Mr Ian Calloway, MBBS, FRCS
Consultant Bariatric Surgeon
Mr Ian Calloway (MBBS, FRCS) is a consultant bariatric and upper gastrointestinal surgeon who specialises in weight-loss surgery, sleeve gastrectomy and gastric bypass. He looks after the clinical content of The Gastric Sleeve Guide.
He makes sure the site has candidacy, the procedure, its risks, recovery, and the long-term outcomes right, measured against the American Society for Metabolic and Bariatric Surgery (ASMBS), the British Obesity and Metabolic Surgery Society (BOMSS), NICE, and the NHS.
His review backs the accuracy of the writing, nothing more personal than that. It isn’t medical advice for you and forms no doctor-patient relationship; weight-loss surgery is a decision for you and your own surgical team, who can assess you and follow you up for the long haul.
Articles medically reviewed by Mr Ian Calloway
- Alcohol After a Gastric Sleeve: Why It Hits Harder and When It Is Safe
- Choosing a Bariatric Surgeon and Hospital: How to Vet a Provider
- Am I a Candidate for a Gastric Sleeve? BMI and Eligibility
- Flying After a Gastric Sleeve: When It Is Safe and What to Plan For
- Exercise After a Gastric Sleeve: When to Start and How to Build Up
- Gallstones After a Gastric Sleeve: Why They Happen and How to Lower the Risk
- Gastric Sleeve and Reflux (GERD): Why It Happens and How It Is Managed
- Dumping Syndrome After a Gastric Sleeve: Causes, Symptoms, and How to Avoid It
- Pregnancy After a Gastric Sleeve: When to Try and What to Watch
- The Gastric Sleeve and Type 2 Diabetes: What Changes, and How Fast
- How Much Does a Gastric Sleeve Cost?
- The Long-Term Gastric Sleeve Diet: How to Eat for Life After Surgery
- Gastric Sleeve Diet Stages: The Week-by-Week Post-Op Plan
- Gastric Sleeve on the NHS: Eligibility, Tier 3, and Waiting Times
- Gastric Sleeve Recovery: What the First Weeks Are Really Like
- Gastric Sleeve Results: How Much Weight Will I Lose?
- Gastric Sleeve Risks and Complications: What to Know
- Gastric Sleeve Stall: Why Weight-Loss Plateaus Happen and What to Do
- Gastric Sleeve Surgery: How It Works, the Risks, and the Results
- Gastric Sleeve Surgery: What Happens on the Day
- Gastric Sleeve vs Diet and Exercise: Why Surgery When Dieting Should Work
- Weight Regain After a Gastric Sleeve: Why It Happens and What to Do
- Gastric Sleeve vs Weight-Loss Injections: How They Compare
- Hair Loss After a Gastric Sleeve: Why It Happens and When It Regrows
- Gastric Sleeve vs Gastric Bypass: How They Differ and Who Each Suits
- Having a Gastric Sleeve Abroad: What to Weigh Up
- How the Gastric Sleeve Works: Restriction and the Hunger Hormone
- Is a Gastric Sleeve Worth It? An Honest Look at the Pros and Cons
- Life After a Gastric Sleeve: Eating, Exercise, and Lifelong Follow-Up
- Loose Skin After Weight-Loss Surgery: Why It Happens and What Helps
- Medications After a Gastric Sleeve: Tablets, Painkillers, and What Changes
- Questions to Ask Your Bariatric Surgeon Before Weight-Loss Surgery
- Preparing for Gastric Sleeve Surgery: The Pre-Op Diet, Tests, and Checklist
- The Emotional Side of Weight-Loss Surgery: Head Hunger, Body Image, and Support
- Types of Weight-Loss Surgery: Sleeve, Bypass, Band, and Balloon Compared
- Vitamins After a Gastric Sleeve: What to Take and Why It Is for Life
- What If the Gastric Sleeve Doesn't Work? Causes, Revision Options, and What to Expect