Swisse Ultiboost Iron + Probiotic is a premium quality formula containing 20 mg of iron, 16.5 mg of vitamin C and 2 Billion CFU of Bacillus coagulans. Gentle On Stomach: Iron amino acid chelate is a low-constipation, low-nausea form of iron that’s gentle on the stomach and helps prevent dietary iron deficiency. Tiredness & Fatigue Relief: Iron helps relieve tiredness and fatigue. Iron Absorption: Vitamin C supports absorption of dietary iron. Fridge Free: Bacillus coagulans is a convenient fridge-free probiotic.