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Considering weight-loss surgery in Turkey? One of the first factors doctors review is your Body Mass Index (BMI). This guide by Tour Medical explains what BMI means, the typical eligibility ranges for gastric sleeve or bypass procedures, and how to prepare for safe, long-term success. If you’d like a personalised eligibility review based on your health history (not BMI alone), you can get a free quote.
What Is BMI and Why It Matters Before Surgery
BMI (Body Mass Index) is a simple formula comparing weight to height to estimate body-fat level. It helps surgeons decide whether bariatric surgery — such as a gastric sleeve package — may be medically appropriate.
BMI = weight (kg) ÷ [height (m)]²
Example: A person weighing 100 kg and 1.70 m tall has a BMI of 34.6.
Understanding BMI Categories
| Category | BMI Range | Interpretation |
|---|---|---|
| Underweight | < 18.5 | Not suitable for bariatric surgery |
| Normal Weight | 18.5 – 24.9 | No bariatric indication |
| Overweight | 25 – 29.9 | Lifestyle support recommended |
| Obesity Class I | 30 – 34.9 | May qualify with related health issues |
| Obesity Class II | 35 – 39.9 | Often eligible for surgery |
| Obesity Class III | 40 + | Usually strong candidate |
The Ideal BMI for Weight-Loss Surgery
Many bariatric procedures — including gastric sleeve and gastric bypass — are commonly recommended for patients with:
- BMI ≥ 40 (with or without other medical issues), or
- BMI ≥ 35 with comorbidities (e.g., Type 2 diabetes, hypertension, sleep apnea, joint pain).
For patients with BMI 30–34.9, surgery may be considered in select cases (for example, significant metabolic disease), but approval depends on medical assessment and safety factors.
BMI is only one part of eligibility. Tour Medical reviews your medical history, tests, and goals to determine the safest option—start with a free consultation.
Comprehensive Evaluation Before Approval
At Tour Medical, eligibility is determined through medical assessment — not BMI alone. Typical pre-operative checks may include:
- Blood tests (glucose, thyroid, liver function)
- ECG and cardiac evaluation
- Sleep apnea screening (when relevant)
- Psychological readiness assessment
This ensures the selected weight-loss package is both safe and effective.
Expected Results Based on BMI
Higher BMI patients often see faster early weight loss, but long-term success depends on nutrition, movement, and follow-up support. Typical outcomes may look like:
- BMI 35–40: 50–60% excess weight loss within ~12 months
- BMI 40–50: 60–70% excess weight loss within ~18 months
- BMI 50+: Gradual loss over ~18–24 months with consistent dietitian support
Results vary by individual, procedure type, and adherence to post-op guidance. To explore which option fits your goals, compare Tour Medical bariatric packages.
How to Prepare Before Surgery
- Follow a low-calorie, high-protein plan (often 1–2 weeks pre-op) to support liver size reduction, if advised.
- Stop smoking and alcohol as recommended to reduce complications.
- Take a multivitamin only if advised by your clinician.
- Bring recent blood tests and relevant medical documents for your consultation in Turkey.
If you want a personalised checklist based on your BMI, age, medications, and medical history, you can get a free quote.
Life After Weight-Loss Surgery
Surgery is only the beginning. Long-term success depends on consistent habits and support.
- Eat smaller balanced meals with sufficient protein.
- Stay hydrated throughout the day.
- Walk daily and gradually increase activity as cleared by your team.
- Attend scheduled follow-ups and share progress with your coordinator.
For recovery routines and travel-safe healing guidance, read our aftercare tips guide.
Frequently Asked Questions
Can I have surgery if my BMI is under 35?
Possibly — if you have obesity-related conditions (for example, metabolic disease or sleep apnea) and your doctor confirms it is safe and appropriate.
What if my BMI is very high (for example, 60+)?
Your surgeon may recommend a pre-operative diet, specialist monitoring, or a staged approach to reduce risk before major surgery.
Does BMI affect which surgery type is recommended?
Often yes. Some higher BMI cases may be better suited to bypass-type procedures, while moderate BMI cases often suit a gastric sleeve—final choice depends on clinical assessment.
Is BMI the only thing that determines eligibility?
No. Doctors also consider medical history, blood tests, heart/lung health, sleep apnea, lifestyle, and readiness for long-term change. Tour Medical confirms eligibility through a full assessment—start with a free consultation.
How do I calculate my BMI at home?
Use the formula: weight (kg) ÷ height (m)². If you share your height and weight during your consultation, our team can confirm the calculation and explain what it means for your options.
What is included in a Tour Medical bariatric package?
Packages commonly include consultations, pre-op tests, hospital/surgeon/anesthesia fees, accommodation, transfers, and aftercare guidance. You can review options on the packages page.
Check Your Eligibility for Weight-Loss Surgery in Turkey
Not sure if your BMI qualifies? Our specialists can evaluate your case and design a custom plan. Get a free consultation and transparent quote from our team today.
