I remember reading that some gear is contraindicated when using with other gear. I can not locate the article, but it was something to do with hitting the same receptors twice. Specifically, my friend was wondering if d-bol would be ok to add to a cycle of test cyp, tren, and eq? Does anyone know if adding d-bol will cause competition for the same receptor used by one of these substances. Also, does anyone know of any other substances that would be redundant to use at the same time?