Why Orlistat's Mechanism Proves It Works
How Orlistat Blocks Fat Absorption
Orlistat works by inhibiting pancreatic and gastric lipases - enzymes responsible for breaking down dietary fats in your digestive system. When these enzymes are blocked, approximately one third of the fat you consume cannot be digested or absorbed. This unabsorbed fat passes through your body naturally, effectively reducing your calorie intake from dietary fat. This mechanism is why orlistat has proven clinical effectiveness when used alongside a reduced-calorie, lower-fat diet.
Orlistat and Kidney Stone Risk
Some patients ask about kidney stones when considering orlistat. The medication may slightly increase the risk of oxalate kidney stones in susceptible individuals. This occurs because orlistat can increase oxalate absorption in the colon. However, this affects only a small percentage of users, and your prescriber will assess your individual risk factors during consultation. If you have a history of kidney stones, discuss this during your clinical assessment.
Generic Orlistat vs Xenical - Same Mechanism, Better Value
Both generic orlistat 120mg and branded Xenical 120mg contain identical active ingredients and work through the same fat-blocking mechanism. Generic orlistat offers the same clinical effect at a lower cost - 4 weeks costs £29.69 with EDM10 compared to £38.69 for Xenical. The choice comes down to personal preference and budget, as both block approximately one third of dietary fat equally effectively.
Why This Mechanism Means Orlistat Works
Unlike appetite suppressants that work in the brain, orlistat's local action in your gut provides measurable fat blocking. You may notice oily stools - this is actually proof the medication is working by preventing fat absorption. When combined with a lower-fat diet (approximately 15g fat per meal), this mechanism can support significant weight management as part of a structured programme.
Getting Started with Orlistat
Ready to experience how orlistat works? Our UK-licensed prescribers assess your suitability through a comprehensive online consultation. We stock orlistat 120mg from £15.20 (2 weeks), Xenical from £19.35 (2 weeks), and Alli 60mg from £26.09 (4 weeks) - all with 10% off using code EDM10. Orders are dispensed by our GPhC-registered pharmacy in Leicester with next day delivery available across the UK.
