Micronutrients are vitamins and minerals your body needs in small amounts, but they play a critical role in how cells function, repair damage, regulate inflammation, and support immune surveillance. Examples include: • vitamin D • B vitamins • iron, zinc, magnesium • selenium and iodine You don’t need large amounts — but you do need adequate, consistent levels. From an oncology perspective, micronutrients matter because emerging research suggests that deficiencies may influence cancer risk over