Drostanolone Propionate Driada Medical Mastelad 100 is a steroid, the characteristics are very similar to testosterone. This product is very popular with most athletes mastelad, as it turned out, is much stronger than natural methyltestosterone. This drug does not turn into estrogen, even if you overdo it with the dosage. Since this medicine has powerful anti-estrogenic properties. This means that no matter what dose you administer, estrogen levels will not be exceeded. That’s a very good feature. Negative reactions of estrogen don’t trouble sportsmen that use this preparation.