Can you donate blood if you are overweight or obese?
Yes. There is no maximum weight to donate blood in the US, only a minimum (generally 110 lbs). What matters is that you are healthy on the day.
US blood centers set a minimum weight, generally 110 lbs, but not a maximum. Eligibility depends on your overall health and on a few screening checks.
Does BMI matter?
Body mass index is not by itself a reason for deferral. The screener looks at:
- Whether you feel well and healthy
- Your blood pressure and pulse on the day
- Your hemoglobin level
- Any conditions and medications
Related conditions
| Condition | What to expect |
|---|---|
| High blood pressure | OK if treated and within the allowed range on the day |
| Diabetes | Usually OK if well controlled, including with insulin or pills |
| Sleep apnea | Evaluated individually |
Veins
For some donors, veins are harder to find. Staff are experienced with this, though in rare cases a draw may not be possible.
What to do
Make an appointment, answer the health history honestly, and mention any condition or medication. The screening is confidential.
This information is general and does not replace advice from a health professional. Your eligibility is always decided at the donor screening on the day of donation. Rules change, so confirm with the American Red Cross or the blood center where you plan to donate.