Understanding Orlistat's Fat-Blocking Mechanism
How Orlistat Blocks Fat Absorption
Orlistat works through a precise 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, it inhibits these lipase enzymes, preventing approximately one third of the fat you eat from being digested and absorbed. This unabsorbed fat then passes naturally through your body and is excreted.
Unlike appetite suppressants that work in the brain, orlistat acts locally in your gut and is not significantly absorbed into your bloodstream. This targeted approach means it specifically addresses dietary fat without affecting your body's processing of carbohydrates or proteins. The mechanism is dose-dependent - orlistat 120mg and Xenical 120mg provide maximum fat-blocking effect, while Alli 60mg offers a lower-strength option.
Why This Mechanism Supports Weight Management
By blocking approximately one third of dietary fat absorption, orlistat can help reduce your calorie intake from fat. Since fat contains 9 calories per gram compared to 4 calories per gram for carbohydrates and protein, reducing fat absorption can contribute significantly to creating the calorie deficit needed for weight loss. This mechanism works best when combined with a reduced-calorie, lower-fat diet and regular physical activity.
The fat-blocking effect is directly related to the fat content of your meals. Lower-fat meals result in fewer side effects, while high-fat meals may cause gastrointestinal effects as the unabsorbed fat passes through your system. This encourages adherence to a healthier, lower-fat eating pattern.
Available Options and Pricing
Understanding how orlistat works helps you choose the right option. Generic orlistat 120mg offers the most cost-effective choice at £32.99 for 4 weeks (£29.69 with EDM10). Xenical 120mg provides the same mechanism and effect as the branded option at £42.99 for 4 weeks (£38.69 with EDM10). For those preferring a lower-strength starting point, Alli 60mg is available at £54.99 for 8 weeks (£49.49 with EDM10).
All options require clinical assessment, with 120mg products being prescription-only medicines. Our UK-licensed prescribers review your suitability based on BMI, health conditions, and weight management goals. Following approval, your treatment is dispensed by our GPhC-registered pharmacy in Leicester with next-day delivery across the UK.
Getting Started with Fat-Blocking Treatment
Now you understand how orlistat blocks approximately one third of dietary fat, you can make an informed decision about starting treatment. Complete our online clinical assessment where a UK prescriber will review your eligibility. The assessment covers your medical history, current BMI, and any medications you're taking to ensure orlistat is suitable and safe for you.
Once prescribed, you'll receive clear guidance on taking orlistat alongside a lower-fat diet to maximise effectiveness and minimise side effects. Remember to take one capsule with each main meal containing fat, up to three times daily. Use discount code EDM10 for 10% off your first and future orders.
