: Generally gentler on the digestive system than sulfate.

: Often considered the "gold standard" for treating deficiency, though it can be harsh on the stomach.

Ferrous fumarate: a medicine to treat iron deficiency anaemia (low ... - NHS

: A chelated form known for excellent absorption and minimal side effects. Key Considerations Before Buying

Yes, you can buy iron tablets over the counter (OTC) at most pharmacies, health stores, and supermarkets without a prescription . Types of OTC Iron Supplements Common forms available without a prescription include:

: Contains a higher percentage of elemental iron per dose compared to other forms.