Why Orlistat's Mechanism Makes It Work
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 body, reducing the calories that contribute to weight gain.
Why This Mechanism Is Clinically Proven
Unlike stimulant-based weight loss treatments that affect your brain, orlistat acts locally in your gut. This targeted approach means it directly reduces calorie absorption from dietary fat without systemic effects. The mechanism is straightforward: less fat absorbed equals fewer calories stored as weight. Generic orlistat 120mg costs £32.99 for 4 weeks (£29.69 with EDM10), while Xenical 120mg costs £42.99 (£38.69 with EDM10) - both containing identical active ingredients with the same fat-blocking effect.
What Happens When You Take Orlistat
When you take one 120mg capsule with each main meal containing fat, orlistat begins working in your digestive system within hours. The medication prevents approximately one third of meal fat from being broken down by lipase enzymes. This undigested fat is eliminated from your body naturally, often causing oily stools - a sign the medication is working as intended. The remaining two thirds of dietary fat is still absorbed normally.
Why Lower Fat Meals Enhance Results
Orlistat works best when combined with meals containing no more than 15g fat each. Higher fat meals not only increase side effects but also mean more total fat calories are still absorbed. By keeping fat intake moderate, you maximise orlistat's effectiveness while minimising gastrointestinal effects. This is why orlistat must be used alongside a reduced-calorie, lower-fat diet.
Comparing Orlistat, Xenical and Alli Mechanisms
All three products work through the same fat-blocking mechanism. Orlistat 120mg and Xenical 120mg are identical in strength and effect - Xenical simply costs more as the branded version. Alli 60mg contains half the dose, blocking a smaller proportion of dietary fat. For maximum effectiveness, most prescribers recommend the 120mg strength. Our 8-week supply of generic orlistat costs £57.59 with EDM10, compared to £78.29 for Xenical - same mechanism, significant savings.
Getting Orlistat Prescribed Online
Understanding how orlistat works confirms why it requires prescription and clinical assessment. Our UK-licensed prescribers evaluate your BMI, health conditions, and suitability for lipase inhibitor treatment. The online consultation takes minutes, with next-day delivery available once prescribed. All orlistat products are dispensed by our GPhC-registered pharmacy in Leicester with full regulatory compliance.
