Clenbuterol as a fat loss agent
Researched and composed by Vic Goyaram
Researched and composed by Vic Goyaram
Clenbuterol: the new wonder 'mainstream' weight-loss drug
Clenbuterol (henceforth, Clen, for short) very often features in
the fat burner arsenal of experienced competitive bodybuilders who probably
have a decent understanding of the effects and side effects of the drug. However,
I have recently been alarmed at the number of questions about Clenbuterol that I have received from a number of people who are most likely unaware of the basics of fat loss dieting and who
have probably been told by their peers in the gym to use pop some Clen tabs to
get ripped. In the pharmacies where I work part-time I often get women who
come looking for Clen and Anavar for fat loss.
This article is intended to give you a background
on Clen, its effects and side effects in order to help you make an informed
decision. I have personally never used
Clen and most of my experience comes from my understanding of biochemistry,
pharmacology, physiology and my interaction with people who have used it
for its physique enhancement effects.
The regulatory status of Clenbuterol
"Clen is not approved for human use in the US"
In the USA, Clen is not approved for human use even for medical purposes. It is only approved for use in horses suffering from respiratory problems. Clen is not intended for human use or for use in food producing animals in the USA. Outside the U.S., Clen is available on prescription for the treatment of breathing disorders like bronchial asthma in humans. Livestock producers in countries like Mexico and China use Clen in animals to improve meat quality. Clen is available in tablets (0.01 or 0.02 mg per tablet) and liquid preparations as Clenbuterol hydrochloride.
"Clen is listed as a banned substance by the WADA and natural bodybuilding federations"
Clen is listed by the World Anti-doping Agency (WADA) as a performance enhancing drug. Some natural bodybuilding federations like the International Natural Bodybuilding Association (INBA) list β-2 agonists like Clenbuterol and Salbutamol on their banned substances list as they follow the WADA protocol.
Basic pharmacology of Clenbuterol
In the USA, Clen is not approved for human use even for medical purposes. It is only approved for use in horses suffering from respiratory problems. Clen is not intended for human use or for use in food producing animals in the USA. Outside the U.S., Clen is available on prescription for the treatment of breathing disorders like bronchial asthma in humans. Livestock producers in countries like Mexico and China use Clen in animals to improve meat quality. Clen is available in tablets (0.01 or 0.02 mg per tablet) and liquid preparations as Clenbuterol hydrochloride.
In the US Clen is allowed only as a veterinary drug |
"Clen is listed as a banned substance by the WADA and natural bodybuilding federations"
Clen is listed by the World Anti-doping Agency (WADA) as a performance enhancing drug. Some natural bodybuilding federations like the International Natural Bodybuilding Association (INBA) list β-2 agonists like Clenbuterol and Salbutamol on their banned substances list as they follow the WADA protocol.
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Basic pharmacology of Clenbuterol
The chemical structure of Clenbuterol |
Stimulation of these β-2 adrenergic receptors gives rise to effects like:
- Smooth muscle relaxation in the bronchi (bronchodilation). The main pharmacological use of Clen, asthma treatment, is in fact based on this effect.
- Fat breakdown in adipose tissue (triglycerides broken down into fatty acids that can be oxidised) hence it's effect as a cutting drug.
- Dilation of arteries that lead to skeletal muscle, allowing more efficient oxygen transportation to muscles.
- Stimulation of anabolism in muscle (relevance of this effect in humans will be discussed below).
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A. Thermogenic and stimulant effects
Clen is used at about 60-120µg per day by bodybuilders often in combination with other fat burner drugs like the thyroid boosting drug T3, Yohimbine and Ephedrine/ Caffeine/ Aspirin (ECA) stack. The dosage is split in several intakes of 20µg. First time users generally test their sensitivity to Clen for determining the dosage. Clen is a fast acting drug and results come very fast, nearly immediately. An increase in body temperature is generally noted which is typical of Clen's well-known thermogenic effects.
Clen is used at about 60-120µg per day by bodybuilders often in combination with other fat burner drugs like the thyroid boosting drug T3, Yohimbine and Ephedrine/ Caffeine/ Aspirin (ECA) stack. The dosage is split in several intakes of 20µg. First time users generally test their sensitivity to Clen for determining the dosage. Clen is a fast acting drug and results come very fast, nearly immediately. An increase in body temperature is generally noted which is typical of Clen's well-known thermogenic effects.
B. Receptor down-regulation
The body gets used to Clen fairly rapidly because the beta receptors are rapidly down-regulated. This means that the number of receptors decrease in response to the excess of beta-agonist (Clen), a usual response of the body. That is why Clen is generally used for relatively short periods of time, usually 4-6 weeks and use drugs like Ketotifen to try keep the receptors up and running.
