It's formulated with iron amino acid chelate, a low-constipation, low-nausea form of iron that's gentle on the stomach, and also contains vitamin C to support the absorption of dietary iron. Formulated based on scientific evidence, this premium quality supplement also contains 2 billion CFU of Bacillus coagulans, a fridge-free. Contains iron amino acid chelate, a low-constipation, low-nausea form of iron that's gentle on stomach. Helps relieve tiredness and fatigue. Helps prevent dietary iron deficiencies.