Restrictive techniques: in which there is a reduction in the size of the stomach, leading to a decrease in food intake.
This group includes: vertical gastrectomy, adjustable gastric band y gastric pacemaker.

Malabsorptive techniques: in which a part of the small intestine is crossed, reducing the circulation of ingested food and thus decreasing the absorption of nutrients (carbohydrates, fats, proteins, vitamins and minerals).
This group includes: biliopancreatic diversion, SADIS y duodenal crossover.

Mixed techniques: a reduction in the size of the stomach (not as noticeable as in restrictive techniques) and a crossing of part of the small intestine (smaller than in malabsorptive techniques), which leads to a reduction in the amount of food ingested and a decrease in the absorption of nutrients (carbohydrates, fats, proteins, vitamins and minerals).
This group includes: Roux-en-Y gastric bypass (RYGB) y single-anastomosis gastric bypass (BAGUA).

Like positive aspectsthey emphasize:
- Significant and sustained weight loss.
- Improvement of diseases associated with obesity: diabetes, dyslipidemia, hypertension, etc.
- Improved quality of life.

Like negative aspectsThe most important nutritional products are:
- Deficiencies of some vitamins (vitamin D and B12, mainly).
- Deficiencies of some minerals (mainly iron and calcium).
- Protein deficiencies.

After bariatric surgery, it is not possible to ingest the sufficient amount of vitamins, minerals and proteins that our body needs through food.

This is due to two reasons:
New situation of the digestive system (reduction of the size of the stomach, reduction of absorption, etc.).
2. Inadequate intake of these nutrients through food.
These low levels of vitamins and minerals not only occur in the first months after surgery, this situation is maintained over time, because your digestive system has been modified after surgery, and these changes are forever.

For this reason, it is necessary to take a specific nutritional supplement with the vitamins and minerals you need after bariatric surgery. Using a non-specific polyvitamin will not provide you with all the vitamins and minerals you need, which can lead to health problems related to these nutritional deficiencies.

Vitamins and minerals are essential nutrients for our body, we are not able to "manufacture" them, we have to ingest them through food or nutritional supplements. Vitamins and minerals are necessary for all our body cells to function properly. Vitamins and minerals are necessary for all the cells in our body to function properly. If we do not ingest enough of them, our body can become ill.

After bariatric surgery, it is not possible to ingest the sufficient amount of protein that our body needs through food.

This is due to two reasons:
New situation of the digestive system (reduction of the size of the stomach, reduction of absorption, etc.).
2. Inadequate intake of protein through food.

This low protein intake not only occurs in the first months after surgery, this situation can be maintained over time, because your digestive system has been modified after surgery, and these changes are forever.

Therefore, if protein intake through food is not enough, it is necessary that, if you take a protein module to help you ingest the full amount of protein you need.
Proteins are a very important nutrient for the organism, because they are part of all our body cells, muscles, organs, etc.

After surgery it is important that you ingest enough protein so that your body can be in perfect condition and you can do all the activities you propose. If we do not ingest enough protein, our body can become ill.