How Orlistat Works: Alli vs Xenical Fat Blocker Mechanism

pricing for mounjaro and wegovy weight loss

Understanding how orlistat works helps you choose the right weight loss treatment. Both Alli and Xenical contain orlistat, which blocks approximately one third of dietary fat absorption in your gut. The key difference is strength: Xenical 120mg (£42.99) and generic orlistat 120mg (£32.99) are prescription-only, while Alli 60mg (£28.99) is lower-strength. All work through the same proven mechanism. Save 10% with code EDM10 on every order. Get your orlistat prescription online today through our UK-licensed prescribers and GPhC-registered pharmacy service.

  • Blocks approximately one third of dietary fat absorption through lipase inhibition
  • Same active ingredient in Alli, Xenical and generic orlistat - just different strengths
  • Works locally in the gut, not absorbed into bloodstream significantly
  • Prescription included with online clinical assessment - no GP visit needed
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pricing for mounjaro and wegovy weight loss

*Pricing shown in some areas of this page may not be up to date. Please refer to the “Our Pricing Table” or the price shown after your consultation for the latest live pricing.

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Choose Your Orlistat Strength Based on How It Works

The Science Behind Orlistat's Fat-Blocking Mechanism

Orlistat works by inhibiting lipase enzymes in your digestive system. These enzymes normally break down dietary fat so your body can absorb it. When orlistat blocks these enzymes, approximately one third of the fat you eat cannot be digested or absorbed. This unabsorbed fat passes naturally through your body, reducing the calories you absorb from fatty foods.

This mechanism is identical whether you choose Alli 60mg, generic orlistat 120mg (from £29.69 with EDM10), or branded Xenical 120mg (from £38.69 with EDM10). The difference lies in the strength and therefore the extent of fat blocking.

Alli vs Xenical: Same Mechanism, Different Potency

Understanding how orlistat works explains why prescription-strength options may be more effective. Xenical 120mg and generic orlistat 120mg contain double the active ingredient of Alli 60mg, potentially blocking more dietary fat absorption. Both prescription options work through the same lipase-inhibiting mechanism but at full therapeutic strength.

Generic orlistat 120mg offers identical fat-blocking action to branded Xenical at a lower cost. A 4-week supply costs £32.99 (£29.69 with EDM10) compared to Xenical's £42.99 (£38.69 with EDM10). The mechanism and clinical effect are identical - only the price differs.

Why the Fat-Blocking Mechanism Drives Results

Orlistat's targeted mechanism makes it different from appetite suppressants. It works locally in your gut without significantly entering your bloodstream. When you eat a meal containing fat, orlistat prevents approximately one third of that fat from being absorbed, effectively reducing the calorie content of your meal.

This mechanism means results are directly linked to your fat intake. Lower-fat meals produce fewer side effects, while the medicine continues working to block fat absorption. The unabsorbed fat is eliminated naturally, providing visible evidence that the mechanism is active.

Getting Started with Orlistat Online

Now you understand how orlistat's fat-blocking mechanism works, you can choose your preferred option through our online prescription service. Our UK-licensed prescribers will assess your suitability through a clinical questionnaire, then prescribe the most appropriate strength if suitable.

Whether you choose cost-effective generic orlistat 120mg, branded Xenical 120mg, or lower-strength Alli 60mg, you'll benefit from the same proven fat-blocking mechanism. All options include prescription assessment, are dispensed by our GPhC-registered pharmacy, and qualify for 10% off with code EDM10.

Order Your Orlistat Treatment Today

Understanding the mechanism proves orlistat's targeted approach to weight management. With prescription options from £29.69 per month (with EDM10) and next-day delivery available, you can start benefiting from orlistat's fat-blocking action quickly. Complete your online consultation now to begin treatment.

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