Magnesium, Sulfur, Iron, Zinc
Start with the big picture
Magnesium acts as a cofactor in many ATP-dependent reactions, and abnormal levels can affect neuromuscular function and cardiac rhythm. Sulfur enters the diet mainly through amino acids and vitamins, contributing to disulfide bonds, sulfation, and synthesis of molecules such as glutathione. Iron is absorbed in forms influenced by dietary factors, stored as ferritin or hemosiderin, and transported by transferrin; its regulation depends importantly on absorption. Iron deficiency and overload have different clinical patterns, while ferritin, TIBC, and transferrin saturation help interpret iron status. Zinc supports enzyme activity and transcription-factor structure. Together, these minerals illustrate how nutrition, biochemical function, and clinical assessment are linked.
What you'll learn
- Describe key biochemical roles and dietary sources of magnesium, sulfur, iron, and zinc.
- Recognize the main clinical features associated with magnesium deficiency and excess.
- Explain factors that influence iron absorption, storage, transport, and regulation.
- Distinguish iron deficiency from overload using characteristic findings and serum indices.
- Identify zinc’s roles in enzymes and transcription factors.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
