Ferrous Gluconate vs. Ferrous Sulfate: What’s the Best Type of Iron Pill to Take? Discover the key differences between ferrous gluconate vs ferrous sulfate, and which is best to take if you have ...

The most common types of iron used in supplements are ferrous sulfate, ferrous fumarate, and ferrous gluconate. Ferrous sulfate is the most commonly used type and is usually the most affordable.

Common types include ferrous sulfate, ferrous gluconate, ferric citrate, and ferric sulfate. Research shows that ferrous iron ...