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The Blood Matters Blog ·

What to Eat Before Donating Blood

When it comes to a successful blood donation, there are foods to consume — and foods to avoid.

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What to eat before donating blood

You've just booked your blood donation appointment: congratulations! Before you make your way to the donor chair, though, there are a few things to consider about what to eat — and what not to eat — that will help you on your path to saving lives.

Foods to Eat Before Giving Blood

Iron-Rich Foods

Iron plays a critical role in producing hemoglobin, a protein in your blood that carries oxygen. Consuming iron-rich foods helps maintain healthy hemoglobin levels, which are necessary for donating blood.

So in the days leading up to your donation, add any or all of the following to your diet:

  • Red meat (lean cuts)
  • Poultry (like chicken and turkey)
  • Fish (such as salmon and tuna)
  • Leafy greens (spinach, kale, and Swiss chard)
  • Legumes (lentils, chickpeas, and beans)
  • Iron-fortified cereals

Have more questions about iron and blood donation? Check out our recent blog post for information on iron deficiency, strategies for boosting your iron levels, and more.

Vitamin C-Rich Foods

Vitamin C enhances your body’s ability to absorb iron. Pair iron-rich foods with vitamin C sources like oranges, strawberries, tomatoes and broccoli.

Foods with Healthy Fats

Emphasis on healthy! Omega-3 fatty acids and other healthy fats support overall well-being. Snack on foods like nuts (almonds and walnuts), seeds (flaxseeds and chia seeds), and avocados.

Foods to Avoid Before Donating Blood

Fatty and Fried Foods

Foods high in unhealthy fats can make blood samples cloudy and can interfere with testing results. Avoid items like burgers, fries, and pastries on donation day.

High-Calcium Foods (for Whole Blood Donors)

Calcium can interfere with your body’s ability to absorb iron. Limit dairy products like milk, cheese and yogurt on the day of your donation if donating whole blood. Conversely, we encourage our platelet donors to increase their calcium intake prior to their appointment.

Foods to avoid before donating blood

What About Coffee and Alchohol?

"Can I drink coffee before donating blood?" — we get this question from time to time. Because coffee and other caffeinated beverages are diuretics, drinking them excessively before your donation isn't the best idea.

It's also best to avoid alcohol in the 24 hours before your blood donation as it can dehydrate the body and lead to dizziness during or after your donation.

Instead, balance your caffeine intake with plenty of water prior to your appointment to ensure you're properly hydrated.

How Much Water Should You Drink Before Donating Blood?

We recommend drinking an extra 16 ounces of water prior to your appointment. Water is hydrating, helps reduce the risk of low blood pressure and fainting during the donation process, and makes your veins easier to access!

How much water to drink before donating blood

When to Eat Before Donating Blood

  • Timing Matters: Eat a balanced meal 2-3 hours before your donation. This ensures your body has enough energy and nutrients to handle the donation process.
  • Light Snacks: If your appointment is in the morning, have a light but nutrient-dense breakfast, such as whole-grain toast with avocado or a fruit smoothie.
  • Post-Donation: After donating blood, it's common to be offered snacks and drinks to help replenish your energy. Choose options like juice, fruit or a granola bar to boost your recovery.

By paying attention to what you eat before donating blood, you'll not only feel better during the process but also ensure your donation is as impactful as possible. Every drop counts, so prepare wisely and make a difference! Feeling ready?

Schedule your donation using the button below. We can't wait to see you!

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