The Science Behind Orlistat Fat Blocking Action
How Orlistat Fat Blocking Works in Your Body
Alli weight loss medication contains orlistat, which works by inhibiting lipase enzymes in your digestive system. These enzymes normally break down dietary fat so it can be absorbed into your body. When orlistat blocks these enzymes, approximately one third of the fat you eat cannot be digested or absorbed. This unabsorbed fat passes naturally through your digestive system and is eliminated from your body.
The mechanism is purely mechanical - orlistat acts locally in your gut rather than being absorbed into your bloodstream significantly. This fat-blocking action reduces the calories your body receives from dietary fat, supporting weight management when combined with a reduced-calorie, lower-fat diet and increased physical activity.
Alli 60mg vs Prescription Orlistat 120mg
Understanding the difference between alli and prescription-strength orlistat helps you choose the right option. Alli contains 60mg orlistat per capsule and is available at £28.99 for 4 weeks (£26.09 with EDM10). Prescription orlistat 120mg contains double the dose and costs £16.89 for 2 weeks (£15.20 with EDM10). Both work through the same fat-blocking mechanism, but 120mg prescription strength blocks a higher proportion of dietary fat.
Many people start with alli 60mg to experience how orlistat works before considering prescription strength. Others prefer the more potent 120mg dose from the beginning following clinical assessment by our UK-licensed prescribers.
Why the Fat Blocking Mechanism Supports Weight Loss
Each gram of fat contains 9 calories - more than double the calories in carbohydrates or protein. By blocking approximately one third of dietary fat absorption, orlistat significantly reduces calorie intake from fatty foods. For example, a meal containing 18g fat normally provides 162 calories from fat alone. With orlistat, approximately 6g of that fat (54 calories) would be blocked and eliminated rather than stored.
This mechanism works best when you follow a lower-fat diet. Keeping meals to approximately 15g fat each minimises side effects while maximising the weight management benefits. Our online assessment includes dietary guidance to help you succeed.
Xenical vs Generic Orlistat - Same Mechanism, Different Prices
Prescription orlistat is available as generic orlistat or branded Xenical. Both contain identical 120mg orlistat and work through the same fat-blocking mechanism. Generic orlistat costs £32.99 for 4 weeks (£29.69 with EDM10) while Xenical costs £42.99 for 4 weeks (£38.69 with EDM10). The clinical effect is identical - you save approximately £10 per month choosing generic orlistat.
Some patients prefer branded Xenical while others choose generic orlistat for better value. Your prescriber can help you decide which option suits your needs and budget during the online consultation process.
Fast Track Your Orlistat Order Today
Now you understand how orlistat's fat-blocking mechanism works, you can make an informed decision about alli or prescription-strength orlistat. Complete your online assessment today - our UK-licensed prescribers typically review applications within hours. With next-day delivery available across the UK and 10% off every order with code EDM10, there's never been a better time to start your weight management journey.
EverydayMeds is a GPhC-registered pharmacy based in Leicester, supplying genuine orlistat through regulated UK supply chains. Your medication arrives discreetly packaged with full prescribing information and dietary guidance to maximise your success.
