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Nutritional Requirements

By

Adrienne Youdim

, MD, David Geffen School of Medicine at UCLA

Last full review/revision Dec 2021| Content last modified Dec 2021
CLICK HERE FOR THE PROFESSONAL VERSION

General guidelines for a healthy diet have been developed even though daily nutritional requirements, including those for essential nutrients, vary depending on age, sex, height, weight, physical activity, and the rate at which the body burns calories (metabolic rate). Recommended dietary allowances for protein Proteins Carbohydrates, proteins, and fats are the main types of macronutrients in food (nutrients that are required daily in large quantities). They supply 90% of the dry weight of the diet and 100%... read more , vitamins Vitamins Vitamins are a vital part of a healthy diet. The recommended dietary allowance (RDA)—the amount most healthy people need each day to remain healthy—has been determined for most vitamins. A safe... read more , and minerals Minerals Minerals are necessary for the normal functioning of the body’s cells. The body needs relatively large quantities of Calcium Chloride Magnesium Phosphate read more are periodically published by The Food and Nutrition Board of the National Academy of Sciences–National Research Council and the U.S. Department of Agriculture. These allowances are intended to meet the needs of healthy people.

The U.S. Department of Agriculture also publishes MyPlate, a web site that helps people develop a healthy eating style and make healthy food choices that suit their individual needs.

In general, authorities recommend that

More Information

The following English-language resources may be useful. Please note that THE MANUAL is not responsible for the content of these resources.

  • Dietary Guidelines for Americans 2020-2025, 9th edition: U.S. Department of Agriculture (USDA) and U.S. Department of Health and Human Services nutrition recommendations by life stage, from birth through older adulthood

  • MyPlate Plan: USDA's food guidance system promoting a healthy eating routine with a variety of fruits, vegetables, grains, protein foods, and dairy and fortified soy alternatives

NOTE: This is the Consumer Version. DOCTORS: CLICK HERE FOR THE PROFESSONAL VERSION
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Thiamin
Thiamin, vitamin B1, is widely available in common foods. This vitamin is essential for metabolism of carbohydrates, proteins, and fats, as well as for normal nerve and heart function. Which of the following is NOT a potential cause of thiamin deficiency?
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