Clenbuterol is not an anabolic steroid, but rather a stimulant that belongs to a classification of compounds known as sympathomimetics. This classification (or ‘family’) contains other compounds that the average person might be more familiar with, such as: caffeine, ephedrine, albuterol, amphetamines, cocaine, and many others. It is indeed quite a broad drug category, and each of the compounds in this family are related to each other, and more or less carry many similarities and operate in a similar manner through similar pathways. Clenbuterol’s effect on the nervous system involves its interaction with adrenoreceptors, which are located in many different tissues and cell types in the body. When Clenbuterol binds to these adrenoreceptors, different effects in different tissue types (depending on the tissues stimulated) will manifest. One effect in particular that we are concerned with is Clenbuterol’s effect in adipose (fat) tissue.
Clenbuterol is most commonly utilized in cutting, pre-contest, and fat loss cycles. It is very rarely utilized during the off-season or during bulking phases. Some small fraction of Clenbuterol users might elect to use it during bulking phases in a (mostly vain) attempt to stave off fat gain during a bulking period where caloric consumption is much higher than usual, and normally above basal metabolic levels. The truth of the matter here is that those who elect to do this are essentially wasting time and money, as the mechanics of Clenbuterol do not even provide for this effect. As previously explained, Clen is responsible for binding to receptors on fat cells and initiating lipolysis, which is the process of the release of triglycerides stored in fat cells into the blood stream as free fatty acids. These free fatty acids then circulate around the bloodstream throughout the body, and they must undergo the second stage of fat loss: fatty acid oxidation. This means the fatty acids must be shuttled into cells and into the mitochondria to be ‘burned’ off, which cannot occur in any significant amount if caloric consumption is too high.
Clenbuterol cycles can either be run solitarily (with no other compounds) on its own, or stacked with other compounds. Whether or not it is run alone does not change the manner in which Clenbuterol cycles are run. This means that Clenbuterol is either used in the 2 weeks on / 2 weeks off protocol (or for 8 constant weeks with the use of Ketotifen every second week). It is recommended that Clenbuterol not be utilized for more than a 12 week period in order to ensure the body’s cardiovascular and other systems receive an adequate rest from the compound.