MegaFood Blood Builder Liquid Iron Review

Blood Builder Liquid Iron Once Daily is a one-daily liquid iron from MegaFood, sold in a 23 day, 7.7 oz bottle. The page describes it as formulated to support healthy energy levels and to be non-constipating and gentle on the stomach. Each serving delivers 27 mg of iron. The liquid is made with real tart cherry and fruit juice concentrates to give it what the brand calls a unique orchard fruit flavor. MegaFood states that the product is safe for teenage girls, vegans and vegetarians, athletes and recent blood donors, all of whom the page says are at increased risk of being low in iron. The suggested use for ages 4 and up is 3 mL daily, while adults should take 2 teaspoons (10 mL) once daily. The label instructs the user to shake well before use. The page also states that the product is Non-GMO Project Verified, Glyphosate Residue Free, Gluten Free, made without nine common allergens (milk, eggs, peanuts, tree nuts, soy, wheat, fish, shellfish and sesame), and Vegan. MegaFood presents the product as part of its iron range, noting that its exclusive fermented iron form has been clinically shown to increase iron levels without side effects in both the tablet and liquid versions. A linked clinical study PDF for the liquid is provided on the page. The product is offered as a one-time purchase at $24.99, or at a discounted subscription price of $22.49 with Subscribe and Save. Shipping within the US is free over $50, and the page notes that customers earn loyalty points on purchases. The description positions the liquid as a convenient alternative for people who dislike swallowing pills and want an iron supplement that is easy on digestion.

Product Focus: After-Meal Comfort: Fast ReliefAlso covers:Digestion
Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions
Cost per month
$33

Study, Trial or Testing Result Summary

MembersHuman studies

3 of these 14 human studies gave the ingredient by drip, not by mouth.

Iron, the main ingredient here at 8 to 27 milligrams a day depending on the serving, does appear to upper stomach discomfort after meals. Iron taken by mouth often causes it. …

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Review Totals and Summary

Members629 reviews
629 reviews · Wholefoodsmarket 270 · Walmart 166 · MegaFood website 161 · Vitacost 32

This MegaFood Blood Builder Liquid Iron has garnered about 359 ratings across various stores, with a of giving it 4 or 5 stars. Overall, customers generally its effectiveness, of use, and gentle nature compared to other iron supplements. **What it did for buyers** users report in their energy levels and overall -being. …

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Biohacker Summary

MembersWhat our biohacker panel says

Those who it tie it to brain function, thyroid function, muscle, hair, and women who are deficient or menstruating, and they favor testing first, with preferring food sources like red meat and liver for the heme form. One panelist takes 10 milligrams of heme iron, another noticed soreness in training after starting a supplement, and the one who stopped said form or timing his levels after eleven years. …

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RAL Summary

MembersThe tier and why

The tier misreads the iron studies: the meta-analysis found that iron taken by mouth causes indigestion than iron given through a vein, and the other trials only compared iron forms or added a probiotic, so show iron comfort after meals. …

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Digestive system, Blood. Combine with and possible side are for members.

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Supplement Facts

Vitamin B12 3 mcg · Iron 8 mg · Vitamin B12 5 mcg
Supplement Facts
Serving Size about 1/2 tsp (3 mL) / 1 tsp (5 mL) / 2 tsp (10 mL)
Servings Per Container About 76 / About 46 / About 23
Amount Per Serving% Daily Value
Calories (Kids 4 and older, Women over 50, and Men)10
Total Carbohydrate (Kids 4 and older, Women over 50, and Men)2 g1%
Total Sugars (Kids 4 and older, Women over 50, and Men)0 g†
Vitamin B12 (as cyanocobalamin) (Kids 4 and older, Women over 50, and Men)3 mcg125%
Iron (as fermented iron bisglycinate) (Kids 4 and older, Women over 50, and Men)8 mg44%
Calories (Women Ages 14-50)15
Total Carbohydrate (Women Ages 14-50)3 g1%
Total Sugars (Women Ages 14-50)0 g†
Vitamin B12 (as cyanocobalamin) (Women Ages 14-50)5 mcg208%
Iron (as fermented iron bisglycinate) (Women Ages 14-50)14 mg78%
Calories (Pregnant / Lactating Women)30
Total Carbohydrate (Pregnant / Lactating Women)7 g3%
Total Sugars (Pregnant / Lactating Women)1 g†
Vitamin B12 (as cyanocobalamin) (Pregnant / Lactating Women)10 mcg357%
Iron (as fermented iron bisglycinate) (Pregnant / Lactating Women)27 mg100%
* Percent Daily Values are based on a 2,000 calorie diet.
† Daily Value not established.

Other ingredients: Other Ingredients: Organic glycerin, water, apple juice concentrate, pear juice concentrate (Pyrus sp.), tart cherry juice concentrate, natural flavors, beetroot juice concentrate.

Directions: Suggested Use: Shake well before use. Take about 1/2 teaspoon (3 mL) - 1 teaspoon (5 mL) daily, or as directed by your health care provider. Pregnant or lactating women, take 2 teaspoons (10 mL) daily or as directed by your health care provider.

Label source: Megafood · Report a label change

Where to Buy

MegaFood · Walmart · Vitacost
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Our articles on this subject

Graded October 28, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.