Rapid Fat Burning: According to some users' reports, Clenbuterol may be an effective thermogenic compound. Thermogenesis refers to the production of heat within the body; this occurs naturally when food is metabolized for energy but can also be stimulated artificially through certain drugs like Clenbuterol. In theory then clen would increase metabolic rate leading too more calories burnt off each day thus causing weight loss even without dieting or exercising very much.Increase in Basal Metabolic Rate (BMR): It has been suggested that Clenbuterol use leads too a significant rise in BMR levels – this basically means that even at rest you will burn off slightly more calories than usual. This would be particularly useful for those who have trouble with their weight even when they are not consuming excessive amounts of food.Slight Anabolic Effect: Although Clenbuterol is generally thought to be a mainly catabolic compound, some studies have shown it can have slight anabolic properties too – meaning that in addition too aiding fat loss, lean muscle may also increase slightly during use.