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How Orlistat Blocks Fat Absorption
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 your body can absorb it. When you take orlistat 120mg with meals, it inhibits these lipase enzymes, preventing approximately one third of the fat you eat from being digested and absorbed. This unabsorbed fat passes naturally through your body, effectively reducing your calorie intake from dietary fat.
Why the Mechanism Matters for Weight Loss
Understanding how orlistat works explains why it's an effective prescription weight loss treatment. Unlike appetite suppressants that affect your brain, orlistat acts locally in your gut where fat digestion occurs. This targeted approach means you can still eat normally while reducing fat absorption by approximately one third. Generic orlistat 120mg (£32.99 for 4 weeks) and branded Xenical 120mg (£42.99 for 4 weeks) contain identical active ingredients, so you get the same fat-blocking mechanism at different price points. Use code EDM10 for 10% off your order.
What Happens When You Take Orlistat
When you take one 120mg capsule with each main meal, orlistat begins working immediately in your digestive system. The medication binds to lipase enzymes, preventing them from breaking down approximately one third of dietary fat. This process is directly related to the fat content of your meals - lower fat meals mean fewer gastrointestinal side effects. The blocked fat is eliminated naturally from your body, typically within 24-48 hours of eating. This mechanism works consistently with each dose, making orlistat effective for ongoing weight management alongside a reduced-calorie, lower-fat diet.
Comparing Orlistat Strengths and Options
Prescription-strength orlistat 120mg offers the most effective fat-blocking mechanism, available as generic orlistat or branded Xenical. Both contain identical active ingredients and work through the same mechanism. Alli 60mg provides a lower-strength option that blocks a smaller proportion of dietary fat. For maximum effectiveness, choose prescription-strength 120mg following an online clinical assessment. Our 12-week supplies offer the best value: generic orlistat costs £95.99 (£86.39 with EDM10) while Xenical costs £128.99 (£116.09 with EDM10).
Scientific Evidence Behind Fat Blocking
Clinical studies demonstrate that orlistat's fat-blocking mechanism leads to measurably reduced fat absorption. The medication specifically inhibits gastric and pancreatic lipases, the key enzymes responsible for dietary fat breakdown. Approximately 30% of dietary fat passes through unabsorbed when taking orlistat as directed. This proven mechanism has been extensively studied and approved by the MHRA for weight management in adults with BMI over 30, or over 28 with weight-related health conditions. The science behind orlistat explains why it remains a first-line prescription treatment for obesity in the UK.
Start Your Orlistat Treatment Today
Now you understand how orlistat works to block approximately one third of dietary fat absorption, you can make an informed treatment decision. Complete our online clinical assessment to determine if orlistat 120mg or Xenical is right for you. Our UK-licensed prescribers will review your information and issue a prescription where clinically appropriate. Your medication will be dispensed by our GPhC-registered pharmacy in Leicester and delivered discreetly to your address with next-day delivery available. Order now and use code EDM10 for 10% off every order.
