Iron supplements are often paired with vitamin C based on the idea that vitamin C improves iron absorption. But how well does the evidence support this claim? As part of a Benefits of Glutathione Glutathione Benefits for Gut Health Nikki Yelton RD Glutathionyl Hemoglobin and Its Emerging Role as a Clinical Biomarker of Chronic Oxidative Stress Glutathione deficiency and heart failure: a systematic review of human and animal evidence ScienceDirect