The Science Behind Orlistat's Fat-Blocking Action
How Orlistat Blocks Fat Absorption
Orlistat works by inhibiting lipase enzymes in your digestive system that normally break down dietary fat. When these enzymes are blocked, approximately one third of the fat you eat cannot be digested or absorbed into your body. This unabsorbed fat passes naturally through your digestive system, reducing the calories your body stores from fatty foods. Unlike appetite suppressants that affect your brain, orlistat works locally in your gut and is not significantly absorbed into your bloodstream.
Why the Mechanism Matters for Weight Loss
Understanding this mechanism shows why orlistat can support effective weight management. Fat contains 9 calories per gram - more than double the calories in carbohydrates or protein. By blocking approximately one third of dietary fat absorption, orlistat helps reduce your calorie intake from high-fat foods. This creates a calorie deficit that, combined with a reduced-calorie, lower-fat diet and increased physical activity, may contribute to weight loss over time.
Prescription Strength vs Lower-Strength Options
EverydayMeds offers three orlistat options, all working through the same fat-blocking mechanism. Prescription-strength orlistat 120mg (£32.99 for 4 weeks, £29.69 with EDM10) provides the full clinical dose. Branded Xenical 120mg (£42.99 for 4 weeks, £38.69 with EDM10) contains identical orlistat 120mg but costs more. Alli 60mg (£28.99 for 4 weeks, £26.09 with EDM10) offers half the dose for those preferring a lower-strength option. All require the same approach: take one capsule with each main meal containing fat, up to three times daily.
What to Expect When Orlistat Works
The fat-blocking mechanism means you may notice gastrointestinal effects, particularly if you eat high-fat meals. These effects - including oily stools, increased bowel movements, or oily spotting - are actually signs the medication is working by preventing fat absorption. Keeping meals to approximately 15g fat each significantly reduces these effects while maintaining orlistat's weight management benefits. Most people find effects become more manageable as they adapt to a lower-fat diet.
Getting Started with Orlistat
Now you understand how orlistat blocks approximately one third of dietary fat absorption, you can make an informed choice about treatment. Our online clinical assessment takes minutes to complete and is reviewed by UK-licensed prescribers. If suitable, your prescription orlistat is dispensed by our GPhC-registered Leicester pharmacy and delivered with next-day tracking. Use code EDM10 for 10% off every order. Start your assessment today - your weight management journey begins with understanding how orlistat's proven mechanism can support your goals.
