Why Understanding Orlistat's Mechanism Matters Before You Buy
How Orlistat Blocks Fat Absorption
Orlistat works by inhibiting pancreatic and gastric lipase enzymes in your digestive system. These enzymes are responsible for breaking down dietary triglycerides into absorbable fatty acids. When orlistat blocks approximately one third of these enzymes, the corresponding amount of dietary fat cannot be digested and passes through your body naturally. This mechanism makes orlistat particularly interesting for those following a keto diet, where fat intake is typically higher than standard diets.
Orlistat and Keto Diet Compatibility
The ketogenic diet relies on high fat intake to maintain ketosis, but orlistat's fat-blocking action doesn't interfere with this metabolic state. While orlistat reduces absorption of approximately one third of dietary fat, the remaining two thirds still provides sufficient fat for ketone production. This means you can maintain ketosis while reducing overall calorie intake from fat. Generic orlistat 120mg costs £32.99 for 84 capsules (4-week supply), or save with code EDM10 for £29.69.
Why the Mechanism Proves Effectiveness
Unlike appetite suppressants that work in the brain, orlistat's gut-based mechanism provides visible proof it's working. The gastrointestinal effects you may experience are actually evidence that dietary fat is being blocked from absorption. This local action in the digestive system, rather than systemic absorption, explains why orlistat has a different side effect profile compared to other weight loss medications. Understanding this mechanism helps explain why keeping fat intake moderate (around 15g per meal) minimises side effects while maximising benefits.
Choosing Between Orlistat, Xenical and Alli
All three products use the same fat-blocking mechanism, but at different strengths. Orlistat 120mg and Xenical 120mg contain identical active ingredients - the difference is price. Generic orlistat offers the same fat-blocking power for £32.99 per month versus Xenical at £42.99. Alli 60mg provides half the dose, blocking a smaller proportion of dietary fat but typically with milder side effects. For keto dieters who want maximum fat-blocking potential, prescription-strength 120mg options are most suitable.
Clinical Evidence Behind the Mechanism
Orlistat's lipase inhibition mechanism has been extensively studied in clinical trials. The medication blocks approximately one third of dietary fat consistently across different meal compositions, making it predictable for diet planning. This mechanism means orlistat works best when taken with fat-containing meals - if you skip a meal or eat a fat-free meal, you can skip that dose. For keto dieters eating regular fat-containing meals, the standard dosing of one capsule three times daily provides consistent fat-blocking action.
Get Your Prescription Today
Now you understand exactly how orlistat blocks fat absorption, you can make an informed purchasing decision. Complete our online clinical assessment to determine if orlistat 120mg, Xenical 120mg, or Alli 60mg is right for your keto diet goals. Our UK-licensed prescribers review applications within hours, and our GPhC-registered Leicester pharmacy dispatches with next-day delivery. Use code EDM10 for 10% off your first order.
