The Science Behind Orlistat - Why It Works
How Orlistat Blocks Fat Absorption
Orlistat works through a simple but effective mechanism. When you eat, your body produces lipase enzymes in the gut to break down dietary fats so they can be absorbed. Orlistat inhibits these lipase enzymes, preventing them from breaking down approximately one third of the fat you consume. This unabsorbed fat cannot enter your bloodstream and passes naturally through your digestive system, reducing the calories your body takes in from meals.
Why Approximately One Third Matters
The precise blocking of approximately one third of dietary fat makes orlistat effective while remaining safe. This partial inhibition means you still absorb essential fatty acids your body needs, whilst creating a meaningful calorie reduction. Combined with a reduced-calorie, lower-fat diet, this mechanism can support significant weight management results. The key is understanding that orlistat enhances your diet efforts rather than replacing them.
Generic Orlistat vs Branded Xenical - Same Mechanism
Both generic orlistat 120mg and branded Xenical 120mg contain identical active ingredients and work through exactly the same fat-blocking mechanism. The clinical effect is equivalent - approximately one third of dietary fat blocked with each dose. Generic orlistat offers exceptional value at £29.69 for 4 weeks (with EDM10), whilst Xenical provides the branded option at £38.69 for 4 weeks (with EDM10). Your prescriber can help determine which option suits your preference and budget.
Maximising Orlistat's Effectiveness
Understanding how orlistat works helps you use it most effectively. Take one 120mg capsule with each main meal containing fat - up to three times daily. The medication works best when meals contain moderate fat levels (around 15g per meal), as this minimises gastrointestinal side effects whilst maintaining the fat-blocking benefit. High-fat meals lead to more pronounced side effects as larger amounts of unabsorbed fat pass through your system.
The Lower-Dose Alternative: Alli 60mg
Alli 60mg works through the same lipase inhibition mechanism but at half the strength of prescription orlistat. This lower dose blocks a smaller proportion of dietary fat, potentially causing fewer side effects whilst still providing weight management support. Alli is available from £26.09 for 4 weeks (with EDM10) and doesn't require a prescription, making it accessible for those preferring a gentler starting approach.
Fast Access Through Online Assessment
Now you understand how orlistat's fat-blocking mechanism works, getting started is straightforward. Complete our online health questionnaire for review by UK-licensed prescribers. If suitable, your prescription is dispensed by our GPhC-registered Leicester pharmacy with next-day delivery across the UK. The prescription is included in the price - no separate GP appointment needed. Use code EDM10 for 10% off every order.
