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Gastric bypass diet: What to eat after weight-loss surgery
The gastric bypass diet outlines what you can eat and how much after gastric bypass surgery. Find out ways to establish new eating habits for successful weight loss.
By Mayo Clinic staffWhat you eat, how you eat and how much you eat changes after gastric bypass surgery — surgery that alters the anatomy of your digestive system to promote weight loss.
With your stomach pouch reduced to the size of a walnut or small egg and portions of your small intestine bypassed, you'll need to follow a specific diet after gastric bypass surgery. A registered dietitian can assist you in creating this gastric bypass diet, which includes what type and how much food to eat with each meal and the required consistency and texture of the food. Closely following your gastric bypass diet promotes healthier weight loss and better nutrition.
After surgery: The first three months
You won't be allowed to eat for one to two days after the surgery. Then you consume specific foods according to a diet progression. The purpose of the gastric bypass diet progression is to help in the healing process, minimize stress on surgical sites and allow time for your body to adapt to the new eating patterns.
The following are common phases in the gastric bypass diet progression:
- Liquids — foods and fluids that are liquid or semiliquid at room temperature and contain mostly water, such as broth, juice, milk, strained cream soup and cooked cereal. In most cases, you stay on a liquid diet for one to two days.
- Pureed foods — foods with a consistency of a smooth paste or a thick liquid. Pureed foods contain no distinct pieces. The pureed diet is generally followed for three to four weeks, or as recommended by your dietitian or doctor.
- Soft foods — foods that are tender and easy to chew, such as ground or finely diced meats, canned or soft, fresh fruit, and cooked vegetables. You usually eat soft foods for eight weeks before progressing to eating foods of regular consistency with firmer texture as recommended by your dietitian or doctor.
During the diet progression, you eat many small meals a day and sip liquids slowly throughout the day (not with meals). You might first start with six small meals a day, then progress to four meals and finally, when following a regular diet, decrease to three meals a day. Typically, each meal includes protein-rich foods, such as lean meat, low-fat dairy products (yogurt, cheese) or eggs. Protein is important for maintaining and repairing your body after surgery.
How quickly you move from one step to the next depends on how fast your body adjusts to the change in eating patterns and the texture and consistency of food. People usually start eating regular foods with a firmer texture three months after surgery, but it can occur sooner.
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