The Science Behind Orlistat's Fat-Blocking Action
How Orlistat Blocks Fat Absorption
Orlistat works through a scientifically proven mechanism that targets lipase enzymes in your digestive system. These enzymes normally break down dietary fat so it can be absorbed into your bloodstream. When you take orlistat 120mg (whether generic or branded Xenical), it inhibits these enzymes, preventing approximately one third of the fat you eat from being digested. This unabsorbed fat passes through your body naturally—it's not stored or converted to energy.
Why This Mechanism Proves Orlistat Works
The fat-blocking action provides clear evidence that orlistat is actively working. When dietary fat isn't absorbed, you reduce calorie intake from fat sources. Since fat contains 9 calories per gram (more than carbohydrates or protein), blocking one third of fat absorption can significantly reduce your overall calorie intake when combined with a reduced-calorie, lower-fat diet.
Generic orlistat 120mg from £15.20 (4 weeks £29.69 with EDM10) offers this proven mechanism at excellent value, while branded Xenical from £19.35 contains identical orlistat at the same strength.
Orlistat vs Fat Burning—Important Distinction
Orlistat doesn't burn existing fat stores in your body. Instead, it prevents new dietary fat from being absorbed, supporting weight management by reducing calorie intake from fat sources. This mechanism works alongside your reduced-calorie diet and increased physical activity to create the calorie deficit needed for weight loss.
Lower-strength Alli 60mg (from £26.09 with EDM10) uses the same fat-blocking mechanism at half the dose, offering a gentler introduction to orlistat treatment.
Maximising Orlistat's Effectiveness
Understanding how orlistat works helps you use it effectively. Keep each meal to approximately 15g fat or less—this minimises gastrointestinal side effects while allowing the medication to work optimally. Higher fat meals mean more unabsorbed fat, leading to oily stools and discomfort.
Take one capsule with each main meal containing fat, up to three times daily. If you skip a meal or eat a fat-free meal, you can skip that dose.
Choose Your Orlistat Treatment Today
Now you understand exactly how orlistat blocks fat absorption, you can confidently choose your treatment. Our UK-licensed prescribers assess your suitability through a simple online consultation, with next-day delivery available. Generic orlistat offers excellent value, Xenical provides branded reassurance, while Alli gives a lower-strength option—all with 10% off using code EDM10.
