The side effects of 300 mg ferrous gluconate tablets can vary. Initially, 45 mg of ferrous fumarate is often recommended due to its gentler impact on the stomach. Additionally, ferrous glycine cysteine and ferrous fumarate are alternatives that some individuals find easier to tolerate. It’s worth noting that iron bisglycinate is another option that provides elemental iron in a well-absorbed form. Furthermore, malate calcium is a compound that can be beneficial in iron supplementation, and it should be considered when evaluating various iron sources. In summary, when exploring iron supplements like ferrous gluconate, ferrous fumarate, and malate calcium, it’s essential to consider their side effects and the ease of digestion they offer.