Although the reasons for weight and muscle loss in COPD are not completely understood, experts believe that it happens because of a combination of factors. These include:

• Using more energy overall (perhaps due to the increased energy required to breathe).
• Using more energy during physical activity.
• Eating less because of shortness of breath. Shortness of breath may make it difficult to shop for, prepare, and eat foods.
• Using oral corticosteroids, which increase the breakdown of muscle tissue in the body.
• Less interest in food. People who have COPD may be depressed (causing a lack of interest in eating) or may be taking medications that reduce appetite.
• The possibility that COPD may reduce oxygen levels in the blood. This can prevent your body from using food properly.
• COPD affecting your entire body, not just your lungs.

Poor eating habits and nutrition also contribute to weight loss. In older adults, the cost of food and being isolated from others also play a role in poor eating habits.

Weight loss is a concern in COPD because as you lose weight, you lose muscle mass. Muscle loss may result in feeling weaker and makes it more difficult to breathe (the muscles that help you breathe also weaken). Weakness can also lead to a greater chance of infections, such as pneumonia.

About 1 in 4 people with COPD weighs too little for good health, and those who are very underweight, especially those with emphysema, are at higher risk of death than are people with COPD who have a normal weight.¹

If you are beginning to lose weight and muscle mass, you probably need to eat more protein and get more calories. This generally means eating more foods containing fat and protein. Because eating too much fat and targeting certain nutrients (such as protein) may have health risks, always consult with your health professional or a registered dietitian before eating more of these foods to gain weight.

High-calorie, nutritious snacks

Foods that can help you add nutritious calories to your diet include:

• Ice cream.
• Pudding.
• Cheese.
• Granola bars.
• Custard.
• Nachos with cheese.
• Eggs.
• Crackers with peanut butter.
• Bagels with peanut butter or cream cheese.
• Cereal with half and half.
• Popcorn with margarine and parmesan cheese.
• High-calorie nutritional supplements, such as nutrition shakes.

Adding calories to a meal or snack

Adding the following foods to meals or snacks can help you add calories and protein to your diet.

• Add an egg or egg yolk to meat loaf, macaroni and cheese, or similar foods. Be sure the food is cooked after adding the egg.
• Add powdered milk to creamed soups, scrambled eggs, pudding, potatoes, yogurt, and casseroles.
• Add cheese to sandwiches, crackers, casseroles, soups, toast, and pasta.
• Add an extra tablespoon of vegetable or olive oil, mayonnaise, butter, margarine, or sour cream to sandwiches, bread, casseroles, soups, cooked cereals, pasta, potatoes, rice, or vegetables.
• Grind up some nuts and sprinkle the dust on puddings, gravy, mashed potatoes, casseroles, salads, and yogurt.

Adding protein to your diet

Milk, milk products, and meats are high in protein. Try to eat more of these foods, or:

• Add skim milk powder to milk, cold cereals, scrambled eggs, soups, and ground meat.
• Add cheese or peanut butter to snacks.
• Choose desserts that use eggs, such as sponge cake, egg custard, and rice pudding.
• Use nutritional supplements high in protein, such as nutrition shakes.

If you have COPD and are worried about losing weight, see your health professional or a registered dietitian. He or she can help you plan a healthy, high-calorie and high-protein diet.

If you are eating more calories but are continuing to lose weight, see your health professional.

People with COPD often have little interest in food or difficulty eating because of shortness of breath. For tips on eating regularly and eating healthy foods, see:

Eating well when you have COPD.