When can i distribute blood?

i would like to give blood in the adjectives, how old do you have to be? and what are the specifacations?
Answers:
in uk its 17. within are various specifications eg. not taking certain drugs, no recent piercing/tattoo, not pregnant, over 7stone (i think), never received blood transplant. You can find them out on the website (google 'give blood'). Then they test a preview of blood at the centre to make sure you're not anaemic.
at least 16 contained by aus
no drugs medicine
good health
not preggers!

its pretty graceful
go to www.redcross.org
if your american

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