Post Gastric Bypass Dietary Guidelines:

For the first two weeks after surgery, you will progress from a liquid diet (i.e. soups, unsweetened juices and skim milk) to small amounts of blenderized foods. After two weeks, you will progress to soft, well-cooked, chopped or minced foods. Finally, you will advance to small amounts of solid foods, with emphasis on healthy food choices.

Gastric Bypass Diet - Stage 1 (First Two Weeks)
1. Eat a variety of foods. Use the list below of "Foods to Choose Most Often" to vary your daily menu.
2. Eat six small meals daily to avoid overloading the stomach pouch (e.g. 8am, 10am, noon, 2pm, 5pm, 8pm).
3. Eat slowly. Take at least 20-30 minutes to eat the measured 1/2 cut or less portion. When you feel full stop.
4. Choose food high in protein. Protein is important to help fight infections after surgery, for optimum healing and to maintain muscle mass. Include foods such as skim or 1% milk and yogurt, 1% or fat-free cottage cheese, low-fat cream or blenderized soups, eggs and blenderized meat, poultry and fish.
5. Sips of fluids should be consumed on a constant basis, but not during meals. Drink liquides 30-45 minutes before eating and 1 hour after eating.
6.

Avoid sweets and sugars. They aggravate the dumping syndrome. Symptoms include bloating, nausea, diarrhea, dizziness, weakness, sweating and rapid heartbeat.

7. Supplement your intake with a chewable multivitamin/mineral supplement daily, 1000 mg elemental calcium daily (e.g. three extra-strength Tums taken with meals), ferrous fumarate twice daily, and B12 (500 micrograms orally and monthly injections as needed).
 
Types of Foods Choose Most Often Avoid
Milk and Milk Products As tolerated, skim or 1% milk, buttermilk. Plain or artificially sweetened yogurt. Lactaid Milk 2% and whole milk products. Sweetened yogurt, cream, ice cream, icemilk, sherbet and milkshakes.
Breads and Cereals

Cream of wheat, cream of rice, infant cereals (i.e. Pablum), well-cooked rolled oats. Small amounts of noodles or rice in blenderized soups.

Sugar-sweetened cereals. All breads and all cracker products.
Meat, Fish, Poultry and Alternates Prepare by baking, broiling, poaching or boiling. Pureed fish, chicken, turkey or infant meats. Fat free or 1% cottage cheese. Soft boiled or poached egg. Tofu, added to soups. All fatty fish, meat or poultry, including bacon, salami, pepperoni, luncheon meats, weiners and sausages. High fat cheeses. Eggs cooked with added fat (i.e. fried eggs). All legumes (dried peas, beans or lentils)
Note: Legumes seem to be tolerated if blenderized in soups.
Fruits and Vegetables

Pureed unsweetened canned peaches, pears, apricots and applesauce. Unsweetened fruit juice (may be diluted). Vegetable and tomato juices. Pureed asparagus tips, beets, carrots, parsnips, peas, string beans.

All edible skins, membranes and seeds from fruits and vegetables. All sweetened canned fruit. All sweetened fruit juices and fruit drinks. Gas-forming vegetables: broccoli, cauliflower, brussels sprouts, etc. Potato skins and salads.
Note: Broccoli and cauliflower seem to be tolerated if blenderized in soups.
Soups Blenderized soup, made into a complete meal. Beef broth, consommé and bouillon can be used as a soup base or fat-free gravy. Highly seasoned and creamed soups, unless made with skim milk.
Fats and Oils In small amounts. No more than 1-3 tsp daily. Margarine, vegetable oil. All others.
Desserts and Sweets Baked custard or pudding (artificially sweetened). All others.
Beverages Water, skim milk, herbal or weak tea, decaffinated coffee, club soda, diet soft drinks ("flattened"). All others, including alcohol, regular soft drinks, sugared drink mixes, regular coffee and tea.
Other   Nuts, seeds, pepper, popcorn, spices, high-fat gravies, sugar, honey, jam, jelly, peanut butter.