Iron is an important component of hemoglobin in red blood cells and myoglobin in muscle cells where it is required for oxygen and carbon dioxide transport. Pure Encapsulations Iron liquid contains SunActive® Fe, a micronized water-soluble form of iron with high bioavailability. Research indicates SunActive® Fe iron pyrophosphate bioavailability is similar to ferrous sulfate. In a 16-week randomized, double-blind, placebo-controlled study involving 122 women, supplementation promoted healthy iron status, including hemoglobin, ferritin, and transferrin saturation. A blend of cranberry and blueberry fruit extracts offers antioxidant protection and synergistic microvascular support.