When selecting an iron supplement, it’s essential to look beyond just the elemental iron amount. Absorption rates, ingredient quality, and your personal tolerance play a huge role in what will work best for you. For instance, heme iron supplements tend to be gentler on the stomach than some non-heme forms like ferrous sulfate, which can cause digestive discomfort. Additionally, supplements combined with vitamin C can improve absorption, making your daily dose more effective.

Consider also the form of supplementation—capsules, tablets, liquids, or gummies—each offers different convenience and bioavailability factors. It’s wise to check the label for possible allergens or additives you might want to avoid, such as artificial colors or sweeteners. Below is a quick guide to help you identify key elements on supplement labels:

  • Elemental Iron %: Indicates the actual iron content your body absorbs.
  • Additional Nutrients: Vitamin C, folate, or B12 enhance absorption and boost hematologic health.
  • Formulation Type: Ferrous bisglycinate (gentle), ferrous fumarate (standard), or heme iron (natural).
  • Potential Irritants: Gluten, lactose, or dyes that could trigger sensitivity.
TypeGentle on StomachCommon DoseAbsorption Rate
Ferrous BisglycinateYes25-30 mgHigh
Ferrous SulfateNo65 mgModerate
Heme Iron PolypeptideYes11 mgVery High
Ferrous FumarateSometimes33 mgModerate