Caitlyn Hartigan discusses iron deficiency, why iron supplementation is essential, importance of serum ferritin, iron overload misconceptions, vitamin D supplementation, genetic factors affecting iron absorption, misconceptions about iron levels, challenges in managing iron levels effectively, importance of individualized healthcare approaches, misconceptions surrounding iron deficiency in pregnancy, taste tests for nutrient deficiencies, interpreting iron panels accurately, relationship between copper and iron, significance of bioavailable iron, link between pica cravings and iron deficiency, remedy through food, navigating financial interests in health industry, benefits of supplements in fighting infections