Can You Donate Blood If You Have Diabetes?
Medically reviewed by Lauren Okafor | MD, The Frank H Netter MD School of Medicine, Loyola University Medical Center on August 22nd, 2026.
Yes, people with diabetes can donate blood if their condition is well-controlled. The American Red Cross allows diabetic donors as long as their blood sugar levels are stable and they're not experiencing complications. You must wait at least 4 weeks after starting insulin before donating, and your hemoglobin A1C should be under 7% for optimal eligibility. Blood banks will check your current glucose level before donation, typically requiring it to be between 80-180 mg/dL. However, you cannot donate if you've ever used bovine insulin from the United Kingdom due to mad cow disease concerns. Most diabetics on oral medications or well-managed insulin regimens can donate every 56 days, the same as non-diabetic donors.
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