How after just one testosterone injection your endogenous testosterone production plummets

[Nelson Vergel]

The effect of using synthetic testosterone on the testosterone your own body produces is bigger than doctors think, according to Swedish endocrinologists at the Karolinska Institutet. The Swedes wrote about the study they did for WADA in Substance Abuse and Rehabilitation.
Study
The researchers gave 25 men aged between 27 and 43 single injections of 125, 250 or 500 mg testosterone-enanthate on three different occasions. In the weeks that followed the researchers analysed the blood of their subjects.

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