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Human nutrition is the combination of essentials required for a person to stay alive and healthy. While on average a person can survive upwards of 40 days without food, human beings require 2,000 calories a day for proper functioning. The problem with the modern American diet is that many people consume more than 2,000 calories on a typical day, and when combined with a sedentary lifestyle, problems such as obesity result.
Nutrients Required for Human Nutrition
A complete research paper on human nutrition will point out that, in the ideal, adequite nutrition for men and women requires seven classes of nutrients:
Some of these, known as macronutrients, are required in greater amounts. Vitamins and minerals, known as micronutrients, are needed in lesser amounts. Macronutrients contribute to human nutrition by providing amino acids, lipids, and energy. Any human diet needs to consist of calories, amino acids, fatty acids, minerals, and vitamins. A lack of vitamins, for example, can result in disease. A complete absence of Vitamin C, for example, results in scurvy.
Due to the recognition of the vital role that human nutrition plays in a healthy lifestyle, careers in the human nutrition field have grown considerably. The need for registered dieticians is expected to grow faster than average for American occupations in the next decade. Programs in human nutrition, offered at universities, teach how nutrients and metabolism in human nutrition promote optimal health.