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pre-bariatric surgery diet

Pre Bariatric Surgery Diet – Essential tips


Bariatric surgery is a transformative path for those who have struggled with obesity and are seeking a lasting solution. However, the success of this intervention depends not only on the surgical procedure but also on the preoperative preparation, especially in terms of diet. This article provides essential guidance on how to prepare diets for bariatric surgery, thereby maximizing the chances of success and minimizing the risks. Learn about the Pre-Bariatric Surgery Diet.

What is Bariatric Surgery and Why is Dietary Preparation Necessary?

Bariatric surgery includes various surgical procedures performed on the stomach or intestines to help with weight loss. It is an option for people with severe obesity when other methods have not worked. Dietary preparation is crucial to reduce liver fat, decrease risk during surgery, and speed recovery.

Principles of the Preoperative Diet for Bariatric Surgery

The preoperative diet focuses on consuming foods low in fat and sugar, high in protein, and enough fiber to keep the digestive system in optimal condition. The objective is to reduce the size of the liver and fat reserves, facilitating the surgical procedure.

Benefits of Following a Specific Diet Before Surgery

Adhering to a specific preoperative diet offers several benefits, including:

Reduction in surgical risk: A smaller liver allows the surgeon to operate more safely (shorter surgical time and greater and quicker patient recovery).

Faster recovery: Good pre-operative nutrition can speed up the post-operative healing process.

Adaptation to future changes: Starting the diet before surgery helps you adapt to long-term dietary and lifestyle changes.

Description of the Preoperative Diet

The preoperative diet typically begins 1 week to a couple of months before surgery (Depending on the patient). It focuses on low-carbohydrate foods, a low-calorie diet with a good supply of protein, and a liquid diet two to three days before surgery.

What Foods to Include?

Lean proteins: Chicken, fish, eggs, and tofu.

Non-starchy vegetables: Spinach, broccoli, and carrots.

Fruits: In moderation, preferably low in sugar such as berries.

Whole grains: Limited amounts of brown rice, quinoa, and oats.

Low-fat dairy: Milk, cheese, and yogurt.

What Foods to Avoid?

High-fat foods: Fatty meats, full-fat dairy products, and oils.

Simple sugars: Sweets, sugary drinks, and desserts.

Refined carbohydrates: White bread, pasta, and white rice.

Alcohol: Avoid completely due to its high-calorie content and effect on the liver.


Low-Calorie Liquid Diet Plan

One week before surgery, a low-calorie liquid diet is recommended. This includes:

Liquid proteins: Protein shakes.

Clear broth: No fat.

Calorie-free drinks: Water, tea, and unsweetened coffee.

Daily Menu Example

Breakfast: Protein shake.

Lunch: Chicken broth with blended vegetables.

Dinner: Protein shake.

Snacks: Sugar-free gelatin, herbal tea.

Nutrition Tips Before Weight Loss Surgery

Planning meals: Helps avoid impulsive decisions.

Stay hydrated: Drink at least 8 glasses of water a day.

Avoid snacking: Focus on scheduled meals and snacks.

Eat slowly: Helps digestion and feelings of satiety.

The Importance of Hydration: Hydration is essential, especially when following a liquid diet. It helps keep the body functioning properly and facilitates weight loss.

Recommended Supplements and Nutritional Care

Your doctor may recommend vitamin and mineral supplements to ensure adequate nutrition. These may include vitamin B12, iron, calcium and vitamin D.

Psychological Preparation and Support

Preparation for bariatric surgery also includes psychological support. It is important to address emotional eating habits and prepare for long-term lifestyle changes.

Frequently Asked Questions

Can I eat normally again after surgery?

Subsequently, the diet will evolve from liquids to purees and finally to solids, always focusing on proteins and essential nutrients.

Is weight loss permanent?

Bariatric surgery is an effective tool, but weight maintenance depends on permanent changes in diet and lifestyle.


Dietary preparation before bariatric surgery is a fundamental pillar for the success of the procedure. By following these tips and working closely with a healthcare team, patients can maximize their results and begin their journey toward a healthier, more active life.

With the guidance of Dr. Sergio del Hoyo, your bariatric surgery will be safe, fast, and in a beautiful setting like Puerto Vallarta, Mexico. Bariatric surgery not only involves a physical change but also marks the beginning of a new lifestyle. Adequate preparation, both physical and psychological, is essential to address this change with confidence and security.

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