Vitamins and minerals are essential for metabolic functions in the body as they act as coenzymes and cofactors in biochemical reactions. Vitamins like B-complex play a pivotal role in converting food into energy, while minerals such as magnesium and zinc support muscle function and enzyme activity. These nutrients help maintain a balance in metabolism, support cellular health, and facilitate critical processes like oxygen transport and hormone production. Without adequate vitamins and minerals, the body's ability to generate energy efficiently can be compromised, leading to fatigue and decreased physical performance.