Halotestin-10 (Fluoxymesterone)

Halotestin is an anabolic steroid with a very strong androgenic activity, derived from methyltestosterone. The clinical purpose of fluoxymesterone consisted originally in the treatment of male hypogenitalism, delayed puberty in men, and in the treatment of breastneoplasms in women.

Due to its specific fluoxymesterone is mainly used by bodybuilders & athletes to enhance the power performance, muscle hardness and aggression without increasing the overall weight; it is used as well in box and other combat sports.

Fluoxymesterone does not aromatize and does not convert to estradiol; however, this is a very potent androgen. Female athletes should stay away from the drug.

Fluoxymesterone has an interesting feature: it activates erythropoiesis (production of red blood cells) and enhances the branching of the capillary network in muscles, and as result of improved blood supply significantly increases strength and endurance.  


  • Chemical Name: 9-Fluoro-17α-methyl-11β,17β-dihydroxyandrost-4-en-3-one
  • Molecular Weight: 336.441 g/mol
  • Formula: C20H29FO3
  • Anabolic Rating: 1900
  • Androgenic Rating: 850
  • Dosage Men : 10 - 40mg/Day
  • Dosage Women : NA
  • Active Half-Life : 4-9 days
  • Detection Time : 5-8 weeks
  • Hepatotoxicity : High


Fluoxymesterone mimics the action of endogenous androgen hormones, just like most other androgenic and anabolic steroids.

Upon binding to androgenic receptors in various body parts, halotestin or fluoxymesterone stimulates cells responsible for synthesizing proteins.
In addition, it controls protein synthesis, which means that it increases the production of some proteins and decreases the production of others that are not necessary.

As a result, many essential elements are retained, such as phosphorous, potassium, sodium, nitrogen, and many other chemicals.

There is also evidence that the Fluoxymesterone cycle induces anabolism of proteins and inhibits amino acid catabolism.

It also decreases Calcium excretion through the urine, thereby balancing the nitrogen cycle as a result of all of these parts of the process.


About 19 times more potent than testosterone, fluoxymesterone has a lot of anabolic properties. However, it can be misleading for beginners or uninformed steroid users who automatically think that this extensive anabolic profile will make you gain much weight. Despite fluoxymesterone massive anabolic rating, it doesn't transfer its anabolism very well to the body.

If you take fluoxymesterone, very little of this anabolic property will be visible. Instead, this steroid's most unique property is its androgenic nature. Here, it is rated as 8.5 times stronger than testosterone in androgenic strength, which is why its side effects are so strong.

Based on these factors, we can examine the possible effects and fluoxymesterone steroids benefits:

Energy and Strength :

Usually, fluoxymesterone is used by bodybuilders for its powerful effects on strength and energy, which are mainly attributed to the increased functions of red blood cells.
The added strength will help any athlete achieve new levels of performance. However, it can also increase aggression overall, making it more suitable for powerlifters, fighters, etc.

Lose weight :

Despite its lack of specific effects or power in this area, it can still contribute to fat loss. However, the impact will only be visible if you are already lean. If you haven't already lost significant amounts of body fat through previous cutting phases, fluoxymesterone is unlikely to affect fat loss.  

Aggression :

Fluoxymesterone users value increased aggression as a benefit despite being considered a negative side effect. Those who require additional drive and energy to engage in particular pursuits like fighting and powerlifting are most likely to be in this group. As long as this aggression is put to good use, fluoxymesterone users do not see it as a problem.

It should be noted, however, that those who tend to struggle with mood issues or anger issues outside of the competitive environment where this trait is highly valued may have worsened these tendencies.

When you first start using the fluoxymesterone cycle stack, a low dose will allow you to monitor your aggression level and how you cope. Your dosage can then be adjusted accordingly.

Competition preparation :

As part of the pre-contest phase of training, where food is highly restricted and strict, fluoxymesterone is often used to help people through the most challenging times. Just before a contest, fluoxymesterone can help you push through the most difficult times with extra energy.

Furthermore, competitors will receive a boost in definition and hardness before a competition, thanks to enhanced physical conditioning. Of course, you have to have already a very lean body and a deficient body fat level to reap the benefits of fluoxymesterone in this area. For the average bodybuilder, this will not be possible. Nevertheless, physically fit athletes will value the contribution fluoxymesterone can make to this training phase.