Clen is attractive for it’s pronounced thermogenic effects as well as mild anabolic properties. A number of medical reviews have cited its outstanding potential to promote muscle gains as well as fat loss and weight loss. There has been an increasing number of American bodybuilders that are using this drug regularly.

Many athletes who use Clen claim that it promotes dramatic strength increases and a very noticeable reduction in body fat and weight loss. Some athletes claim that they enjoyed significant gains in muscle mass while using Clen. Clen’s most valid application seems to be as a pre-contest, cutting drug. It is not banned by any athletic committee; thus, numerous professional bodybuilders have used it in the last months of contest preparation. Side effects include nervousness, tremors of the hands, headaches, and insomnia. The reason although it is fairly anabolic, and it promotes the burning of fatty acids through brown fat burning.

Dosages are normally between 20-120 mcg daily. This drug becomes ineffective for its anabolic properties after 18 successive days of use, however, fat-burning and weight loss will continue past the 18 day period. Mostly it is used no more than 18 days, however, some users prolong it to up to 6 weeks. After that, the drug should be discontinued for a couple of months. Although there is quite a bit of medical literature showing Clen’s potential as a bodybuilding drug, most of these studies have been done on animals; very little human data on this issue is available. Therefore, in assessing its effects in humans, you have to rely primarily on empirical and anecdotal evidence. And until recently, there has been little of that available. However, with the recent wide-scale use of Clen by athletes, we can now gather quite a bit of evidence on what the real-world effects of Clen are in weight trainers.

The trick to using Clen successfully seems to be avoiding receptor downgrade which occurs rapidly with the use of this beta-agonist. In fact, one clinical study s owe at receptor downgrade as much as 50% is experienced after using Clen for as little as 18 days consecutively. This same study showed that attenuation can be avoided if Clen is taken in a 2 day on 2 days off pattern. Athletes using Clen in this manner have reported much greater results than those who use the product continually which seems to support the theory that attenuation can be at least partially avoided by staggering the dosage. Athletes have also made a habit of cycling Clen in an effort to minimize side effects as well as prevent receptor downgrade. Average Clenbuterol cycle length is 8-10 weeks with a 4-6 week off period.

To say that Clen use is rampant in bodybuilding right now would be an understatement. Thousands and thousands of athletes are using this drug. There are many pro football players, foreign Olympic athletes, and professional bodybuilders who are using Clen. In addition, we have received feedback from at least 200 other athletes who have experimented with this novel compound. Generally, the feedback from users is that the drug produces dramatic body composition alterations. One Canadian strength coach compared the results he has seen in athletes using Clen to what one might experience while using a stack of Anavar and Halotestin. Within weeks of beginning the cycle, many users notice a significant strength increase and a dramatic reduction in body fat. The results that occur secondary to Clen administration seem to occur equally in men and women as well as young and old.