Nutritional requirements To live, to grow and thrive, humans must take in nutrients from their environment Before birth there are supplied by the mother, but thereafter they must be ingested If too little is provided, the infant will not grow and may become ill, and too much may lead to toxicity or obesity.Nutritional requirements ➢ To live, to grow and thrive, humans must take in nutrients from their environment. Before birth there are supplied by the mother, but thereafter they must be ingested. ➢ If too little is provided, the infant will not grow and may become ill, and too much may lead to toxicity or obesity