Drink Up, Slim Down? The Pros & Cons of a Liquid Diet (2024)

One of the many weight loss tricks these days is a liquid diet. The goal is to lower your daily caloric intake by consuming nothing but liquids for one or all of your meals. Over-the-counter weight loss drinks are available for anyone to buy or you can work with your doctor using a medically supervised liquid diet plan. Made popular by Slim Fast, Medifast, Slender Now Thick Shake, HMR, and Optifast, liquid diets claim to provide all the nutrition you need in delicious, filling shakes.

Can you really drink your way thin? Does this sound too good to be true? Read on to find out.

Does a Liquid Diet Work?Drink Up, Slim Down? The Pros & Cons of a Liquid Diet (1)

Weight loss occurs when you burn more calories than you consume. So if you eat and drink fewer calories, you’ll lose weight. Liquid diets play off this formula by drastically reducing the number of calories in your diet. Many liquid diet plans start out at only 400 to 800 calories a day. Replacing meals with high protein shakes eliminates excess calories and fat from your diet and leads to weight loss. When you reduce calories and remove the option of food, you can expect to lose three to four pounds a week.

The route of going liquid isn’t for everyone. You’ve got to be motivated and disciplined to stick with it. As with any diet, the more overweight you are, the more weight you can expect to lose.

Will It Last?

One of the downsides of liquid diets is the slim chance that you’ll be able to keep the weight off long-term. Along with an initial weight loss, a drastic reduction of calories will slow your metabolism, as it forces your body into starvation mode. When this happens, your body holds onto as many calories as possible to conserve energy. Stop your liquid diet and return to eating normal amounts of food, and you can expect to regain all your lost weight. In fact, a depressing 95 percent of people who lose weight with a liquid diet can expect to gain it back.

Dieters will have the most success at keeping weight off long term if they eat some meals liquid and some meals with food. Studies have shown that the liquid diets that are most successful are those that combine meal replacement shakes with regular exercise and classes on lifestyle modifications and weight loss support.

These results aren’t just for liquid diets, but for all diets. There are multiple ways to effectively lose weight, but if you don’t make a long-term change in your eating habits and lifestyle, you can expect to gain the weight back.

Is It Safe?Drink Up, Slim Down? The Pros & Cons of a Liquid Diet (2)

Restricting calories to as few as 400 a day can be dangerous for your health. Those who plan to go this route should be supervised by a medical professional. Remember—too few calories means not enough nutrients. Without adequate nutrition, you may experience dizziness, fatigue, hair loss, electrolyte imbalance, gallstones, constipation, anemia, menstrual problems, loss of muscle mass, and even heart damage. So make sure you’re getting enough calories for energy and nutrition to avoid serious long-term consequences. Also, if you’re pregnant or nursing or have diabetes, you should never go on a liquid diet.

Before beginning a liquid diet, speak with your doctor. Choose a plan that lets you eat one or two normal meals a day and that coaches you along the way with healthy lifestyle habits. Make sure your shakes contain 100 percent of the recommended vitamins and minerals you need. Follow the directions of your liquid diet plan, and aim to lose weight gradually over a 12-week time frame.

If you decide a liquid diet is the best way for you to lose weight, be smart while on it. Approach it as a short-term approach for quick weight loss that jump-starts your healthy lifestyle—not a long-term approach to keeping the pounds off.

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Drink Up, Slim Down? The Pros & Cons of a Liquid Diet (3)

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Drink Up, Slim Down? The Pros & Cons of a Liquid Diet (2024)

FAQs

What are the pros and cons of a liquid diet? ›

A liquid diet provides energy but also puts strain on your digestive system. It's good for short-term weight loss but could also lead to nutrient deficiency. So, to know whether it is good for your health, consult a medical professional or dietician before opting for it.

How much weight can you lose in 2 weeks on a liquid diet? ›

Many liquid diet plans start out at only 400 to 800 calories a day. Replacing meals with high protein shakes eliminates excess calories and fat from your diet and leads to weight loss. When you reduce calories and remove the option of food, you can expect to lose three to four pounds a week.

