The provision of critical nutrients for human life and health is referred to as human nutrition. Nutrition is concerned with food and how it is used by the human body. Food is necessary for life since it provides the body with the fuel it requires to function as well as the building blocks that make up cells, tissues, and organs. As a result, proper diet is critical for good health and disease prevention. A well-balanced diet with necessary nutrients and calories is essential for long-term health. An adequate diet helps to proper development, healthy ageing, and disease resistance. A poor or inappropriate diet, meanwhile, puts people at risk of infection as well as a variety of chronic ailments, such as cancer, type 2 diabetes, and cardiovascular disease. There's a lot of room for new or improved goods, health interventions, and more precise dietary guidelines to promote health through nutrition. However, realizing this promise will necessitate a thorough understanding of how diet affects our health.