This is a question we get asked often, and there is a simple answer. Clen is a Clenbuterol Hydrochloride is a sympathomimetic that works on the sympathomimetic nervous system. There are several receptors in the body a sympathomimetic can act on. In the case of Clenbuterol, the beta-2 receptor is the area of interest and action. Clen, as it’s commonly known, actively stimulates the beta-2 receptor. Through such stimulation, this actively reverses airway obstructions and provides improved breathing for those who need it.

This same stimulation can also be used to enhance the metabolic rate of the individual. Clenbuterol does not actively burn fat by attacking fat cells, but rather stimulates the metabolism by increasing the body’s temperature. This occurs due to the beta-2 stimulation stimulating the mitochondria of the cells to produce and release more heat. In turn, this heats up the body’s temperature (slightly), enhances the metabolism and causes the individual to burn body fat at a greater rate. In reality, the functions and traits of Clenbuterol are very simple and very straightforward.

When using Clenbuterol, many often inaccurately assume that when the stimulating effects of Clen began to fade that the thermogenic effects are no longer working. Most will find that the stimulating effects will greatly subside after a week or so of use, but assuming the fat burning properties have vanished due to this lessened stimulation is highly inaccurate. The same dose of Clenbuterol Hydrochloride can actually keep the metabolism revved for as much as five weeks. Granted, by the fifth week mark it will be minimal as the body does most certainly adapt. Due to the body’s ability to adapt, necessarily adjustments must be made. 

The reason you stop seeing effects after about 5-6 weeks is due to the beta-2 down regulation in the body. The best way to combat this is taking a 2-4 week break from using clenbuterol. This should allow the beta 2 receptors to reset giving you the desired effect again. Using clean for longer then 6 weeks at a time will largely decrease the effectiveness of the drug, so clean your cycle accordingly to allow 2-4 week breaks in-between 4-6 weeks of administration of the drug to achieve optimal effectiveness and the most bang for your buck.