Donating plasma involves a process called apheresis, where a machine draws your blood, separates out the liquid portion (plasma), and returns the remaining blood cells back to your body. The entire visit takes one to two hours, and most people can donate up to twice per week. Here’s what the process looks like from start to finish.
What You Need to Bring
Your first visit requires three documents: a government-issued ID, proof of address (a driver’s license or utility bill works), and proof of your Social Security number, such as a Social Security card, W-2 form, or paystub. The name on your Social Security document must match your ID exactly. Returning donors typically just need their ID.
Who Can Donate
To donate plasma, you generally need to be at least 18 years old and weigh at least 110 pounds. You’ll need to pass a medical exam and screening that includes testing for hepatitis and HIV. If you’ve gotten a tattoo or piercing within the last four months, you’ll need to wait before donating.
Certain medications can temporarily disqualify you. Blood thinners, the acne drug isotretinoin, and oral HIV prevention medications (PrEP) each carry waiting periods ranging from a few days to several months. If you take medication to treat HIV, that’s a permanent deferral. The key rule: never stop taking a prescribed medication just to become eligible to donate.
How to Prepare the Day Before
What you eat and drink in the 24 hours before donating makes a real difference in how the session goes and how you feel afterward. Drink six to eight cups of water or juice both the day before and the day of your appointment. Focus on foods rich in protein and iron. Avoid heavy, greasy meals, which can cause nausea or lightheadedness during the donation and may even affect the quality of the plasma collected.
The Donation Process, Step by Step
When you arrive at the center, you’ll check in with your documents and complete a health questionnaire. Staff will check your vitals and may run a quick blood test to confirm you’re good to donate that day.
Once you’re cleared, you’ll sit in a reclining chair and a technician will insert a needle into a vein in your arm. Your blood flows through a tube into a machine that spins it to separate the plasma from the red blood cells, white blood cells, and platelets. The machine collects the plasma and then returns everything else back into your body through the same needle. This cycle repeats several times during a single session.
The actual donation typically takes one to two hours, which is noticeably longer than a standard whole blood donation (about 20 minutes). That’s because the machine needs to cycle your blood through multiple times. Most centers have Wi-Fi, TVs, or allow you to use your phone, so bring something to keep yourself occupied.
How Plasma Donation Differs From Blood Donation
With whole blood donation, everything is collected at once: red cells, white cells, platelets, and plasma. Your body then needs to replace all of those components, which is why whole blood donors typically wait eight weeks between donations. Plasma donation only removes the liquid portion of your blood and sends the cells back. Because your body replenishes plasma much faster than it replaces blood cells, you can donate far more frequently.
The FDA allows plasma donations once every two days, with a maximum of twice in any seven-day period. That means regular donors can give plasma roughly 100 times per year, compared to about six times per year for whole blood.
What to Expect Afterward
After the needle is removed and your arm is bandaged, you’ll be asked to stay at the center for about 10 to 15 minutes so staff can make sure you don’t have any unexpected reactions. The most common side effects are lightheadedness and bruising at the needle site. Some people feel more fatigued than usual the next day.
During the donation, a small amount of a substance called citrate may enter your bloodstream. Citrate temporarily lowers calcium levels and can cause tingling in your fingers or toes, or chills. This is usually mild and resolves quickly. Let the staff know if it happens, as they can slow the machine down.
After you leave, focus on rehydrating and eating a solid meal with protein. Give your body time to replenish your plasma before jumping into strenuous activity.
Compensation for Donors
Unlike whole blood donation, which is almost always unpaid, plasma donation centers typically compensate donors. Payment varies by location and by whether you’re a new or returning donor. As an example, CSL Plasma advertises up to $100 for a first donation and up to $750 in the first month for new donors. Many centers also run referral bonuses and loyalty programs. Rates change frequently, so it’s worth comparing centers in your area.
Payment is usually loaded onto a prepaid debit card after each visit. First-time visits tend to pay more than return visits, and some centers offer higher rates on certain days of the week or during seasonal promotions when supply is low.