Can you drink an energy drink before donating blood?
It is best to avoid them. Energy drinks can raise blood pressure and heart rate, which can complicate screening and the draw.
There is no formal ban on energy drinks, but blood centers advise against them on donation day, for good reason.
A typical can combines a high dose of caffeine, taurine, guarana and a lot of sugar. These stimulants can raise your blood pressure and heart rate. At screening, staff measure exactly those two things, and readings outside the allowed range can lead to a deferral.
Compared with coffee
| Cup of coffee | Energy drink (8 oz can) | |
|---|---|---|
| Caffeine | 80 to 100 mg | 80 to 150 mg |
| Other stimulants | None | Taurine, guarana |
| Effect on blood pressure | Mild | Can be greater |
The issue is the combination. Coffee with a meal is fine. An energy drink on an empty stomach is a different story.
What to drink instead
- Water, with an extra 16 oz or more
- Juice
- Coffee or tea with a real meal
If you already had one and still want to donate, tell the screener. They will check your vitals and decide.
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.