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Bariatric surgery: learn about the nutritional phases of the post-operative period

post-operative nutritional phases

Understanding the nutritional phases of post-bariatric surgery and how to ensure a balanced diet at each stage contributes to the positive effects of this increasingly accessible procedure in Brazil. According to the Brazilian Society of Bariatric and Metabolic Surgery (SBCBM), more than 100,000 surgeries of this type were carried out in the country in 2016.

Another important aspect in the process of losing weight after bariatric surgery is the support of doctors, nutritionists, psychologists and other health professionals. In addition, it is a time of change in the body and in the routine and the support of family and friends is also necessary.

Now, understand the phases of post-bariatric surgerydivided into five specific diets, one for each stage of recovery.

Phase 1

Clear Liquid Diet

The main aim of this phase is to hydrate and re-adapt the digestive and absorptive tract after surgery, when there is great sensitivity. Considered a low-calorie diet - on average, 500 kcal/day - the Clear Liquid Diet has very little or no food residue, in order to preserve intestinal rest.

For this reason, a duration of 3 to 10 days is recommended based on the consumption of strained juices (avoiding acidic fruits), teas such as chamomile, lemon balm and fennel, coconut water and some vegetable and meat broths strained after cooking and without fat. It is also recommended to drink between 20 and 50ml at intervals of 10-30 minutes.

Phase 2

Complete Liquid or Creamy Diet

After the period of readaptation of the digestive tract, it is possible to start introducing creamier foods into the diet, but still liquids. In this way, you can guarantee a slightly higher calorie intake without compromising the weight loss process and recovery from bariatric surgery.

In the Complete Liquid Diet, liquidized and strained foods are still necessary and protein supplementation should be prioritized. At this stage, milk, yogurt and soups whipped in a blender begin to be introduced. Jellies are also allowed. This diet should last five to ten days, according to medical or nutritional recommendations.

Phase 3

Pasty diet

It is at this stage that chewing comes back into play and more pasty foods begin to be reintroduced. Post-operative patients can consume purees, rice porridge, polenta, mashed vegetables such as pumpkin, chayote and beet, bean broth, lean shredded meats and soft, scrambled or omelette eggs.

The Pasty Diet lasts a little longer and 20 to 30 days are recommended. At this stage, protein-rich foods should be prioritized (on average 75g/day). Despite being more voluminous, it still provides some digestive rest and should be offered to be chewed with little effort.

Phase 4

Soft Diet

In the penultimate stage of the readaptation process, the Soft Diet serves as a preparation for the introduction of a normal diet.

Here the chewing process has been re-established, but care is still needed with food. Food must be well cooked to make it easier to chew, which is why we recommend well-cooked rice and vegetables, soups, lean meats that are tender or shredded, and fruit without peel or pulp.

A period of 20 to 30 days is also recommended before the patient switches to a normal diet.

Phase 5

Normal or General Diet

After the process of resting the digestive tract and the readaptation phases, including the chewing process, the patient is expected to be physically ready to reintroduce a normal diet with all the necessary calorie intake into their routine.

At this stage, protein-rich foods continue to be a priority in the diet and should be consumed between 100g and 200g a day. Solid foods can now be part of the diet, but still with care to observe their texture in order to make the chewing process effective until recovery is complete.

During all these phases, it is important to have medical and nutritional support, guaranteeing the patient a better quality of life and a safe and healthy recovery process.

Protein supplementation after bariatric surgery

Prodiet's BEMMAX can be a great ally in the second phase of the post-operative period. It guarantees the ideal protein intake and consumption of vitamins and minerals to ensure a balanced and healthy recovery, without interfering with the process of readaptation of the digestive and absorptive tract. You can find more information at

And there's more! We recently launched a Quiz to find out how much our readers know about bariatric surgery. How about taking part and testing your knowledge? Did you like the content? Comment and share!


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