Cutting calories is a method people often use to shed extra weight and bump up fat burning.
Calorie-restricted diets are popular because they’re flexible, easy-to-follow, and they let you enjoy your favorite foods — in moderation.
However, some claim that consuming too few calories can be unhealthy, ineffective, and downright dangerous.
This article looks at whether a 1,000-calorie diet can help you lose weight, how to follow it for best results, and why it’s not for everyone.
A 1,000-calorie diet focuses on cutting calories to promote weight loss.
Calories are units that represent the amount of energy your body obtains from the foods and drinks that you consume.
Your body needs a certain number of calories to function — to move, breathe, and pump blood through your veins, for example.
Excess calories are stored as either glycogen — a storage form of carbohydrates — in your muscles or as body fat (1).
A 1,000-calorie diet swaps certain foods with lower-calorie alternatives to create a calorie deficit. This forces your body to burn through its energy stores, increasing fat and weight loss (2).
SUMMARYYour body stores excess calories either as glycogen in your muscles or as body fat. A 1,000-calorie diet reduces calorie intake to promote fat and weight loss.
Research has repeatedly proven that creating a calorie deficit by decreasing calorie consumption is vital to weight loss (3, 4, 5).
Therefore, you’ll very likely lose weight by limiting your calorie intake to just 1,000 calories per day.
However, consuming too few calories may decrease your metabolism over time, which can make it harder to lose and keep off weight in the long run (6).
Additionally, not all calories are created equal. The foods you choose to eat can have different effects on your metabolism, hunger, hormone levels, and overall health.
For instance, eating a lot of protein can decrease appetite, temporarily increase metabolism, and reduce levels of ghrelin, the hormone responsible for stimulating hunger (7, 8, 9).
Meanwhile, a diet high in refined carbs is likely to cause fluctuations in blood sugar, which can contribute to increased hunger levels and overeating (10).
For this reason, while calorie counting can be effective for weight loss, it shouldn’t be the only factor to consider.
For example, eating 1,000 calories a day of low-nutrient junk food could potentially lead to weight loss but may also leave you feeling sluggish, deprived, and hungry.
SUMMARYConsuming 1,000 calories per day can lead to weight loss, but it may decrease your metabolism over time. While creating a calorie deficit is important, it’s not the only factor worth considering.
People favor calorie-restricted diets for their flexibility and ease.
You can enjoy just about any food or drink on a low-calorie diet, as long as it fits within your daily calorie allotment.
Low-calorie diets have also been linked to other health benefits.
For example, animal studies show that short-term calorie restriction may decrease levels of several markers of inflammation (11, 12).
Sustaining high levels of inflammation over time is thought to contribute to the development of chronic conditions like heart disease, diabetes, and cancer (13).
Other research suggests that cutting calories could slow aging and extend longevity (14, 15).
It may also improve heart health by reducing cholesterol levels, blood pressure, and triglycerides — all of which increase heart disease risk (16, 17, 18).
SUMMARYCalorie-restricted diets are flexible and easy to follow. Low-calorie diets also improve heart health, decrease inflammation, and increase longevity.
No foods are off-limits on a 1,000-calorie diet, as long as they fit within your daily calorie allotment.
However, it’s best to prioritize low-calorie, nutrient-rich foods whenever possible to maximize the overall quality of your diet.
Add a good mix of fruits, vegetables, whole grains, and proteins into each meal to ensure you’re getting the micronutrients your body needs.
Try incorporating the following foods and beverages into your 1,000-calorie diet:
- Fruits: apples, blueberries, oranges, peaches, raspberries, and strawberries
- Vegetables: asparagus, broccoli, bell peppers, cauliflower, mushrooms, and tomatoes
- Grains: barley, buckwheat, oats, quinoa, and rice
- Meat: lean cuts of beef, pork, and lamb
- Fish: anchovies, codfish, flounder, salmon, sardines, and tuna.
- Poultry: chicken and turkey
- Eggs and egg whites
- Legumes: beans, chickpeas, lentils, and peas
- Dairy products: low-fat or skim milk, unsweetened yogurt, and low-fat cheese
- Beverages: water, unsweetened tea, black coffee, and nut milks
- Spices: thyme, oregano, cumin, basil, paprika, and turmeric
- Condiments: soy sauce, mustard, salsa, and vinaigrettes
SUMMARYA 1,000-calorie diet should include plenty of nutrient-rich foods, including fruits, vegetables, whole grains, and protein sources.
Though nearly any food can be included as part of a 1,000-calorie diet, it’s recommended that you limit your consumption of high-calorie ingredients.
Processed foods, sweets, and sugary beverages provide a high number of calories with little nutrition.
Try limiting or avoiding these foods while on a 1,000-calorie diet:
- Dairy products: ice cream, sweetened yogurt, pudding, and frozen yogurt
- Condiments: cream cheese, mayonnaise, creamy salad dressings, sugar, and tartar sauce
- Prepared foods: baked goods, breakfast cereals, chips, convenience meals, pizza, and other fast food
- Beverages: alcohol, fruit juice, soda, sports drinks, and sweet teas
- Red meat: high-fat cuts of bacon, beef, pork, and sausage
- Sugary foods: cookies, candies, cakes, pies, and chocolates
- Refined carbs: white bread, pasta, pastries, pancakes, and muffins
- Fried foods: donuts, French fries, mozzarella sticks, and fried chicken
SUMMARYLimit your consumption of high-calorie ingredients, such as processed foods, sweets, and sugary beverages while on a 1,000-calorie diet.