Abstract: In metabolism and tissue performance, micronutrients play a key role. Sufficient amount of intake is required to maintain tissue function and metabolic processes. In those people who are extremely depleted and the possibility for complications, the clinical benefits of micronutrient supplements are more advantageous in health improvement. Zinc and vitamin A supplements have contributed to lowered diarrhoea and pneumonia in children in developing countries. In slightly malnourished children, there are some indications that micronutrient supplements have cognitive influence. In several diseases, there is strong proof of the benefit of micronutrient supplements. A well-balanced diet tends to support most of the micronutrients.