In most states, blood donors must be at least 17 years old, although 16-year-old donors are permitted in some states provided they have parental consent. Blood donors must be in good general health and feel well on the day of the donation. Donors should weigh 110 pounds or more.
There are special weight restrictions for high-school donors and donors under age 18, depending on gender and height. All donors must show proof of age via a primary form of identification such as a driver’s license or an American Red Cross donor card. RedCrossBlood.org offers a printable permission form for blood donors requiring parental consent.