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A 41-year-old member asked:

How often can you donate blood?

1 doctor answer1 doctor weighed in
Dr. Donald Alves
Emergency Medicine 24 years experience
Whole blood = 56days: it is perfectly safe for healthy adults to donate every 56 days (up to 6 times per year). Each unit can be used to help save up to three people, it is in desperate demand, and you get a cookie!

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A 25-year-old female asked:

How often I should donate blood and in what quantity?

2 doctor answers2 doctors weighed in
Dr. Michael Dugan
Specializes in Hematology
In the US there: Are blood banking standards for the frequency of donation. We also have technology for 2unit donations in selected circumstances. Check with your blood center.
Dr. Donald Alves
Emergency Medicine 24 years experience
In general, for whole blood donation, the US guidelines are not more often than every 56 days, or twice that for "double red" (2-unit) donations at 112 days--which can be more convenient for busy donors, since it is only once a quarter. Blood component donors (plasma/platelet/etc.) can be much more frequent, and timing needs addressed by your local center.
Aug 12, 2013
A 42-year-old member asked:

How often can you donate blood to family?

1 doctor answer1 doctor weighed in
Dr. Ed Friedlander
Pathology 44 years experience
Every eight weeks: This is the usual rule.

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Last updated Nov 10, 2014

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