Finasteride is an active substance that is most commonly sold as the brand name Proscar or Propecia. Other brand names are available, but these 2 are by far the most popular ones for Finasteride. This is a very powerful 5 alpha-reductase inhibitor of type II and the compound is known for preventing the conversion of testosterone to dihydrotestosterone (DHT).

In short, Finasteride is going to lower the levels of dihydrotestosterone (DHT) in a similar way as Aromatase Inhibitors (AIs) such as Arimidex (Anastrozole) lowers the levels of estrogen by preventing testosterone to convert into estrogen.

However, DHT (dihydrotestosterone) and estrogen are 2 very different hormones. DHT is a sex hormone and is very important for males.

Finasteride is a medication known for helping males to prevent or treat male pattern hair loss. Plus to that, the compound can be used for treating benign prostatic hyperplasia (BPH). A condition called when a male suffers from prostate enlargement.

  • Yet, Finasteride (Propecia or Proscar) is also used by bodybuilders and anabolic steroid users. That’s because the compound is going to be helpful at protecting head hair.


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The compound is used as hair loss prevention similar to Exemestane being used as gynecomastia prevention during the use of anabolic steroids cycles.

Finasteride Uses

Finasteride is mostly known as Propecia and Proscar brands despite both of them being manufactured by the same company – Merck. Both brands were approved by the FDA in the 1990s and both contain the same active substance.

  • The difference is that Proscar contains 5 mg of Finasteride per tablet therefore is used for Benign Prostatic Hyperplasia in medical settings.
  • But Propecia contains 1 mg of Finasteride per tablet thus used for treating male pattern hair loss.

How Finasteride Works?

By inhibiting 5alpha reductase enzymes – testosterone is not converted into DHT. Therefore, dihydrotestosterone levels can be reduced by up to about 70% in the body when using Finasteride.

In the prostate, levels of DHT can be suppressed even more!

Finasteride in Bodybuilding


Approximately 5% of testosterone in males is being converted into dihydrotestosterone under normal circumstances. However, when a person uses anabolic steroids, and especially dihydrotestosterone (DHT) derived compounds, the amount of DHT hormone in the body is going to spike! Like for example Masteron (Drostanolone), Winstrol (Stanozolol), Proviron (Mesterolone), and others.

What does DHT have to do with hair loss and why Finasteride is helpful to prevent it? Because DHT is actually the “enemy” of head hair. DHT is the hormone known to shrink hair follicles in the head. Normally, this hormone is mostly found in men, that’s why it is common for men to lose head hair but is not for women.

So, testosterone is converted into DHT. That’s why basically all anabolic – androgenic steroids (AAS) are known to speed up hair loss in males prone to get them. But especially when talking about DHT derived ones.

Although it may sound amazing – running steroids and still being able to keep your hair, you should know that there are nasty side effects that may occur. So you should carefully read about them.

Finasteride Dosage

Is important to know that females are not recommended to use Finasteride at all. It may be given to males wishing to transit to female transsexual, combined with estrogen. But women don’t have any uses and shouldn’t run it.

When Finasteride is given for a medical condition, we highly recommend it to be used exactly as recommended by the doctor. Finasterida-Balkan-Pharmaceuticals

Usually, that’s 1 mg a day for 6-12 months for hair loss (male pattern baldness). And 5 mg daily for an even longer period for BPH.

That’s why Finasteride comes in tablets of 1 mg and 5 mg.

Bodybuilders and anabolic steroid users looking to prevent hair loss are usually running 1 mg a day for the duration of the cycle. However, they should do it only if they are sure they want to run Finasteride due to its side effects.

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Split a 5 mg of Finasteride tablet into smaller pieces or use it less frequently than once a day!

Finasteride Side Effects

Is very important to run Finasteride in a lower dosage because the side effects of this compound can be really nasty and they can be long lasting, even if you’ve been running it for a short period of time only. This is a very important androgen hormone for males. Reducing DHT (dihydrotestosterone) for too long periods or too much may lead to bad symptoms.

That’s why it is highly recommended to run Finasteride only if that’s absolutely necessary.


Anyway, check some of the most common side effects of Finasteride:

  • Erectile dysfunction (ED)
  • Decreased libido and sex drive
  • Impotence
  • Decreased muscular mass and strength
  • Affected mood, well being and may even lead to depression

If you’re sure you need Finasteride for whatever reason, make sure to use it properly and get the best quality compound directly from

You’ll save money and get the best quality product ensuring it is going to work exactly as it should.

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