Why do you enjoy to be 16+ to donate blood?

Why do you enjoy to be 16+ to donate blood?
2 things, younger kids are smaller, generally, and the amount of anticoagulant (stuff that keep the blood from clotting) is premeasured in the pack for a certain amount of blood. if you are smaller (also why the counterbalance limit is 110 lbs), they enjoy to take smaller quantity blood and then here will be too much anticoagulant in the blood.
secondly, younger children hold a slightly different population of cells surrounded by their blood (white cells)...the cells are equal, the percentages are changed a bit. Anyway they are different from adults. Also, at hand are just things, similar to driving, that are adult goings-on.
Its a health concern. They digit if you're under 17 you might not weigh satisfactory, or you may pass out from getting stuck beside a needle. They don't want to be sued.
I guess specifically the rule. My state is 17 w/ID
because they have embezzle out a certain amount of blood, and if you are younger than 16 afterwards taking out that much blood would be too much.
From the Red Cross website:
In-Depth Discussion of Age and Blood Donation
Those younger than age 17 are almost always legalized minors (not yet of the age of majority) who cannot tender consent by themselves to donate blood. (Each state determines its own age of majority, which can be different for different endeavours.)
Persons under the age of 17 may, however, donate blood for their own use, within advance of programmed surgery or in situations where on earth their blood has special medical efficacy for a particular lenient such as a family accomplice.