Fluoxibol 5 (Fluoxymesterone 5 mg)

Fluoxibol 5 (Fluoxymesterone 5 mg) is Evolve Biolabs' high-potency oral androgen, supplied as 100 tablets in sealed blister strips. It is one of the most androgenic oral steroids ever developed, non-aromatising and historically used for androgen replacement and anaemia.

What Fluoxibol 5 Is

Fluoxymesterone is a 17-alpha-alkylated oral anabolic androgenic steroid bearing a fluorine atom at carbon nine and a hydroxyl group at carbon eleven. Those modifications increase its resistance to hepatic breakdown and its affinity for the androgen receptor. It does not aromatise, so it produces no oestrogen-driven water retention. Fluoxibol 5 supplies the classic 5 mg Halotestin strength across 100 tablets.

The History of Halotestin

Fluoxymesterone was developed by Upjohn in the 1950s and introduced as Halotestin for androgen deficiency, delayed puberty and certain anaemias. It was also used in breast cancer palliation. Its extreme androgenic potency gave it a reputation as a strength and aggression compound in physique research from the 1960s onward. It remains a controlled substance and a standard reference point in steroid pharmacology.

How It Works

Fluoxymesterone carries the 17-alpha-alkyl group that lets it pass through the liver intact, which is why the tablet is pharmacologically active at all. Once in circulation it occupies the androgen receptor with high affinity, generating strong androgenic signalling in muscle and skin. The molecule has no route to oestradiol, so it leaves oestrogen levels untouched. Hepatic metabolism and urinary excretion clear it, and the same alkylation that enables oral absorption is what makes the liver the organ of concern.

What the Research Shows

• Fluoxymesterone was studied clinically for hypogonadism, anaemia and breast cancer.
• Its strong androgen-receptor binding and lack of aromatisation are well documented.
• Research on 17-alpha-alkylated steroids has characterised their hepatic metabolism.
• Comparative work places it among the most androgenic oral compounds by weight.

Research Context

Fluoxymesterone's structure explains its behaviour. The fluorine and hydroxyl modifications increase metabolic resistance and receptor affinity, while the 17-alpha-alkyl group allows oral absorption at the cost of hepatic burden. Studies of alkylated steroids have documented liver-enzyme elevations and, with prolonged exposure, more serious hepatic changes. Analytical work has also mapped its urinary metabolites for doping control. Potency and hepatic stress are the two themes that dominate its literature.

Strength, Pack and Authentication

Each tablet contains 5 mg of fluoxymesterone, with 100 tablets per pack. The tablets are sealed in moisture-resistant blister strips inside a printed, tamper-evident carton stating the compound, strength and tablet count. A verification code on the packaging allows the pack to be checked against Evolve Biolabs' records, and the blister format keeps each 5 mg tablet sealed until use.

Buying Fluoxibol 5 Online

Halotestin remains one of the most searched high-potency oral androgens. If you are researching fluoxymesterone, comparing 5 mg Halotestin-style products or looking to buy Fluoxibol 5 online from a verified Evolve Biolabs supplier, this page gives you the full specification, pack size, price and live stock status. Browse more Evolve Biolabs orals at NotNatty.