Does liquid diet reduce belly fat? ›

While a liquid diet may result in a temporary decrease in overall weight , it may not necessarily lead to a reduction in belly fat . This is because liquid diets often lack essential nutrients and can cause the body to go into starvation mode , slowing down metabolism and leading to the preservation of fat stores .

Has anyone lost weight on liquid diet? ›

Results with the OPTIFAST® program have been documented in more than 80 clinical studies. Research has shown that full-formula OPTIFAST® program participants lose an average of 52 pounds and experience improvements in cholesterol, blood sugar and blood pressure levels.

What happens to your stomach on a liquid diet? ›

A clear liquid diet reduces stimulation of the stomach and intestines and provides rest to the digestive system. This is helpful if you are recovering from a digestive disease. One such disease, colorectal cancer, is one of the most common cancers in adults. Your doctor will perform a colonoscopy to diagnose it.

Do you have bowel movements on a liquid diet? ›

You might also have frequent, loose stools on a full liquid diet simply because you are not consuming solids. As you begin to return to a solid food diet, your bowel movements should improve.

Can you lose 10 pounds in 3 days liquid diet? ›

The 3-Day Diet claims dieters can lose up to 10 pounds in three days. Weight loss is possible on The 3 Day Diet, but only because it is very low in calories. And realistically, most of that weight is likely water weight and not fat loss because the diet is so low in carbohydrates.

Can you eat eggs on a liquid diet? ›

Milk Group

Milk may be used in beverages such as eggnog*, milkshakes, malted milk, high protein milk and in cream soups. Eggs and Cheese * Do not use raw eggs, use custard, soft custard, or a commercial egg mixture that is pasteurized. Eggs* in eggnog or custard.

How long can you safely stay on a liquid diet? ›

Malnutrition: It's safe to limit calories and nutrition for short periods, but you risk malnutrition if you stay on the clear liquid diet for more than five days. Healthcare providers will rarely recommend this. If they do, they will prescribe supplements to enhance your nutrition.

What foods should you avoid on a liquid diet? ›

Do not eat any kind of cheese, fruit (fresh, frozen, or canned), meat, and cereals that are not on your "OK" list. Also, do not eat raw or cooked vegetables. And do not eat ice cream or other frozen desserts that have any solids in them or on top, such as nuts, chocolate chips, and cookie pieces.

What can you eat for breakfast on a full liquid diet? ›

Allowed/Recommended: Milk, cocoa, chocolate milk, milk shakes/malts, eggnog, instant breakfast mixes, nutritional supplements such as Kindercal, Pediasure as directed.

How do you satisfy hunger on a liquid diet? ›

Try bone broth or an Ensure Clear nutrition drink. Decaffeinated drinks also have been proven to decrease hunger pangs. Need to chew? Try munching on ice, gummy bears or gelatin.

How much weight did Oprah lose on liquid diet? ›

She added, "In an effort to combat all the shame, I starved myself for nearly five months and then wheeled out that wagon of fat that the internet will never let me forget. And after losing 67 pounds on a liquid diet, the next day, y'all, the very next day I started to gain it back."

Is applesauce a full liquid diet? ›

They're sometimes included in a full liquid diet, or as you get closer to resuming a more normal diet: pureed fruits, such as applesauce. pureed vegetables diluted into soups, such as strained pumpkin puree in a cream soup. cooked cereals, such as oatmeal.

What are the side effects of a liquid diet? ›

Liquid Diet Risks

Missing out on essential nutrients can lead to side effects such as fatigue, dizziness, hair loss, gallstones, and heart damage. Also, if you don't get enough fiber, because you're not eating whole grains, fruits and vegetables, you can get constipated.

What is the risk of a full liquid diet? ›

Risks. It is very difficult to get enough nutrients on a full liquid diet, especially long term. Liquid diets are typically low in vitamin A, iron, vitamin B-12, and thiamine. People who must eat a full liquid diet for extended periods may need to take supplements to prevent nutritional deficits.

What are the disadvantages of a clear liquid diet? ›

A clear liquid diet is often high in carbohydrates. People with diabetes who need to follow a clear liquid diet should work with their doctor to maintain glucose levels. People who follow a clear liquid diet for an extended period or without medical supervision may experience nutritional deficiencies.

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