How to Prepare for Bariatric Surgery with Nutrition in Mind

Preparing for Surgery Starts Before the OR

Bariatric surgery is a powerful tool for long-term weight management and health improvement but success starts long before the procedure. One of the most important steps in preparing your body (and mind) for surgery is following a pre-operative nutrition plan.

A carefully designed pre-op diet doesn’t just set the tone for recovery; it can actually reduce surgical risks, make the procedure safer, and help you build habits that support long-term success.

Why Pre-Op Nutrition Matters

Before surgery, your provider may recommend a specific nutrition plan for several reasons:

• Shrink the liver: A lower-calorie, low-carbohydrate diet helps reduce liver size, improving surgical access and lowering complication risks.

• Stabilize blood sugar: Especially important if you have diabetes or insulin resistance.

• Promote safe weight loss: Losing even a small percentage of body weight before surgery can improve outcomes.

• Create healthy habits: A structured plan helps you transition more smoothly into your post-op lifestyle.

What to Eat (and What to Avoid)

Your pre-op diet will depend on your surgeon’s recommendations, but here are general tips most patients follow:

Focus On:

• Lean proteins (chicken, fish, tofu, eggs)

• Low-carb, non-starchy vegetables (spinach, broccoli, zucchini)

• Clear broths and protein-rich liquids

• Sugar-free drinks and water (stay hydrated!)

• Protein supplements as directed

Avoid:

• Sugary beverages and processed snacks

• Fried or greasy foods

• High-carb staples like bread, pasta, and rice

• Alcohol

Tips for Liquid Meal Planning

The final days before surgery often include a full liquid diet. This can be challenging if you’re not prepared. Here are some ways to make it easier:

• Plan ahead: Stock up on broths, protein shakes, sugar-free gelatin, and electrolyte drinks.

• Set reminders: Track your fluid intake to stay hydrated and avoid fatigue.

• Use variety: Rotate between warm and cold liquids to reduce boredom.

• Don’t skip meals: Even liquid meals should be spaced out throughout the day.

Work with a Dietitian , You Don’t Have to Do It Alone

This process can feel overwhelming, but you don’t have to navigate it alone. A registered dietitian specialized in bariatric nutrition will guide you every step of the way, from pre-op through recovery. Together, you’ll build a plan that fits your life, preferences, and medical needs and increases your chances of long-term success.