical illusion. The sorry fact of the matter is that we dehydrate after dying. Our flesh dries and, in so doing, pulls away from nails and hair.
As your body recovers and hair pigment rebounds, your hair may return to its original color or a color close to your pre-chemo hair. 1  In fact, since hair growth is often slower after chemotherapy, increased pigment may be picked up and your hair may then grow in darker than before chemotherapy.