Understanding Orlistat's Mechanism Can Guide Your Choice
How Orlistat Blocks Fat Absorption
Orlistat works through a simple but effective mechanism. When you take a 120mg capsule with a meal containing fat, orlistat inhibits lipase enzymes in your digestive system. These enzymes normally break down dietary fat so your body can absorb it. With orlistat blocking approximately one third of these enzymes, roughly one third of the fat you eat cannot be digested or absorbed. Instead, this unabsorbed fat passes naturally through your body and is eliminated.
This mechanism explains why orlistat works best with a lower-fat diet. The less fat you consume per meal, the fewer gastrointestinal side effects you may experience, while still benefiting from the fat-blocking action.
Clinical Evidence Behind The Mechanism
Orlistat's fat-blocking mechanism has been extensively studied. By preventing approximately one third of dietary fat absorption, orlistat can help reduce overall calorie intake when used alongside dietary changes. This is why many UK adults have successfully used orlistat as part of their weight management programme.
At EverydayMeds, we stock both generic orlistat 120mg and branded Xenical 120mg - both containing identical active ingredients with the same mechanism of action. Generic orlistat 84 capsules cost £32.99 (£29.69 with EDM10), while Xenical 84 capsules cost £42.99 (£38.69 with EDM10). The mechanism works identically - the choice often comes down to personal preference and budget.
What This Means For Your Weight Management
Understanding orlistat's mechanism helps explain why it must be used alongside dietary changes. Since orlistat only blocks approximately one third of dietary fat - not carbohydrates, proteins, or alcohol calories - a reduced-calorie diet remains essential. The medication supports your efforts by reducing fat absorption, but cannot replace healthy eating and regular physical activity.
Many patients find that knowing how orlistat works helps them make better food choices. When you understand that high-fat meals increase the likelihood of gastrointestinal side effects, you're more likely to stick to the recommended lower-fat diet that makes orlistat most effective and tolerable.
Comparing Your Options
All our orlistat products work through the same fat-blocking mechanism. Orlistat 120mg and Xenical 120mg both block approximately one third of dietary fat. Alli 60mg works through the same mechanism but at half the dose, making it a gentler option for some patients. Our 12-week supply of generic orlistat (252 capsules) costs £95.99, or £86.39 with EDM10 - representing excellent value for a clinically-proven mechanism.
Getting Started With Orlistat
Now that you understand how orlistat's fat-blocking mechanism works, you can make an informed decision about whether it suits your weight management goals. Our online clinical assessment takes just minutes to complete, and a UK-licensed prescriber will review your suitability. If approved, your orlistat will be dispensed by our GPhC-registered pharmacy and delivered discreetly to your address with next day delivery available.
