For the steroid user, this steroid can almost be called essential to an off-season mass plan. But when we look at what it can do for recovery and healing it is almost in a class of its own. Couple this with its side effect friendly nature and this steroid is very hard to beat. However, there’s one important thing we’ve yet to address, erectile dysfunction. Nandrolone is well known for causing erectile dysfunction, often referred to as “ Deca Dick.” This isn’t the hormone’s fault; it is due to improper use. As a progestin and a hormone that can produce prolactin erection function can be diminished. Keep a balance in your hormone levels and there won’t be an issue.