Many anabolic steroids undergo a process of aromatization with the formation of female sex hormones - estrogens (mainly estradiol), less often the cause may be prolactin and progestogens. When a sufficiently large amount of female hormones accumulates in an athlete's body, he begins to notice side effects such as female-type adipose tissue deposition, swelling due to fluid retention and gynecomastia.
Not all athletes using steroids show gynecomastia and other hyperestrogenism phenomena, since everyone has different sensitivity to the female hormone estradiol. For some, undesirable effects may occur even from 10 mg of Danabol per day. While others will not have such problems from 1 g of testosterone per week. It depends on the genetic data determining aromatase activity.
- Drugs that turn into estrogens: testosterone (all esters), methandrostenolone (danabol), methyltestosterone.
- Progestin drugs that increase prolactin: nandrolone, trenbolone.
Symptoms of gynecomastia when using steroidsIt is usually easy to determine the onset of the disease. If you feel irritation in the area of the mammary glands, itching around the nipples, palpable swelling under the nipple, and/or transparent discharge occurs from the nipples, then this most likely indicates gynecomastia.