When the body sees too much Clen (beta-agonist), it will decrease the number of beta-receptors as a means of protecting itself |
C. Anabolic effects
I would like to elaborate a lot on this one because a lot of
people have asked me about the anabolic effects of Clen because they have read about it and thus want to use Clen to avoid the side effects (including injection pain) of steroids. Stimulation of the
beta-2 receptors activates anabolic pathways in skeletal muscle and is the
mechanism by which Clen exerts its anabolic effects. Besides its effects on fat loss Clen may also
produce a mild anabolic effect. I know you must be thinking "Hell yeah, I
found what I wanted! Losing fat while putting on a bit of muscle!". Please
be warned that while the mechanism of beta-2 agonist anabolism is well established these effects may not happen with the doses used in humans. Let me tell you why:
The anabolic effect of Clen has been found in animals
and not in humans. In these studies large amounts of Clen were used which is
far in excess of what is safe for human consumption and what is recommended for
bronchodilation. In a study by Choo and colleagues (1992), an anabolic effect
was seen in rats that were given 4mg of Clen per kg of bodyweight. This means
400mg Clen for a 100kg person. Now remember that common doses for fat burning
is 60-120MICRO grams per day. Be careful not to extrapolate animal data to
humans especially unsupervised drug usage. Some people I know have reported that they retain muscle very well on clen but then they were also using anabolics like Winstrol and Equipoise so they real anabolic contribution of Clen cannot be determined.
Below are two good review articles on the topic of Clen
use to increase muscle mass and both come to the agreement that knowledge of
the effects of Clen on muscle come from animal (laboratory or slaughter stock)
experiments and not human data and therefore cannot be extrapolated to humans.
Experiments on the safety, efficacy and cardiovascular side-effects are needed.
Side effects
Although the reported fat burning effects of Clenbuterol are fantastic it doesn't come without a share of serious side effects. These side effects can be classified as follows:
Although the reported fat burning effects of Clenbuterol are fantastic it doesn't come without a share of serious side effects. These side effects can be classified as follows:
- Psychological side effects: As Clen is a nervous system stimulant emotional side effects are known to occur with its use. Many people report severe nervousness, paranoia and anxiety. Tremors are also very common and this reduced one's ability to perform physical tasks like writing, typing and holding objects. Insomnia may also result from Clen use especially when you have built up your dose. People who already suffer from psychological disorders like depression and anxiety are most likely to be at greater risk to experience the psychological side effects of Clen. Should you fall under such category it is best to speak to your medical practitioner before taking Clen. Do not play with your mental health.
- Short and long term cardiovascular side effects: Clen users report that cardiovascular side effects appear quite rapidly. These side effects include tachycardia (heart palpitations) and high blood pressure and the headaches that accompany these. In some users these side effects have been enough to get them to quit using Clen. In experiments using rats, the long term use of Clenbuterol has been to cause an infiltration of collagen fibres in the heart wall. Collagen stiffens the heart muscle and reduces its functionality. Most Clen use is unsupervised and its consequences in people with pre-existing heart conditions and hypertension are not to be taken lightly. Taking Clen under these conditions can be a tragedy waiting to happen. There have been cases of sudden death with Clen use.
- Cramps: Clen is known to cause some bad cramps because it depletes the amino acid taurine. Taurine supplements help against Clen-induced cramps.
"Jumping" on Clen
First of all, I do not
recommend Clenbuterol as a fat burner is you haven't mastered the basics of
dieting like sorting out your diet and exercise program. Do not think you can get away by popping Clen tabs on a poor diet. Do not look shortcuts and rather educate yourself. Do not listen to the guy who is selling you Clenbuterol and telling you "just drink this" without even talking about a proper diet strategy with you and asking about your medical history. Clen isn't your typical fat burner sitting on the shelves in the supplement store. Clen is serious business. Most of the questions about Clen use that I have received are from people who are clueless about their own nutrition. Imagine my horror when they also told me that they are doing endless sit-ups with no results and cannot answer me about the approximate number of calories they consume. I hope this article has shed some light on this topic. For those who want to learn more about dieting basics I will recommend the following two articles. Please read them carefully to know how your eating should be like before considering the use of Clen. They are written by two of my role models, Doug Brignole and Dr. Layne Norton.
The Ultimate Cutting Diet – Devised By Pro Natural Bodybuilder Layne Norton
References
Choo J.J, Horan M.A ,Little R.A, and Rothwell N.J. Anabolic effects of Clenbuterol on skeletal
muscle are mediated by beta 2-adrenoceptor activation. Am J Physiol Endocrinol
Metab July 1, 1992 263:(1) E50-E56
Prather ID, Brown DE, North P, et al. Clenbuterol: a substitute for anabolic steroids? Med Sci Sports Exerc 1995 Aug; 27(8):1118-21
Spann C, Winter ME.Effect
of Clenbuterol on athletic performance. Ann Pharmacother. 1995 Jan; 29(1):75-7.
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well thnks buddy for the info
ReplyDeleteGood Stuff Vic, thanks for posting the side effects. I would avoid Clen like the plague. Caffeine is safer and if used wisely can help you with your cutting. I know of a Prominent Cardiologist who does bodybuilding also and he would not touch Clen due to irreversible Heart Chamber damage and tachycardia requiring long term beta blockers or pacemaker.
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