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Clenbuterol is a very unique and fascinating compound that should be taken into consideration. This is not a real steroid hormone, but beta-2 sympathomimetic amine and has a strong anti-catabolic action.

Clenbuterol is effective when it comes to increasing muscle mass and decreasing fat in animals. This is a result of the presence of beta-3 receptors in livestock. These receptors determine an increased secretion and sensitivity of insulin, causing an increased amount of glucose and amino acids to be transported to the muscles that support the skeleton. This is an anabolic effect, which is produced when the beta-2 receptors stop working. Humans, however, have only few beta-3 receptors or none, so this anabolic effect on humans is rarely seen.

Athletes and bodybuilders use the drug due to its thermogenic and anti-catabolic effects. This is down to its ability to slightly increase the body’s core temperature, thereby raising calorie (energy) expenditure. It is thought that a increase yields around a 5% increase in maintenance calories burned. Studies on livestock suggest that clenbuterol also has anabolic properties. However, this seems not to be the case in humans, thought to be due to the fact that humans lack the abundance of beta 3 receptors which increase insulin production and sensitivity.


Drug is usually taken in daily doses of 60-120 mcgs, divided throughout the whole day. You should take it for two days, take a break for other two days, and alternate again and again, for up to 26 weeks. If you take it for fat burning, you can expect it to be effective for 3-6 weeks, while its thermogenic properties will persist even longer. Clen’s anabolic properties subside quicker, in about 18 days.

Clenbuterol use culminate in instant down-regulation of beta 2 receptor thanks to its powerful stimulatory effects. That is why it is meaningless to use Clenbuterol for a long duration without a break. According to most of bodybuilders, two days on and two days off dosing schedule provides decent adequate potential for receptor up-regulation.

Take Clenbuterol exactly as prescribed by your doctor. Clenbuterol exhibits an extremely long half-life in the body, which is measured to be approximately 34 hours long. This makes steady blood levels easy to achieve, requiring only a single or twice daily dosing schedule at most.

Clenbuterol Side Effects

The side effects of Clenbuterol are dose depended. The major ones include headaches, nervousness, insomnia, excessive sweating, hypertension,increased apetite and muscle cramps. The muscle cramps is one of the serious side effects of Clenbuterol. This is presumably because of the reduction of amino acid taurine in the liver. It is recommended to the individuals who faced with muscle cramps after using Clenbuterol; to eat fruits especially banana; to take Taurine supplementation and to take potassium supplementation. It should also be noted that the induviduals who has high blood pressure (hypertension) should avoid from using stimulants such as Clenbuterol.