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Tetrahydrogestrinone is a modified gestrion to which four hydrogen atoms have been added. The designer steroid gained its dubious glory in October 2003, when the USADA (United States Anti-Doping Agency) proved the use of a doped athlete for the first time.

The USADA has become aware of tetrahydrogestrinone by referring to a renowned athletic trainer, who gave the USDA a used syringe with the steroid.

Newspapers reported that the scale was a conspiracy of chemists, coaches, and athletes who believed they could cheat fellow competitors and the world’s public with an undetectable designer steroid. The case of tetrahydrogestrinone is probably the largest doping scandal with the most participants. Many of the doped athletes lost their┬ámedals and world records after it was sure they were doped.

According to the anonymous counselor, tetrahydrogestrinone was developed by Victor Conte, the founder of the Balco laboratory in Burlingame, California.

Side effects:

Blood in the urine, increase in aggressiveness, acne, hair growth, hair loss, sleep disorders, libido, excessive sweating, gynecomastia, weakening of the immune system

Application / dosage:

A few drops of tetrahydrogestrinone were dripped under the tongue. 5-10 mg active ingredient / day.
In the professional area, dosage indications of 0.2 – 2 mg / kg body weight are to be found.
However, all data on this design steroid are too isolated, as the representative dosages could be determined from this.
Post cycle therapy with tamoxifen citrate or clomiphene citrate is necessary

The dosage information given here is not intended as a dosage recommendation or medical advice. These are statements by bodybuilders who have used or used these active ingredients. The dosages should never be regarded as generally valid. If you are using the idea of using steroids or similar, ask a doctor or pharmacist.

Doping information:

Tetrahydrogestrinone is a doping agent and is prohibited by the IOC. Even before the official listing it was forbidden as it is an anabolic steroid.

Schwarzmarkt / Availability:

Tetrahydrogestrinone is not available on the black market, exact prices are therefore unknown. Prices are priced between 50 and 60 euros for a 10ml ampoule with 60mg / ml active ingredient.


Tetrahydrogestrinones, THG, THG 60, The Clear

Trade Name / Manufacturer:

[-] / BALCO, USA
There are no official manufacturers

Chemical information:Tetrahydrogestrinon - Tetrahydrogestrinone - Molekularformel

Molecular Formula: C21H28O2
Molecular weight: 312.46 g / mol
Half-life: Unknown

(13S, 17S) -13,17-diethyl-17-hydroxy-1,2,6,7,8,13,14,15,16,17-decahydrocyclopenta [a] phenanthren-3-one