How Orlistat Works: Blocks One Third of Dietary Fat

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Orlistat works by blocking approximately one third of the dietary fat you eat from being absorbed in your gut. As a lipase inhibitor, it prevents digestive enzymes from breaking down fat, allowing unabsorbed fat to pass naturally through your body. This proven mechanism supports weight management alongside a reduced-calorie, lower-fat diet. Available as generic Orlistat 120mg from £15.20 (4-week supply £29.69) or branded Xenical from £19.35, both requiring prescription following online clinical assessment. Alli 60mg offers half-strength dosing. Get 10% off every order with code EDM10. Now you understand how orlistat works - order today through our GPhC-registered pharmacy.

  • Blocks approximately one third of dietary fat absorption through proven lipase inhibition
  • Acts locally in gut - not absorbed into bloodstream like stimulant diet pills
  • Available as cost-effective generic Orlistat 120mg or branded Xenical 120mg
  • Prescription included with online consultation - no separate GP appointment 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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Ready to Start? How Orlistat's Mechanism Benefits You

The Science: How Orlistat Blocks Fat Absorption

Orlistat works through a precisely targeted mechanism that acts directly in your digestive system. Unlike appetite suppressants that affect the brain, orlistat inhibits lipase enzymes responsible for breaking down dietary fat in your gut. When these enzymes are blocked, approximately one third of the fat you eat cannot be digested or absorbed into your body. This unabsorbed fat passes naturally through your digestive system and is excreted.

This mechanism is why orlistat requires a prescription-only approach for the 120mg strength - it's a clinically proven medicine that needs proper medical oversight. Generic Orlistat 120mg starts from £16.89 (£15.20 with EDM10) for 2-week supply, while branded Xenical 120mg costs £21.50 (£19.35 with EDM10).

Why This Mechanism Makes Orlistat Effective

Understanding how orlistat works explains why it can support weight management when used alongside a reduced-calorie, lower-fat diet. By preventing approximately one third of dietary fat absorption, orlistat reduces the calorie intake from fat in your meals. Fat provides 9 calories per gram - the most calorie-dense macronutrient - so blocking its absorption can create a meaningful calorie deficit.

The mechanism also explains why keeping meals low in fat (approximately 15g per meal) minimises gastrointestinal side effects. High-fat meals mean more unabsorbed fat passing through your system, leading to the oily stools and urgency that some patients experience initially.

Orlistat vs Xenical: Same Mechanism, Different Prices

Both generic Orlistat 120mg and branded Xenical 120mg contain identical active ingredients and work through the same fat-blocking mechanism. The clinical effect is equivalent - both block approximately one third of dietary fat absorption through lipase inhibition. The difference lies in cost and manufacturer.

Generic orlistat offers significant savings: 4-week supply costs £32.99 (£29.69 with EDM10) compared to Xenical at £42.99 (£38.69 with EDM10). That's nearly £120 annual savings while getting the same proven mechanism. Our 12-week generic orlistat supply costs £95.99 (£86.39 with EDM10) versus Xenical at £128.99 (£116.09 with EDM10).

Alli 60mg: Lower-Dose Option

Alli contains orlistat at half the prescription strength (60mg vs 120mg) and works through the same mechanism, blocking a smaller proportion of dietary fat. While less potent than prescription-strength orlistat, Alli can be suitable for those preferring a gentler starting approach. Available from £28.99 for 4-week supply (£26.09 with EDM10).

How Our Online Prescription Process Works

Getting orlistat through EverydayMeds is straightforward. Complete our online health questionnaire covering your medical history, current medications, and BMI details. A UK-licensed prescriber reviews your information and, if clinically appropriate, issues a prescription. We then dispense and dispatch from our GPhC-registered Leicester pharmacy with next-day delivery available.

This regulated process ensures you receive genuine orlistat while accessing the convenience of online prescribing. The prescription cost is included in our prices - no separate GP fees or waiting for NHS appointments.

Start Your Weight Management Journey Today

Now you understand orlistat's proven mechanism - blocking approximately one third of dietary fat through lipase inhibition - you can make an informed decision about treatment. Whether choosing cost-effective generic orlistat, branded Xenical, or lower-strength Alli, all work through the same scientifically proven approach.

Order today with confidence through our GPhC-registered pharmacy. Use code EDM10 for 10% off every order, and benefit from discreet next-day delivery across the UK. Your weight management journey starts with understanding how orlistat works - now take the next step and order online.

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