Orlistat vs Xenical vs Alli: How Fat Blocking Works

pricing for mounjaro and wegovy weight loss

Understanding how orlistat works is key to making an informed purchase decision. Orlistat blocks approximately one third of dietary fat absorption by inhibiting lipase enzymes in your gut. Available as generic orlistat 120mg (from £15.20 with EDM10), branded Xenical 120mg, or lower-strength Alli 60mg, all work through the same proven mechanism. This fat-blocking action happens locally in your digestive system, preventing absorbed calories from contributing to weight gain. Our GPhC-registered pharmacy supplies all three options with next-day delivery following online clinical assessment.

  • Blocks approximately one third of dietary fat from being absorbed
  • Same proven mechanism across orlistat, Xenical and Alli formulations
  • Works locally in gut - not absorbed into bloodstream significantly
  • 10% off every order with code EDM10 - from £15.20 for orlistat
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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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Why Understanding the Mechanism Matters for Your Choice

How Orlistat's Fat-Blocking Mechanism Works

Orlistat works through a scientifically proven mechanism that directly targets dietary fat absorption. When you eat, enzymes called lipases break down fat so your body can absorb it. Orlistat inhibits these lipase enzymes in your gut, preventing approximately one third of the fat you eat from being digested and absorbed. This unabsorbed fat passes naturally through your digestive system, reducing the calories your body takes in from dietary fat.

Why All Three Products Work the Same Way

Whether you choose generic orlistat 120mg (£32.99 for 4 weeks, £29.69 with EDM10), branded Xenical 120mg (£42.99 for 4 weeks, £38.69 with EDM10), or Alli 60mg (£28.99 for 4 weeks, £26.09 with EDM10), the mechanism remains identical. The 120mg prescription versions block the same proportion of dietary fat, while Alli's lower 60mg dose provides a gentler introduction to fat-blocking treatment. All work locally in your digestive system without significant absorption into your bloodstream.

Evidence the Mechanism Actually Works

The fat-blocking mechanism isn't just theory - patients often notice unabsorbed fat being eliminated naturally, particularly when eating higher-fat meals. This visible proof demonstrates the medicine is actively working. The mechanism is most effective when combined with a reduced-calorie, lower-fat diet, as keeping fat intake to approximately 15g per meal minimises side effects while maximising the treatment benefit.

Choosing Based on Mechanism Understanding

Now you understand how orlistat blocks fat absorption, you can make an informed choice between the three options. Generic orlistat 120mg offers the most cost-effective access to the full prescription-strength mechanism. Xenical 120mg provides the same clinical effect with branded assurance. Alli 60mg delivers the proven mechanism at half strength for those preferring a gentler start.

Ready to Order Your Fat-Blocking Treatment

Understanding the mechanism proves orlistat's effectiveness - it's not just an appetite suppressant but actively prevents dietary fat absorption. Our 8-week supply of orlistat costs just £57.59 with code EDM10, while 12-week supplies provide the best value at £86.39. Complete your online clinical assessment today and have your chosen treatment delivered discreetly tomorrow by our GPhC-registered pharmacy in Leicester.

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