Why Orlistat's Fat-Blocking Action Makes It Effective
How Alli Weight Loss Drug Works in Your Body
Alli contains orlistat 60mg, a clinically-proven fat blocker that works by inhibiting lipase enzymes in your digestive system. These enzymes are responsible for breaking down dietary fat so it can be absorbed. When orlistat blocks these enzymes, 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 your overall calorie intake from dietary fat.
Unlike appetite suppressants that work on your brain, orlistat works locally in your gut and is not significantly absorbed into your bloodstream. This targeted mechanism means it specifically addresses dietary fat absorption whilst allowing normal digestion of carbohydrates and proteins.
Alli 60mg vs Prescription Strength Orlistat
Alli 60mg provides half the dose of prescription-strength orlistat 120mg, making it a suitable lower-strength option for many people. Our prescription orlistat 120mg from £29.69 (4-week supply with EDM10) offers maximum strength fat blocking, whilst Xenical 120mg from £38.69 provides the same clinical effect in the original branded formulation.
All three products work through the same fat-blocking mechanism - the key differences are dose strength and price. Your prescriber will recommend the most suitable option following your online clinical assessment.
What to Expect When Orlistat Starts Working
The fat-blocking action of orlistat begins with your first dose. You may notice changes in your bowel movements as unabsorbed fat is naturally eliminated from your body. These effects are actually a sign that the medicine is working as intended, blocking approximately one third of dietary fat from being absorbed.
To minimise gastrointestinal effects and maximise results, keep your fat intake to approximately 15g per meal. This lower-fat approach works synergistically with orlistat's fat-blocking mechanism, supporting sustainable weight management whilst reducing side effects.
Why the Fat-Blocking Mechanism Supports Weight Loss
Fat contains 9 calories per gram - more than twice the calories of carbohydrates or protein. By blocking approximately one third of dietary fat absorption, orlistat can significantly reduce your calorie intake from fat. When combined with a reduced-calorie, lower-fat diet and increased physical activity, this mechanism can support meaningful weight loss over time.
Clinical studies demonstrate that orlistat's fat-blocking action helps people lose more weight than diet and exercise alone. The key is consistency - taking orlistat with each main meal containing fat ensures optimal fat-blocking throughout the day.
Starting Your Orlistat Treatment Today
Now you understand how orlistat's fat-blocking mechanism works, you can make an informed decision about treatment. Our 4-week alli starter pack costs just £26.09 with code EDM10, delivered next day from our GPhC-registered pharmacy in Leicester.
Complete our online clinical assessment today - it takes just minutes and will be reviewed by a UK-licensed prescriber. If suitable, your alli will be prescribed, dispensed and dispatched the same day. Ready to experience orlistat's proven fat-blocking action?


