Twice, but one pint of blood is generated every month. Don't push donation without proper diet.
8 times. There are 8 pints in a gallon, and per the average donation a person usually gives a single pint of blood. If a person donates 8 times that would equal 8 pints, which is one gallon.
When a person donates blood, many tests are run on that blood, B12 is not one of those, so yes, a person with a B12 deficiency may be able to donate. However, It would not be advisable to do so as it may exacerbate some symptoms this person may have such as tiredness and fatigue.
You donate roughly 1 quart when you donate blood.Edit 3/18/2013 20:19: The answer above is false. You donate a pint of blood (0.5 quarts).
In general, FDA and AABB guidelines allow volunteer blood donations if someone is 17 years of age or older, weigh 100 lbs or more, and are in good health. Specific eligibility questions must be answered, a mini-physical preformed, and the prospective donor must have a blood count of 38% or higher (or a hemoglobin of 12.5 or greater). Specific criteria may be found at AABB.org.
As of 2012, in the United States, and many "civilized" countries, gay men are banned from donating blood, even if they are healthy. Lesbians are not banned.
It's a place where many people can donate blood.
Yes, gay men can donate blood, but there are restrictions in place in many countries. In the United States, gay men can donate blood if they have not had sex with another man in the past three months.
10 times a week
56 days.
1
Yes, gay people are able to donate blood in many countries, but there may be restrictions based on sexual activity and other factors.
Donated blood saves many lives. You donate blood so other people can benefit from it if they (i) have lost blood in an injury, (ii) have a disorder that requires blood replenishing, (iii) have to undergo a major surgery in which blood is to be given. It can also be used for testing.