One of the most important steps in the recovery process after bariatric surgery is paying attention to your diet. Individuals who have undergone gastric sleeve or other bariatric surgeries should adhere to a diet plan that is appropriate for their new stomach structure, as this reduces the risk of complications and increases long-term success. This article will outline the stages of bariatric nutrition step by step and share recommendations for each stage.

Stage 1: Clear Liquid Phase (First 3 Days)

The first week after surgery is extremely critical for the stomach’s healing process. During this period, it is recommended to consume only clear and easily digestible liquids.

Recommended Foods

  • Meat/chicken/bone broth (fat-free and strained)
  • Unsweetened herbal teas
  • Water flavored with mint leaves, cinnamon sticks, or fruit slices (to make it easier to drink)
  • Add seedless compote and apple juice (100% unsweetened)

Important Considerations

  • Aim to consume at least 1.5–2 liters of fluid daily.
  • Avoid carbonated beverages and caffeine.
  • Do not use a straw (to avoid the risk of swallowing air).

Stage 2: Full Liquid Diet (4–14 Days)

In this phase, you begin to consume more nutritious, high-protein liquids. Adequate protein intake is very important during this period for the body to heal and maintain muscle mass.

Recommended Foods

  • Lactose-free milk, plant-based milks (unsweetened)
  • Smoothies with added protein powder
  • Thick soups (strained)
  • Kefir (low-fat and plain)
  • Sugar-free protein drinks

Tips

  • Aim for 60–80 grams of protein per day.
  • Drink slowly, and avoid excessive fluid intake to prevent pressure on the stomach.
  • Avoid products high in sugar and fat.

Stage 3: Puree Phase (Week 3)

This phase is the first step toward transitioning to solid foods. Foods should be soft enough to be mashed with a fork. Foods should be rich in protein and easy to digest.

Recommended Puree Recipes

  • Yogurt-based cooked vegetable puree
  • Chicken and vegetable puree

Important Notes

  • Each bite should be thoroughly chewed or well pureed.
  • When trying a new food, start with a small amount.
  • If symptoms such as stomach pain or vomiting occur, stop immediately.

Stage 4: Soft Foods (Weeks 4–5)

The stomach is now somewhat improved. At this stage, more structured but easily digestible foods such as eggs, well-cooked vegetables, soft meats, and legumes can be part of the diet.

Sample Menu

  • Breakfast: Boiled egg + low-sodium cottage cheese
  • Lunch: Olive oil vegetable dish (zucchini, eggplant) + yogurt
  • Dinner: Grilled chicken (well-cooked) + soft vegetable puree

Common Mistakes

  • Eating too quickly
  • Swallowing without chewing enough
  • Consuming excessively fatty or fibrous foods too early

Stage 5: Transition to Normal Food (Week 6 and Beyond)

During this period, individuals gradually return to normal foods, but some foods may still be risky. Balanced and portion-controlled eating habits should become permanent at this stage.

Free Foods

  • Grilled meat/chicken/fish (well-cooked and fat-free)
  • Dairy products (low-fat, sugar-free)
  • Meatballs and vegetable dishes

Foods to Avoid

  • Fried foods, pastries
  • Carbonated and sugary drinks
  • High-fiber raw vegetables (e.g., cabbage, broccoli)

Nutrition Rules to Follow in Every Stage

  • Each meal should last at least 20 minutes.
  • Solids and liquids should be consumed separately (water should be drunk 30 minutes before/after meals).
  • The daily protein target must be followed.
  • Multivitamins and supplements should be taken regularly.

Common Mistakes Made During Transitions Between Stages

  • Ignoring symptoms and transitioning to the next phase too quickly
  • Returning to solid foods too early
  • Insufficient water and protein intake
  • Failing to take supplements regularly
  • Psychologically remaining attached to old eating habits