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If you want to lose weight, you’ve probably heard of bariatric surgery. This weight loss surgery has helped countless people finally achieve their weight loss goals. However, surgery is not the only component of achieving long-term success.

After bariatric surgery, patients must commit to making lifestyle changes and likely record them on a Bariatric weight loss app. This includes adopting a new diet. So, what does a bariatric diet consist of? Read on to find out.

Bariatric Diet Phases

A bariatric diet is a low-calorie, high-protein diet that is designed for people who are obese or overweight. The diet is typically divided into two phases: the pre-operative phase and the post-operative phase. 

During the preoperative phase, which can last anywhere from two weeks to six months, patients are expected to lose 10-20% of their body weight. This weight loss is achieved through a combination of dietary changes and increased physical activity. Once the patient reaches their goal weight, they move on to the post-operative phase. 

During the postoperative phase, patients are typically placed on a liquid diet for the first few weeks followed by a gradual introduction of solid foods. Most people can expect to lose 60-80% of their excess body weight within the first year after surgery. While weight loss will vary from person to person, bariatric surgery is generally considered successful if the patient loses and maintains at least 50% of their excess body weight for five years or more. 

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After bariatric surgery, your body will need time to heal. During this healing period, it is important to get enough protein in your diet to help your body recover. Protein also helps you feel full and can help prevent hair loss and muscle loss, which are both common side effects of rapid weight loss. Aim for 60-80 grams of protein per day. Good sources of protein include lean meat, poultry, fish, tofu, legumes, eggs, and dairy. 

Fruits and Vegetables 

Fruits and vegetables are an important part of any healthy diet, but they are especially important for those who have undergone bariatric surgery. Fruits and vegetables are packed with nutrients like vitamins, minerals, and fibre that your body needs to function properly.

Fibre is especially important after bariatric surgery because it helps prevent constipation, a common side effect. Fill half of your plate with fruits and vegetables at each meal.


Carbohydrates should make up a smaller portion of your diet than protein and fat. After bariatric surgery, you will have a smaller stomach pouch which means you won’t be able to eat as much food as you used to. You will also have a shorter digestive tract which means carbohydrates will be absorbed into your system more quickly. This can cause blood sugar spikes and subsequent crashes if you eat too many carbs at once. Good sources of complex carbohydrates include whole grains, starchy vegetables like potatoes and squash, and legumes.


Fat is an essential part of a healthy diet but it is important to choose the right kinds of fat. Saturated fats and trans fats should be avoided as much as possible because they can increase your risk for heart disease and other chronic health conditions. Instead, focus on eating healthy fats like those found in olive oil, avocados, nuts, and seeds. 

To Conclude

If you’re considering bariatric surgery or have already had the procedure done, it’s essential to commit to making lifestyle changes like adopting a healthy diet. A nutritious diet consists of protein, fruits and vegetables, healthy fats, and complex carbohydrates. By following these guidelines, you’ll give yourself the best chance at achieving long-term success after bariatric surgery.

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