An argument that non-anemic women should choose plant-based sources of iron, and not supplement during pregnancy.
Check out these videos for more on dietary supplements:
Heavy Metals in Protein Powder Supplements
Some Dietary Supplements May Be More Than a Waste of Money
Risk Associated With Iron Supplements
Dietary Supplement Snake Oil
And check out my other videos on pregnancy.
Also see my associated blog post: How to Enhance Mineral Absorption.