Key Requirement
38%+
Minimum hematocrit for most plasma centers
Iron and Plasma Donation
Your iron levels (measured as hematocrit or hemoglobin) are checked at every plasma donation. Low iron is one of the most common reasons donors are deferred.
Why Iron Matters
- Red blood cells: Iron is essential for healthy red blood cells
- Plasma contains some: You lose a small amount with each donation
- Safety: Centers check to ensure donation is safe for you
Iron Requirements for Donation
Hematocrit Levels
| Gender | Minimum | Maximum |
|---|---|---|
| Males | 39% | 54% |
| Females | 38% | 54% |
Hemoglobin Levels
| Gender | Minimum | Maximum |
|---|---|---|
| Males | 13.0 g/dL | 18.0 g/dL |
| Females | 12.5 g/dL | 18.0 g/dL |
What These Numbers Mean
- Hematocrit: Percentage of blood that is red blood cells
- Hemoglobin: Protein in red blood cells that carries oxygen
- Too low: You may be anemic - donation not safe
- Too high: Rare, but also a deferral reason
How to Boost Iron Levels
Short-Term (Days Before)
- Eat iron-rich foods: Red meat, spinach, beans
- Add vitamin C: Helps iron absorption
- Avoid calcium with iron: Calcium blocks absorption
- Cook in cast iron: Adds iron to food
Long-Term (Regular Donors)
- Iron supplements: Talk to doctor about daily iron
- Consistent diet: Maintain iron-rich eating habits
- Track your levels: Know your baseline
- Space donations: Allow full recovery between donations
Best Foods for Iron
Heme Iron (Best Absorbed)
- Red meat: Beef, lamb, venison
- Organ meats: Liver (highest iron)
- Poultry: Dark meat chicken, turkey
- Seafood: Oysters, clams, shrimp
Non-Heme Iron (Plant Sources)
- Leafy greens: Spinach, kale, Swiss chard
- Legumes: Lentils, chickpeas, black beans
- Fortified cereals: Check labels for iron content
- Tofu: Especially firm tofu
- Nuts/seeds: Pumpkin seeds, cashews
Iron Absorption Tips
- Add vitamin C: Orange juice, bell peppers, tomatoes
- Avoid with meals: Coffee, tea, dairy (block absorption)
- Best timing: Eat iron-rich meal night before AND morning of
What If You're Rejected for Low Iron?
Same Day
- Can't retest: Usually must wait until next visit
- Not a ban: Come back another day
- Learn from it: Adjust diet before next attempt
Repeated Deferrals
- See a doctor: May indicate underlying issue
- Consider supplements: With medical guidance
- Space donations: Give body more recovery time
- Underlying conditions: Rule out anemia causes
Special Considerations
Women
- Menstruation: Iron loss during periods
- Higher risk: More likely to have low iron
- Consider timing: May have higher levels mid-cycle
Vegetarians/Vegans
- Non-heme iron: Less easily absorbed
- Pair with vitamin C: Critical for absorption
- May need supplements: Consider iron supplement
Regular Donors
- Cumulative loss: Frequent donation depletes iron over time
- Proactive approach: Don't wait for rejection
- Supplements recommended: Many regular donors take iron
Disclaimer
This is general information, not medical advice. Consult your doctor about iron supplementation and any concerns about your iron levels.
📚 Want the Complete Picture?
This is just one piece of the puzzle. For everything you need to know about plasma donation in 2026—earnings, centers, eligibility, and pro tips—check out our comprehensive resource: