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Diets
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Wellness Lifestyle

Diets

Adopting a healthy diet through portion control and balanced nutrition is a key strategy for weight loss and the prevention of weight-related diseases.

Health Benefits

If you are overweight or have obesity, losing weight can improve your health. It might also help you prevent weight-related diseases, such as heart disease, diabetes, arthritis, and some cancers. A healthy diet is an important part of a weight-loss program.

Components of a Healthy Diet

A healthy diet:

  • May include fruits, vegetables, whole grains, and fat-free or low-fat milk and milk products
  • May include lean meats, poultry, fish, beans, eggs, and nuts
  • Goes easy on saturated fats, trans fat, cholesterol, salt (sodium), and added sugars

Weight Loss Strategies

The key to losing weight is to burn more calories than you eat and drink. A diet can help you to do this through portion control. There are many different types of diets. Some, like the Mediterranean diet, describe a traditional way of eating from a specific region. Others, like the DASH eating plan or a diet to lower cholesterol, were designed for people who have certain health problems, but they may also help you to lose weight.

There are also fad or crash diets that severely restrict calories or the types of food you are allowed to eat. They may sound promising, but they rarely lead to permanent weight loss. They also may not provide all of the nutrients your body needs. In addition to a diet, adding exercise into your daily life can help you to lose weight.

Frequently Asked Questions

Use visual cues like the hand‑sized plate method: fill half the plate with vegetables, a quarter with lean protein, and a quarter with whole grains or starchy carbs. Measure or weigh foods for the first few weeks to get a sense of serving sizes, then rely on memory and mindful eating to keep portions in check. Which diet plans are safest for long‑term weight loss without compromising nutrition?::Diets that emphasize whole foods, balanced macronutrients, and moderate calorie restriction—such as the Mediterranean, DASH, or plant‑based patterns—are supported by evidence for sustained weight loss and health benefits. Avoid extreme calorie cuts or single‑food diets that can lead to nutrient gaps. Can a fad or crash diet ever be useful for weight loss, and what risks do they pose?::Short‑term weight loss can occur with crash diets, but they often result in rapid regain, muscle loss, and deficiencies in vitamins, minerals, and fiber. They can also disrupt metabolism and increase the risk of eating disorders. How should I combine a diet with exercise to maximize weight loss?::Aim for a moderate calorie deficit (500–750 calories per day) and pair it with at least 150 minutes of moderate aerobic activity per week, plus strength training twice a week. Exercise helps preserve lean muscle mass while you lose fat and boosts overall energy expenditure.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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