Health Library
The Health Library is a collection of health and wellness resources created for learning and accessibility. Select a topic below for related health information or search for a topic in the search bar for more information on other medical conditions.
Nutrients
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The major nutrients—protein, carbohydrate, and fat—provide the body with energy. This energy keeps your heart beating, your brain active, and your muscles working. The energy is measured in calories. Nutrient Function Some sources Protein has 4...
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Food provides energy for physical activity. As you get more active and more fit, and/or as you lose weight, your energy needs (how many calories you need) may change. To get the energy you require, you need to get the proper amount of: Protein, which is needed to maintain and rebuild tissues such as muscles...
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The major nutrients—protein, carbohydrate, and fat—provide the body with energy. This energy keeps your heart beating, your brain active, and your muscles working. The energy is measured in calories. Nutrient Function Some sources Protein has 4...
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Learn how carbohydrate foods raise your blood sugar.
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Foods containing carbohydrate are grouped into the following categories. The carbohydrate content is listed in grams (g). If you eat a larger portion, count it as more than one serving. One serving of carbohydrate has 15 grams of carbohydrate. Of course, not all foods contain exactly 15 grams of carbohydrate...
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Milk, yogurt, and cheese provide a lot of calcium. But there are other foods that have calcium, such as kale, broccoli, and Chinese cabbage. You can also get calcium by eating the soft bones of canned sardines and canned salmon. And calcium is...
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Why is it important to get enough calcium and vitamin D? Your body needs vitamin D to absorb calcium. Calcium keeps your bones and muscles—including your heart—healthy and strong. People who do not get enough calcium and vitamin D throughout life have an increased chance of having thin and brittle bones (...
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The major nutrients—protein, carbohydrate, and fat—provide the body with energy. This energy keeps your heart beating, your brain active, and your muscles working. The energy is measured in calories. Nutrient Function Some sources Protein has 4...
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Fats are nutrients that give you energy. Fats have 9 calories in each gram. Fats help in the absorption of fat-soluble vitamins A, D, E, and K. Fats are either saturated or unsaturated, and most foods with fat have both types. But usually there is more of one kind of fat than the other. Saturated fat...
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Covers why you should cut unhealthy fats (saturated fats and trans fats) from your diet. Looks at healthy fats (polyunsaturated fat and monounsaturated fat). Offers tips for making healthier choices. Links to in-depth info on healthy eating.
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Eating a high-fiber diet is thought to help prevent constipation and its related problems. It may lower blood pressure, improve cholesterol levels, and help control blood sugar levels. And it may help with reaching and staying at a healthy weight....
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How much dietary iron is recommended each day? Recommended daily amounts of iron from food Men Adult 8 mg Women Adult (age 50 and older) 8 mg Adult (ages 19 to 50) 18 mg Pregnant 27 mg Lactating 9 mg to 10 mg Adolescents (ages 9 to 18) Girls 8 mg to...
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Potassium is a mineral in your cells. It helps your nerves and muscles work as they should. The right balance of potassium also keeps your heart beating at a steady rate. A potassium level that is too high or too low can be dangerous. If your levels are high or low, you may need to change the way you eat...
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Why is potassium important? Your body needs potassium to help your muscles contract, maintain fluid balance, and maintain a normal blood pressure. Normal potassium levels in the body help to keep the heart beating regularly. Potassium may help reduce your risk of kidney stones and also bone loss as you age. Healthy...
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The major nutrients—protein, carbohydrate, and fat—provide the body with energy. This energy keeps your heart beating, your brain active, and your muscles working. The energy is measured in calories. Nutrient Function Some sources Protein has 4...
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Protein is made of building blocks called amino acids. Although the human body can make some of these amino acids, nine of them (the essential amino acids) must be obtained from food. Soy foods and animal sources of protein (milk, eggs, meat,...