How Often Can You Donate Plasma?
Jazmin Anderson
| 3 min read
Jazmin Anderson is a 2026 Corporate Communications i...
Key Takeaways
- You can donate plasma up to twice in a seven‑day period, provided the donations are at least 48 hours apart and you return to the same center within six months for the second donation to be used.
- Eligibility requirements include being 18 or older, weighing at least 110 pounds, having no recent tattoos or piercings and passing all screening tests.
- To prepare, eat a protein‑ and iron‑rich meal, stay well‑hydrated, get a full night’s sleep and bring a government‑issued ID and proof of address to the donation site.
Plasma, sometimes referred to as “the gift of life,” is a component of blood used to treat rare chronic conditions such as autoimmune disorders and hemophilia. People with these conditions can live long and productive lives thanks to plasma donations.
According to the U.S. Department of Health and Human Services (DHHS), most plasma donors receive financial reimbursement for their donations and undergo free medical exams and tests to determine eligibility.
Here's some information about the plasma donation process.
What to know about plasma
Plasma makes up about 55% of your blood and carries water, salts and enzymes, according to Stanford Medicine. The main role of plasma is to transport nutrients, hormones, proteins and blood within the body. The blood component also helps remove cellular waste products from the body.
The proteins and antibodies in plasma, along with its clotting factors, make it suitable for the treatment of chronic conditions and medical emergencies.
Who can give plasma
Donor eligibility varies depending on individual facilities, but generally, donors should:
- Be 18 years of age or older
- Weight at least 110 pounds
- Not have gotten any tattoos or piercings within the past four months
- Pass all required screenings and tests
How often can you donate plasma?
According to DHHS, your plasma can only be used after you’ve already given it twice as a safety precaution required by the U.S. Food and Drug Administration (FDA), who regulate plasma donation in the United States. You must return to the same plasma center where you donated within six months to donate again before any of your plasma can be used.
Plasma quickly regenerates within the body. If you hydrate properly, your blood volume can return to normal within 48 hours. Thanks to this, you can give blood twice in seven days, as long as the donations are 48 hours apart.
What to expect during a plasma donation
To make the donation process as smooth as possible, it is a good idea to follow some of these general guidelines by DHHS:
- Eat healthy: Minimize alcohol and caffeine intake and eat a protein- and iron-rich diet in the days before your appointment. Stay hydrated and have a healthy meal or snack a few hours before your visit. Don’t use nicotine within an hour of your appointment.
- Get a good night’s rest: Aim for about eight hours of rest the night before you donate.
- Drink lots of water: Giving plasma reduces your blood volume by about 800 milliliters. Two or three hours before your appointment, consider drinking at least this amount of water to help offset blood volume loss.
- Gather necessary documents: Call the donation center before your visit to confirm what you’ll need, typically a government-issued ID, proof of address and proof of social security.
Before donating, you'll have your vitals checked and give a blood sample. If it’s your first time donating, you'll also have a physical exam.
Once you are approved, the staff will hook you up to a plasmapheresis machine, a specialized device separating plasma from your blood it draws from you and returns the remaining blood to your body. This process should take about an hour.
After donating, consider staying at the plasma center for 10 to 15 minutes as a safety precaution. During this time, rehydrate and only leave once you feel well enough to do so. Keep the bandage on your wound for the next few hours and keep the area clean. Continue to hydrate and eat a small meal after donation.
Photo credit: Getty Images
