Why Understanding Orlistat's Mechanism Matters
How Orlistat Blocks Fat Absorption
Orlistat works through a scientifically proven mechanism that targets lipase enzymes in your digestive system. These enzymes normally break down dietary fat so your body can absorb it. When you take orlistat 120mg with meals, it binds to these lipases and blocks approximately one third of the fat you eat from being absorbed. This unabsorbed fat passes naturally through your body, reducing your calorie intake from dietary fat.
Why This Mechanism Proves Effectiveness
Unlike appetite suppressants that work in your brain, orlistat acts locally in your gut where fat digestion happens. This targeted approach means you can see direct evidence the medicine is working - the fat-related side effects actually demonstrate that dietary fat is being blocked. Generic orlistat 120mg (4 weeks £32.99, £29.69 with EDM10) and branded Xenical (4 weeks £42.99, £38.69 with EDM10) work through identical mechanisms.
The Science Behind Lipase Inhibition
Orlistat is a lipase inhibitor that forms covalent bonds with gastric and pancreatic lipases. When you understand this mechanism, you appreciate why timing matters - take orlistat immediately before, during, or within one hour after fat-containing meals. Skip doses when meals contain no fat, because there's nothing for orlistat to block. This precision targeting explains why orlistat blocks approximately one third of dietary fat without affecting carbohydrate or protein absorption.
Comparing Your Orlistat Options
Whether you choose generic orlistat 120mg or branded Xenical, the mechanism remains identical. Both contain orlistat 120mg and block approximately one third of dietary fat absorption. Generic orlistat offers excellent value at £63.99 for 8 weeks (£57.59 with EDM10), while Xenical costs £86.99 for 8 weeks (£78.29 with EDM10). Alli 60mg works through the same mechanism but at half strength, blocking a smaller proportion of fat.
Order Today With Confidence
Now you understand how orlistat works, you can make an informed choice. Complete our online clinical assessment for review by UK-licensed prescribers. We'll dispense your orlistat from our GPhC-registered Leicester pharmacy with next-day delivery. Use code EDM10 for 10% off every order - the mechanism works, the savings are real.
