Bariatric surgery nutrition
From preparation before the operation to lifelong follow-up: what to eat, how much and how at each stage. Consistent with your surgical team's protocol.
- Stages
- 6 stages
- Protocol
- Consistent with your surgical team
- Follow-up
- Annual blood test monitoring
Stage timeline
Pre-operative preparation
- Duration
- 2–4 weeks before surgery
- Texture
- Normal; low-energy, protein-focused
Following the surgical team's advice, a low-energy, protein-focused period may be used. It is also the time to practise eating slowly, taking small bites and not drinking with meals.
On the plate at this stage
- Boiled eggs, curd cheese, strained yoghurt
- Grilled fish and chicken, legume dishes
- Plenty of vegetables, water (between meals)
Avoided at this stage
- Sugary and fizzy drinks
- Fried food, pastries
- Alcohol
If you smoke, your team will ask you to stop; this period is a good start for that too.
Clear liquids
- Duration
- First 1–2 days
- Texture
- Clear, sugar-free liquids
Started in hospital in the first days after surgery. Liquids are taken sip by sip in very small amounts.
On the plate at this stage
- Water, sugar-free clear herbal teas
- Fat-free strained meat or vegetable broth
- Sugar-free, still clear drinks
Avoided at this stage
- Fizzy drinks, straws
- Sugary drinks, fruit juice
Your team sets the daily fluid goal; dehydration is the most common problem in this stage.
Full liquids and protein
- Duration
- About weeks 1–2
- Texture
- Runny, smooth
The stage where meeting protein needs begins. Your team may suggest a protein drink if needed.
On the plate at this stage
- Low-fat milk, ayran, kefir
- Thinned strained yoghurt
- Strained lentil or vegetable soup
Avoided at this stage
- Food with solid pieces
- Sugary milk puddings
Protein first and fluids between meals becomes a habit from this stage on.
Purée
- Duration
- About weeks 3–4
- Texture
- Smooth purée, by spoon
Food is blended to a smooth texture. Portions are a few tablespoons; every bite is eaten slowly.
On the plate at this stage
- Blended lentil soup, mashed egg
- Curd cheese, strained yoghurt
- Boiled vegetable and fish purée
Avoided at this stage
- Dry, stringy meat, raw vegetables
- Rice, pasta, bread
Spreading a meal over 20–30 minutes clearly reduces discomfort.
Soft
- Duration
- About weeks 5–8
- Texture
- Mashable with a fork
Well-cooked foods that can be mashed with a fork. New foods are tried one at a time.
On the plate at this stage
- Soft-cooked fish, lean meatballs
- Scrambled egg, white cheese
- Well-cooked vegetable dishes
Avoided at this stage
- Crusty and hard foods
- Pastries, fried food
If a food causes discomfort it can be retried a few days later; do not drop it at once.
Normal and long term
- Duration
- From about week 8
- Texture
- Balanced, small plate
Balanced eating on a small plate: protein first, then vegetables, grains last. Lifelong vitamin and mineral supplements and yearly lab follow-up continue.
On the plate at this stage
- Protein + vegetables + a little grain on a small plate
- 3 main meals and 1–2 snacks a day
- Fluids 30 min before and after meals
Avoided at this stage
- Drinking with meals
- Sugary and fatty snacks
Yearly tests follow B12, ferritin, vitamin D and other values your doctor requests.
Durations are general information; they vary with the type of operation and your surgical team's protocol. Your team's written advice always takes priority.
Five rules that apply at every stage
- Protein first
- Protein goes on the plate first and is eaten first; your team sets the daily target.
- Fluids separately
- Not with meals; sip by sip, from about 30 minutes before and after a meal.
- Slowly
- Small bites, chewed well; a meal takes 20–30 minutes.
- Supplements every day
- Vitamin and mineral supplements as your team recommends, without missing a day.
- Blood tests every year
- B12, ferritin, vitamin D and any other values your doctor requests, at least once a year.
Tests monitored in the long term
After the operation, absorption of some vitamins and minerals may decrease. These values are monitored at the interval your doctor requests; we reflect the results in your nutrition plan.
Bariatric surgery nutrition follow-up
Before surgery + first 6 months · Visits during preparation and at every transition stage.
- 2 visits before surgery
- Every 2 weeks for 3 months, then monthly for 3 months
- Written meal plans for each stage
- Lab review at month 6
19.500 TLVAT included · 3 instalments
Appointment requestQuestions about bariatric surgery
All questions- How long before surgery should I start?
- It depends on your surgical team; usually 2–4 weeks before surgery. If your date is not set, we plan it together in the pre-call.
- How long will I take supplements?
- After bariatric surgery vitamin and mineral supplements usually continue for life. Type and dose are set by your surgical team and doctor; we help follow them with yearly tests.