Why Understanding the Mechanism Matters for Your Purchase
The Science Behind Orlistat's Fat Blocking Action
Orlistat works through a scientifically proven mechanism that targets lipase enzymes in your digestive system. These enzymes are responsible for breaking down dietary fat so it can be absorbed into your body. When you take orlistat 120mg with a meal containing fat, it inhibits approximately one third of these lipase enzymes, preventing them from digesting the fat you've eaten. This unabsorbed fat then passes naturally through your digestive system and is eliminated from your body.
This mechanism is identical whether you choose generic orlistat at £29.69 per month or branded Xenical at £38.69 per month (both with EDM10 discount). The active ingredient and clinical effect are exactly the same—the choice comes down to personal preference and budget considerations.
Why Approximately One Third Matters
Understanding that orlistat blocks approximately one third of dietary fat—not all fat—is crucial for realistic expectations. This partial blocking means you still absorb most of the fat you consume, but the reduction can contribute significantly to your weight management goals when combined with a lower-fat, reduced-calorie diet.
For example, if your meal contains 30g of fat, orlistat may prevent approximately 10g from being absorbed, reducing that meal's calorie content by roughly 90 calories. Over time, combined with dietary changes, this mechanism can support meaningful weight reduction.
Local Action, Systemic Benefits
Unlike appetite suppressants that affect your brain, orlistat works locally in your gut. Very little of the medicine enters your bloodstream, which means the fat-blocking action happens exactly where it's needed—in your digestive system. This local mechanism explains both how orlistat works and why the most common side effects are gastrointestinal rather than systemic.
Our 8-week supplies offer excellent value: generic orlistat costs £57.59 with EDM10, whilst Xenical costs £78.29. Both provide the same proven mechanism over the full treatment period.
Choosing Your Orlistat Option
Now that you understand how orlistat blocks approximately one third of dietary fat through lipase inhibition, you can make an informed choice between our available options:
Generic Orlistat 120mg: The most cost-effective choice, with 12-week supplies from £86.39 using code EDM10. Identical mechanism and clinical effect to branded alternatives.
Xenical 120mg: The branded version from Roche, priced at £116.09 for 12 weeks with EDM10. Same fat-blocking mechanism, some patients prefer the branded option.
Alli 60mg: Lower strength option at £116.99 for 12 weeks with EDM10. Blocks a smaller proportion of dietary fat using the same mechanism.
Getting Started with Confidence
Understanding orlistat's mechanism gives you confidence that this isn't a "effective support" but a scientifically proven tool that works through a clear, measurable process. Following online clinical assessment by our UK-licensed prescribers, your chosen treatment will be dispensed by our GPhC-registered pharmacy and delivered discreetly to your address.
The mechanism works best when you keep meals low in fat—this maximises effectiveness whilst minimising gastrointestinal side effects. Your prescriber will provide specific guidance on combining orlistat with an appropriate reduced-calorie, lower-fat diet.
