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Nat'l Inst. of Health (24)

Metabolic Disorders
Metabolism is the process your body uses to get or make energy from the food you eat. Food is made up of proteins, carbohydrates and fats. Chemicals in your digestive system break the food parts down into sugars and acids, your body's fuel. Your...

Metabolic Syndrome
Not all doctors agree on the definition or cause of metabolic syndrome. The cause might be insulin resistance. Insulin is a hormone your body produces to help you turn sugar from food into energy for your body. If you are insulin resistant, too much...

Nuclear Scans
Nuclear scanning uses radioactive substances to see structures and functions inside your body. Nuclear scans involve a special camera that detects energy coming from the radioactive substance, called a tracer. Before the test, you receive the...

Nutrition
Food provides the energy and nutrients you need to be healthy. Nutrients include proteins, carbohydrates, fats, vitamins, minerals and water.

Nutrition for Seniors
Food provides the energy and nutrients you need to be healthy. Nutrients include proteins, carbohydrates, fats, vitamins, minerals and water.

Radiation Emergencies
Radiation is a type of energy. People are exposed to small amounts of radiation every day from sources such as sunlight.

Radiation Exposure
Radiation is energy that travels in the form of waves or high-speed particles. It occurs naturally in sunlight and sound waves. Man-made radiation is used in X-rays, nuclear weapons, nuclear power plants and cancer treatment.

Radiation Therapy
Radiation is a form of energy released in particles or waves. In high doses, radiation destroys cells or keeps them from multiplying.

Seasonal Affective Disorder
Some people experience a serious mood change when the seasons change. They may sleep too much, have little energy, and crave sweets and starchy foods. They may also feel depressed. Though symptoms can be severe, they usually clear up. This condition...

Thyroid Diseases
Your thyroid is a butterfly-shaped gland in your neck, just above your collarbone. It is one of your endocrine glands, which make hormones. The thyroid helps set your metabolism - how your body gets energy from the foods you eat.