10 Best Iron Supplements 2025 in the United States

THORNE Ferrasorb offers a comprehensive iron supplement that seems well-suited for adults experiencing iron deficiencies. It provides 36 mg of elemental iron in each capsule using iron bisglycinate, a form known for being well-absorbed and less likely to cause constipation compared to other iron types. The inclusion of vitamin C, vitamin B6, vitamin B12, and folate enhances iron absorption and supports blood health, making it particularly effective for those dealing with symptoms like fatigue or dizziness due to iron deficiency.

The supplement is also gluten-free, a plus for those with dietary restrictions. However, while the addition of these essential nutrients is beneficial, users should be mindful of potential side effects such as gastrointestinal discomfort, which can occur with any iron supplement. Each bottle contains 60 capsules, making it easy to integrate into a daily routine.

THORNE, a trusted brand endorsed by various professional teams and partnered with the Mayo Clinic, adds a layer of credibility to the product. This supplement seems particularly beneficial for adults needing a reliable and gentle iron supplement to boost their iron levels and energy, but it's important to follow dosage recommendations to avoid adverse effects.

The MegaFood Blood Builder is a vegan iron supplement designed to increase iron levels without causing side effects, which makes it a gentle option for those who may experience digestive issues with other iron supplements. It contains 60 tablets, each enriched with additional nutrients such as vitamin C, vitamin B12, and folic acid. These added vitamins help support healthy red blood cell production and improve the absorption rate of iron in the body. The inclusion of beet root is another bonus, contributing to overall health benefits.

The tablets are unflavored, which might be a plus for people who are sensitive to strong tastes in supplements. However, it's important to note that individual responses to supplements can vary, so while many may not experience side effects, others might still have some digestive discomfort. Additionally, for those who require a higher daily dosage of iron, the dosage per tablet in this supplement may require them to take multiple tablets per day, which might not be convenient for everyone.

Despite these minor drawbacks, the MegaFood Blood Builder is a solid choice for those looking for a gentle, nutrient-rich iron supplement.

Garden of Life Vitamin Code Raw Iron is a vegan-friendly iron supplement providing 22mg of iron per capsule, which aligns well with the typical daily needs for many women. It comes in an easy-to-swallow capsule form and includes additional nutrients such as vitamins C, B12, and folate—ingredients known to support iron absorption and overall energy. The supplement also contains probiotics and prebiotics, which are commonly associated with digestive health but may benefit gut health and indirectly support nutrient absorption.

The presence of vitamin C can help improve iron uptake, which is advantageous. Side effects commonly linked to iron supplements, such as stomach upset or constipation, might be reduced here thanks to the probiotics, though individual responses can vary. The supplement is Non-GMO, gluten-free, and made in the USA, enhancing its appeal to those seeking clean labels. The bottle contains 30 capsules, designed for once-daily intake, offering convenient dosage.

This supplement may be a suitable choice for women looking for a gentle, multi-nutrient iron product with added digestive support. Those needing a specific iron type or higher dosage might want to consider other options.