The Science Behind Orlistat's Fat-Blocking Action
How Orlistat Blocks Fat Absorption
Orlistat works by inhibiting lipase enzymes in your digestive system. These enzymes normally break down dietary fat so it can be absorbed into your body. When orlistat blocks these enzymes, approximately one third of the fat you eat cannot be digested or absorbed. This unabsorbed fat passes naturally through your system and is eliminated from your body.
The mechanism is simple but effective: less fat absorbed means fewer calories from dietary fat contributing to weight gain. Generic orlistat 120mg costs just £16.89 for a 2-week supply (£15.20 with code EDM10), while branded Xenical costs £21.50 (£19.35 with EDM10).
Why the Mechanism Proves It Works
Unlike appetite suppressants that work on brain chemistry, orlistat's action is mechanical and measurable. You may notice oily stools or changes in bowel movements — these are actually signs the medication is working by preventing fat absorption. The remaining two thirds of dietary fat is still absorbed normally, so orlistat supports rather than replaces healthy eating habits.
Clinical studies consistently demonstrate that orlistat can support weight management when used alongside a reduced-calorie, lower-fat diet. The 4-week supply (84 capsules) costs £32.99 for generic orlistat (£29.69 with EDM10) or £42.99 for Xenical (£38.69 with EDM10).
Maximising Orlistat's Fat-Blocking Effect
To optimise results, keep meals low in fat (approximately 15g per meal). High-fat meals increase the likelihood of gastrointestinal side effects as more unabsorbed fat passes through your system. Taking one 120mg capsule with each main meal containing fat ensures consistent enzyme inhibition throughout the day.
Our 8-week supply (168 capsules) provides better value at £63.99 for orlistat (£57.59 with EDM10) or £86.99 for Xenical (£78.29 with EDM10). Many patients find the 12-week supply most cost-effective at £95.99 for orlistat (£86.39 with EDM10).
Generic Orlistat vs Branded Xenical
Both contain identical 120mg orlistat and work through exactly the same fat-blocking mechanism. The clinical effect is identical — the main difference is cost. Generic orlistat offers the same fat absorption inhibition as Xenical but saves approximately £10 per month. Some patients prefer branded Xenical while others choose generic orlistat for better value.
Alli 60mg contains half the dose, blocking a smaller proportion of dietary fat. The 4-week supply costs £28.99 (£26.09 with EDM10), making it an option for those preferring lower-strength treatment.
Order Your Supply Today
Now you understand how orlistat blocks approximately one third of dietary fat absorption, take the next step. Complete our online clinical assessment to be reviewed by UK-licensed prescribers. Subject to prescriber approval, your medication will be dispensed by our GPhC-registered pharmacy and delivered discreetly to your address. Use code EDM10 for 10% off every order.
