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Disorders of Nutrition

Overview of Nutrition
Minerals
Nutritional Support

Obesity and the Metabolic Syndrome
Undernutrition
- Undernutrition
Vitamins
- Overview of Vitamins
  - Causes
- Folate
  - Folate Deficiency
  - Folate Excess
- Niacin
- Riboflavin
  - Riboflavin Deficiency
- Thiamin
  - Thiamin Deficiency
    - Causes
    - Symptoms
    - Diagnosis
    - Treatment
- Vitamin A
- Vitamin B 6
  - Vitamin B 6 Deficiency
    - Causes
    - Symptoms
    - Diagnosis
    - Treatment
  - Vitamin B 6 Excess
- Vitamin B 12
  - Vitamin B 12 Deficiency
    - Causes
    - Symptoms
    - Diagnosis
    - Schilling test
    - Endoscopy
    - Prevention
    - Treatment
- Vitamin C
  - Vitamin C Deficiency
    - Causes
    - Symptoms
    - Diagnosis
    - Prevention
    - Treatment
  - Vitamin C Excess
- Vitamin D
  - Vitamin D Deficiency
    - Causes
    - Symptoms
    - Diagnosis
    - Prevention
    - Treatment
  - Vitamin D Excess
- Vitamin E
  - Vitamin E Deficiency
    - Causes
    - Symptoms
    - Diagnosis
    - Treatment
  - Vitamin E Excess
- Vitamin K
  - Vitamin K Deficiency
    - Causes
    - Symptoms
    - Diagnosis
    - Treatment

A healthy diet consists of a variety of nutrients, the substances within food that nourish the body. A healthy diet helps people maintain a desirable body weight and body composition (the percentage of fat and muscle in the body) and to do their daily physical and mental activities. If people do not consume enough nutrients, a nutritional deficiency can result. If people consume too much food, obesity can result.

Disorders of NutritionSections (A-Z)

Minerals

Minerals are necessary for the normal functioning of the body’s cells. The body needs relatively large quantities of

Overview of Minerals
Chromium
Copper
Wilson Disease
Fluoride
Iodine
Iron
Selenium
Zinc

Nutritional Support

Many undernourished people (see Undernutrition ) need additional nutrition (nutritional support). Artificial feeding, which uses commercial nutrient mixtures rather than food, is a common form of nutritional support. Nutritional support is intended to increase the amount of muscle tissue (muscle mass). It usually provides calories as well as vitamins and minerals.

Overview of Nutritional Support
Tube Feeding
Intravenous Feeding
Nutritional Support for People Who Are Dying or Severely Demented

Obesity and the Metabolic Syndrome

Obesity is excess body weight.

Obesity
Bariatric Surgery
Metabolic Syndrome

Overview of Nutrition

Nutrition is the process of consuming, absorbing, and using nutrients needed by the body for growth, development, and maintenance of life.

Overview of Nutrition
Carbohydrates, Proteins, and Fats
Vitamins and Minerals
Fiber
Food Additives and Contaminants
Calories
Nutritional Requirements
Diets

Undernutrition

Undernutrition is a deficiency of calories or of one or more essential nutrients.

Undernutrition

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 upper limit (tolerable upper intake level) has been determined for some vitamins. Intake above this limit increases the risk of a harmful effect (toxicity).

Overview of Vitamins
Folate
Niacin
Riboflavin
Thiamin
Vitamin A
Vitamin B 6
Vitamin B 12
Vitamin C
Vitamin D
Vitamin E
Vitamin K

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Also of Interest

Test your knowledge

Selenium, a mineral, occurs in all tissues. Which of the following disorders may result when a person has a selenium deficiency and an iodine deficiency?

Hair loss Keshan disease Nausea, vomiting, and diarrhea An underactive thyroid gland