Chapter 9: Vitamins & Minerals – Functions & Deficiencies

Vitamins & Minerals – Functions & Deficiencies comprehensively details the pharmacology of essential vitamins and minerals, which function as organic and inorganic micronutrients vital for coenzyme activation and metabolic processes such as growth and tissue repair. Vitamins are categorized based on solubility: fat-soluble vitamins (A, D, E, and K) are stored in the liver and fatty tissues, increasing the potential for toxic accumulation (hypervitaminosis), while water-soluble vitamins (B-complex and C) are readily excreted, necessitating regular dietary intake to prevent deficiency states. Specific vitamin deficiencies result in distinct pathologies, such as night blindness from inadequate Vitamin A, rickets from Vitamin D deficiency, beriberi from Vitamin B1 depletion, pellagra from Vitamin B3 deficiency, and scurvy from lack of Vitamin C. The text also covers essential minerals, including calcium, the most abundant mineral, which requires Vitamin D for proper absorption and is crucial for skeletal structure and blood coagulation pathways, and magnesium, a primary intracellular cation necessary for nerve and muscle function, often utilized as an anticonvulsant in obstetrics. The nursing process focuses heavily on assessing the patient’s nutritional status and medical history to identify potential deficiencies or hypervitaminosis, monitoring for drug interactions (such as calcium chelating with antibiotics or pyridoxine reducing levodopa action), and carefully implementing therapy, especially for parenteral doses of calcium or magnesium, which require meticulous monitoring for severe adverse effects like cardiac dysrhythmias or CNS depression.