Stages of Bariatric Diet Schedule

Published: Wednesday, May 13, 2009

Stages and Timing Based on Surgery

One of the absolute most important factors to the success of bariatric surgery is the diet. Timing of the different stages is also critical for the safety of the patient.

For example, natural expected swelling and edema from the surgery, will initially leave the stomach in a slightly vulnerable state until time allows healing. During this period, the types and consistency of foods will be key to allow the healing without causing further trauma or subjecting the stomach to unnecessary mechanical stresses.

Slow progression to thicker consistency foods in the advancing stages is allowed as time from surgery passes. Ultimately, all patients will reach the Stage IV diet where solid foods will be taken.

Gastric bypass and gastric band surgery patients have unique dietary needs after gastric partitioning surgery. Following a well planned diet that begins with liquids and slowly advances to a soft low fat and low carbohydrate diet will help promote healing of surgical wounds, promote weight loss success and improve overall health.


It is important to drink plenty of fluids. This is often difficult because you cannot eat and drink at the same meal together. You must stop drinking fluids 20- 30 minutes prior to eating solid foods. Sip fluids throughout the day. Take calorie free drinks with you during the day. 48-64 ounces of fluid is the daily goal.

Lap Band

Gastric Bypass

Gastric Sleeve

Bariatric Stage Diet

Days 1 – 2 Days 1 – 3 Days 1 – 3 STAGE I
Clear Liquid Diet
Days 3 – 7 Days 4 – 14 Days 4 – 14 STAGE II
Full Liquid Diet.
Begin chewable multi-vitamin/ calcium.
Weeks 2 – 3 Weeks 3 – 6 Weeks 3 – 6 STAGE III
Puree Protein Diet.
Minimum of 60g protein daily.
Week 4 and after
Week 7
Week 7
Low Fat diet.
Low Carb diet.
Minimum of 60g protein daily.
Add 350-500 mcg/day Vitamin B12.