Is Clenbuterol Anabolic? (Does it Build Muscle)

Is Clenbuterol Anabolic? (Does it Build Muscle)

Clenbuterol is categorized under the sympathomimetic group of substances, which means it mimics the way adrenaline and noradrenaline function in the body. Bodybuilders take clen frequently during cutting cycles to improve muscle tone and lower their body fat.

BUT, can clenbuterol build muscle too?

Read on to find out!

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How Clenbuterol Works

Clenbuterol has thermogenic properties that are beneficial for both athletes and bodybuilders, as it not only causes a significant rise in core body temperature (promoting fat loss); but also increases your body’s ability to absorb glycogen.

Since clenbuterol aids in the release of glycogen as glucose into the bloodstream, your body won’t be able to assimilate or store the glycogen. As a result, protein and fat molecules are now used to produce energy, effectively turning your body into a fat burning furnace.

This enables users to lose body fat and also gain muscle as it improves the body’s aerobic capacity. Clen helps in transporting oxygen throughout the body by increasing blood flow and blood pressure. Better blood flow and oxygen delivery is beneficial for athletes doing endurance training.

Can Clenbuterol Build Muscle?

Controlled scientific studies on animals have shown that clenbuterol CAN cause noticeable gains in muscle mass.

However, although clenbuterol is somewhat anabolic – it only causes small increases in lean body mass when taken in humans. That’s what steroid-users say who have taken clenbuterol during a cut to get more ripped.

So, unless you’re a horse…don’t expect to turn into Ronnie Coleman by just taking clenbuterol.

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Dosage instructions 

The right dosage to use varies dramatically from one individual to another, given that the metabolic system usually adapts to a substance – based on its fat-burning properties. Nevertheless, in some cases doses must increase accordingly as a person gets deeper into a cycle (and starts to build a tolerance to clen).

Standard dosage for women is 2-4 tablets a day, whereas for males it’s 2 to 8 tablets per day. The user’s ultimate goal can often determine how long to cycle Clenbuterol. For instance, if fat loss is the main goal (before building muscle) then clen should be taken 4 to 6 weeks at best, while watching out for fluctuations in core body temperature. Beginners also might like to cycle clenbuterol by taking it for 2 weeks, followed by 2 weeks off. This is a pretty standard Clenbuterol protocol, ensuring maximum safety.

It’s recommended that medication amount should be adjusted over time so that users can gauge their tolerance levels accordingly. This can be achieved by moderately increasing your dosage on a daily basis until you hit a dosage which is helping you burn fat at the rate you want – without posing any more side effects.

Only use clenbuterol under expert supervision, in which case you’ll have guidance when you’re thinking about upping the dosage or extending the duration of your cycles. This way you won’t be doing it blindly/naively.

Such protocols can alleviate any bad side effects of Clen that you might hear about in the media. Especially in terms of its the effect on blood pressure.

Nevertheless, since this drug is thermogenic and works mainly by increasing the body’s temperature, when used over a lengthy period of time one may develop resistance to it thus leading to fallen body temperatures.

Even taking more of the substance, or consuming it for longer duration’s won’t be effective, since the body would have already developed enough resistance to render it ineffective. The only solution is stopping usage for a certain amount of time so that the body can readjust itself and recognize the drug again.

Maximizing Clenbuterol’s Effects

To increase Clen’s ability to burn fat and gain muscle, the drug can be taken together with Cytomel, also known as T3 which is a thyroid hormone. This effective combo is often used by bodybuilders to remove excess fat from the body during a cutting cycle.

It’s also normal to use Clenbuterol alongside other anabolic non-aromatizing steroids, these are medications that don’t cause water retention within the cells thus allowing ingested drugs to work more synergistically.

When used together with anabolic steroids, Clen will give you lean, ripped and striated muscles.

Possible side effects 

Some common side effects of this drug are insomnia, headaches, restlessness, and increased pressure.

Moreover, physicians recommend that it shouldn’t be used by anyone who’s been diagnosed with cardiovascular problems before. This is because using Clen for long durations of time may cause expansion of the heart.


Clenbuterol certainly has anabolic qualities when used in the correct way, bodybuilders also take it to improve muscle definition, as well as aiding fat loss. Its thermogenic properties ensure that the body burns up fat quickly to produce energy. For the best results, this drug should be taken in proper doses depending on the person’s body needs.

But in short: yes, clenbuterol can build muscle…just don’t expect it to build as much mass as if you were taking bulking steroids.

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Llewellyn, William (2011), Anabolics. Jupiter, FL: Molecular Nutrition. pp. 899-904.

O’Connor M.D, Thomas (2018), America on Steroids: A Time to Heal. Cheshire, CT: Metabolic Promotion LLC. pp. 103-106.

Written by Juice Guru
Juice Guru is a bodybuilder with over 30 years of experience when it comes to steroids and performance enhancing drugs. Juice Guru uses as a platform to share his/her expert knowledge.

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