Boldenone: description and effects of use


Boldenone Undecylenate by Ergo is an androgenic and anabolic steroid in liquid form. It is available in 10 ml bottles with a dosage of the active ingredient 300 mg per 1 ml. The drug is designed for qualitative growth of muscle mass and a significant increase in strength.

The main active ingredient of the drug is the synthetic steroid boldenone undesylenate. Its chemical formula is represented by a testosterone molecule, modified so that a double bond appeared between the first and second carbon atoms. Thanks to this improvement, the androgenic activity is significantly reduced, while the anabolic factor remains equal to that of testosterone.

The steroid profile of the drug is expressed by the following indicators: anabolic and androgenic index – 100% and 50% of testosterone respectively, no toxicity to the liver, insignificant estrogenic activity. The steroid has a duration of action of 36 hours, the detection time in a doping test is up to 2 months.


The effects of taking Boldenone Undecylenate Ergo are expressed in the following:

  • Qualitative building of muscle mass over a long period of time, thanks to which the hormonal background of the athlete is kept at an optimal level without the need for frequent injections.
  • Significant increase in strength;
  • Improved healthy appetite for effective training;
  • activation of the hematopoiesis process to increase red blood cell mass. As a result, the muscles receive oxygen more actively and in greater quantities, which leads to an increase in endurance.

How to use

The course of Boldenone Undecylenate lasts from two to two and a half months. The dosage varies from 400 to 800 milligrams of the active substance. Going beyond these limits is not recommended: a smaller amount of steroid will not give the necessary effect, and more will significantly increase the risk of side effects.

How to take Boldenone Undecylenate in combination courses

Boldenone combines perfectly with Anavar and Vintrosrol on drying courses, with Trenbolone and testosterone on “mass”. The combination course lasts no longer than a month and a half, because the mixture of steroids significantly suppresses the body’s production of testosterone. During the reception of several AAS at once, it is recommended to connect anti-estrogens. For maximum effect, it is necessary to follow a diet and take sports nutrition.

Side Effects of Boldenone

There are many potential side effects that can result from taking boldenone, some of which can be severe. The most common side effects are acne, increased body hair growth, male pattern baldness, increased aggressiveness, and gynecomastia. In addition, it can also cause increases in blood pressure, changes in cholesterol levels, liver damage, and suppression of the body’s natural hormone production.


A common side effect of taking boldenone is an increase in acne breakouts as well as other skin issues. It increases the production of sebum, an oily substance secreted by the skin, which can clog pores and lead to breakouts. This is most common on the back, chest, and shoulders but can occur on other parts of the body as well.

Male Pattern Baldness

Another possible side effect of using boldenone is male pattern baldness. This is caused by the hormone dihydrotestosterone (DHT), which is a derivative of testosterone. Boldenone use can cause an increase in the production of DHT, which can lead to hair thinning or even hair loss.


Gynecomastia, also known as “man boobs,” is a potential side effect of taking boldenone. This occurs when the body starts producing more of the female hormone estrogen. This can cause the breasts to grow in size and can even lead to other male breast tissue development.

Liver Damage

Boldenone can also lead to liver damage. It is a hepatotoxic compound, meaning it can cause inflammation, scarring, and ultimately damage to the liver. Long-term use or high doses can increase the risk of liver toxicity.

Suppressed Hormone Production

Lastly, one of the most significant risks associated with taking boldenone is that it can suppress the body’s natural hormone production. This can lead to a decrease in testosterone levels, which in turn can lead to decreased strength, libido, and energy levels as well as an increase in body fat.

Storage Conditions

Store in a closed, cool, protected from light, out of reach of children.


Boldenone is an anabolic androgenic steroid (AAS) that many bodybuilders and athletes use off-label to improve performance. It can increase muscle mass and strength, but it can also cause a variety of side effects, some of which can be very serious. The most common side effects are acne, increased body hair growth, baldness, increased aggression and gynaecomastia. In addition, the drug can cause increased blood pressure, changes in cholesterol levels, liver damage, and suppression of the body’s natural hormone production. It is important to understand the possible side effects of boldenone before considering taking it, and only use it under the guidance of a medical professional.

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