The Science Behind Orlistat - Why It Works
How Orlistat 120mg Blocks Fat Absorption
Orlistat works through a targeted mechanism that inhibits lipase enzymes in your digestive system. These enzymes are responsible for breaking down dietary fat into smaller molecules that your body can absorb. By blocking approximately one third of these enzymes, orlistat prevents roughly one third of the fat you eat from being absorbed into your body. This unabsorbed fat passes naturally through your digestive system and is eliminated.
This mechanism makes orlistat fundamentally different from appetite suppressants that work in the brain. Instead, it acts locally in your gut, with minimal absorption into your bloodstream. Generic orlistat 120mg costs from £29.69 for a 4-week supply (84 capsules) with code EDM10, whilst branded Xenical costs £38.69 for the same quantity.
Why Fat Blocking Supports Weight Management
By preventing approximately one third of dietary fat absorption, orlistat reduces the calorie content of your meals. Fat contains 9 calories per gram - more than twice the calories of carbohydrates or protein. When orlistat blocks this fat absorption, those calories cannot contribute to weight gain. However, orlistat works best alongside a reduced-calorie, lower-fat diet and regular physical activity.
The mechanism explains why keeping meal fat content low (around 15g per meal) minimises side effects. High-fat meals result in more unabsorbed fat passing through your system, increasing the likelihood of gastrointestinal effects. Our 8-week supply (168 capsules) costs £57.59 with EDM10 for orlistat or £78.29 for Xenical.
Clinical Evidence Behind the Mechanism
Orlistat's lipase inhibition has been extensively studied in clinical trials. The drug specifically targets pancreatic and gastric lipases, which are essential for fat digestion. This selective action means orlistat doesn't interfere with the absorption of carbohydrates, proteins, or most vitamins and minerals. However, it may reduce absorption of fat-soluble vitamins (A, D, E, K), which is why a bedtime multivitamin is recommended.
Individual responses vary, but the mechanism remains consistent - approximately one third of dietary fat is blocked in all patients taking orlistat correctly. This predictable action makes it a reliable option for supporting weight management when prescribed following clinical assessment by UK-licensed healthcare professionals.
Starting Orlistat Treatment - Understanding the Process
Our online consultation allows UK-licensed prescribers to assess your suitability for orlistat 120mg. Treatment typically begins with a 2-week supply (42 capsules) costing £15.20 with EDM10, allowing you to experience how the fat-blocking mechanism works with your diet and lifestyle. You take one capsule three times daily with each main meal containing fat.
For longer-term treatment, our 12-week supply (252 capsules) offers better value at £86.39 for generic orlistat or £116.09 for Xenical with code EDM10. All orders include the online prescription service, dispensing by our GPhC-registered pharmacy, and discreet next-day delivery across the UK.
