IRON OUT THE CONFUSION

Iron supplements come in more shapes than you'd think; here's how to cut through the shelf clutter.

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1. Counselling Conundrum: a real question from a patient

2. Concise Conclusion: a straight-forward patient-friendly answer 

3. Quick Wrap-up 

Clearly, there are nuances that may not be captured in this format. The goal here is to provide you with helpful counselling tips which often draw from multiple sources or those which are not commonly accessed by busy healthcare providers serving the community.

Counselling Conundrum: "My doctor said my iron is low and told me to start a supplement. Which one should I get?"

Concise Conclusion: Ferrous gluconate, ferrous sulfate, and ferrous fumarate are all first-line options; any of them will do the job. If you've had stomach issues with iron before or are prone to nausea and constipation, start with gluconate. It has less elemental iron per tablet, which may make it easier on the stomach.

Quick Wrap-up: All three salts are effective for iron deficiency and widely available behind the counter. The difference comes down to elemental iron content: fumarate has the most (~33%), sulfate is in the middle (~20%), and gluconate has the least (~12%). Tailoring initial elemental iron content to blood work is not standard practice, so don't worry about that. Keep in mind that taking iron with food also helps with tolerability at the cost of some absorption.

Dive Deeper

1)  Oral iron supplementation: new formulations, old questions - ScienceDirect

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