Phase IV – Bariatric Diet

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High Protein Foods and Vegetables

Vitamin and Mineral Supplements


Start approximately 2-3 months after surgery once the Phase III bariatric diet is well tolerated.

You will continue the Phase IV bariatric diet until you have reached your goal of 75% excess body weight loss or via conversation with the registered dietitians or your medical doctor based on your nutritional status and food tolerance.



Types of foods/liquids permitted:  Soft proteins (Proteins should be moist and lean)



Seafood (canned or fresh) – soft flaky fish
White fishOrange roughlyFlounderSole
HalibutCodHaddockSea bass
Shellfish (canned or fresh)
Low fat Dairy Products
Low fat, sugar free or carb-controlled, Greek yogurt without visible fruit pieces
Low fat cottage cheeseLow fat farmer cheese
Low fat ricotta cheeseLow fat soft cheeses
Eggbeaters®Egg whites          Whole egg
Avoid fried or undercooked eggs
Poultry (canned or fresh, skin removed)
TurkeyChickenGame henDuck breast
Deli meats such as roast turkey breast or chicken breast
Meat (canned or fresh)
Low sodium, rind-less, no sugar added cold cuts and deli meats
Ham, red meat and pork may be difficult to digest;  always check your tolerance level
Black beansKidney beansGarbanzo beansWhite beans
Lentils        Hummus and pureed beans may be well tolerated
Soy and Tofu
Tofu burgers


Boca-burgers®Morningstar ® brand soy products

Soy beans (edamame unshelled)

*** All burgers must be without the bun or lettuce, tomato etc.
Nuts and Nut butters (May consume ~1 month out from surgery)

Soft nuts such as walnuts and pistachios                    Natural whipped, low sugar peanut butter


Proteins should be moist and lean

You may add low sodium broth or low fat, low sugar dressings to prepare proteins and add moisture


Vegetables are permitted

Start with soft, cooked vegetables first
Avoid vegetables that do not become soft when cooked
Avoid fibrous stalks like those found in asparagus, broccoli, celery, stalks of romaine lettuce, kale, etc.
Avoid seeds and peels
You may introduce raw vegetables only after you can tolerate a variety of cooked vegetables
When eating raw vegetables try softer vegetables like broccoli florets, bibb lettuce, red-leaf lettuce or boston lettuce.  Remember to chew vegetables thoroughly (“30 second rule”- chew 30 times) and swallow only when it has been made into a mushy consistency
If you have trouble with gas avoid eating gas-producing vegetables like onions, cauliflower, garlic, scallions, leeks, brussel sprouts, cabbage



Types of foods/liquids NOT permitted:     No starchy carbohydrates, starchy vegetables or high fiber fruits



§  No juices with >5g of sugar§  Avoid dried out, over-cooked meats
§  No red meat for 6 months§  No carbonated beverages
§  Do not fry or put “breading” on the protein


§  No caffeinated beverages
§  Monitor tolerance to spicy foods§  No alcoholic beverages for 6 months
§  Avoid soups that are cream based. If high protein soups are consumed drain off the broth to ensure adequate protein intake.


Important Nutritional Considerations

  • The goal is to consume at least 60-80 grams of protein per day with the addition of vegetables
  • Consume 3 – 4 ounces of protein 3 times per day (breakfast, lunch and dinner – do not skip these meals)
  • Always eat your PROTEIN foods first before eating the vegetables
    • Vegetables contain ~2g of protein per ½ cup serving
  • Continue to consume sugar-free, non-carbonated, decaffeinated clear liquids in between the high protein meals for a total of 64 ounces (8 cups) of liquids per day
  • Use moist cooking methods such as boiled, baked, sautéed, poached, stewed or braised
  • Choose low fat proteins and choose other healthy fats such as avocado, oils, olive oil


***  Continue vitamin and mineral supplementation with adjustments per the registered dietitians, or your medical doctor.



Important Reminders

  • “30-Minute Rule”: Do not drink any liquids 30 minutes before or after consuming “solid” proteins
  • “30-Second Rule”: chew each bite 30 times or for 30 seconds before swallowing
  • Take small bites and chew well
  • Introduce one “new” food item at a time
  • Always check your tolerance level and stop drinking or eating when full
  • Monitor tolerance to extreme temperatures (extreme cold or hot)
  • Remember to sip slowly, do not gulp, do not use a straw
  • Do not skip meals. Have 3 meals per day (breakfast, lunch and dinner)
  • Give yourself 30-45 minutes for each of your main meals
    • Avoid returning to your meal after a few hours
  • Always remember to keep increasing physical activity as tolerated
  • Eat from smaller plates (salad plates) and use smaller utensils to assist with portion control
    • You will only be able to eat a few tablespoons at a time


Sample of a Phase IV Bariatric Diet Menu


MorningDecaffeinated coffee with Splenda® (without cream/sugar)
Breakfast4 ounces of Eggbeater® omelet with sautéed mushrooms, scallions and cheese
Mid-morning8 oz Crystal Light®
Lunch1 Boca burger without the bun, steamed broccoli
Mid-afternoon8 oz Crystal Light®
Dinner3-4 ounces baked tilapia fish, green beans
Evening8 oz Crystal Light®
Remember: do not consume any liquids 30 minutes before or after consuming “solid” foods

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