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The Science Behind Orlistat's Fat-Blocking Mechanism
Orlistat works through a targeted mechanism that blocks approximately one third of dietary fat absorption. Unlike appetite suppressants that affect your brain, orlistat acts locally in your digestive system by inhibiting lipase enzymes. These enzymes normally break down fat so it can be absorbed — when blocked, the undigested fat passes naturally through your body instead of adding to your calorie intake.
Why Approximately One Third Matters for Your Weight Loss
This precise mechanism means orlistat blocks roughly 30% of dietary fat calories while allowing the remaining 70% to be digested normally. For someone eating 60g of fat daily, orlistat would block absorption of approximately 20g — that's 180 fewer calories absorbed per day. Over time, this calorie reduction can support significant weight loss when combined with a reduced-calorie, lower-fat diet.
Generic Orlistat vs Xenical: Same Mechanism, Different Prices
Both generic orlistat 120mg and branded Xenical 120mg contain identical active ingredients and work through exactly the same fat-blocking mechanism. At EverydayMeds, you can access this proven mechanism from £15.20 for 2 weeks (generic orlistat with EDM10) or £19.35 for branded Xenical. The clinical effect is identical — the choice comes down to personal preference and budget. Alli 60mg offers the same mechanism at half strength, starting from £26.09 for 4 weeks with EDM10.
How the Mechanism Affects Your Daily Routine
Understanding orlistat's mechanism helps you maximise results while minimising side effects. Because it blocks fat absorption, keeping meals low in fat (around 15g per meal) reduces gastrointestinal effects while still allowing the medicine to work effectively. The unabsorbed fat that causes side effects is actually proof the mechanism is working — it's fat that would otherwise have been stored in your body.
Start Your Fat-Blocking Treatment Today
Now you understand exactly how orlistat's proven mechanism supports weight loss, you can make an informed treatment decision. At EverydayMeds, following online clinical assessment by UK-licensed prescribers, you can access prescription-strength orlistat from £15.20 per fortnight. All three options — generic orlistat 120mg (£29.69 monthly), Xenical 120mg (£38.69 monthly), and Alli 60mg (£26.09 monthly) — work through the same fat-blocking mechanism with 10% off using code EDM10. Dispensed by our GPhC-registered pharmacy with next-day delivery across the UK.
