Anavar (oxandrolone) is a multi-purpose steroid. Some powerlifters claim that this steroid is Number One for gaining strength without water weight. The use of the low androgenic product makes this quite popular with women, also (see below). Research shows that oxandrolone is the one oral anabolic steroid least likely to cause side effects. A study presented in 2003 at the 39th Annual Meeting of the American Society of Clinical Oncology found no interaction with hormone receptors other than the androgen receptor and no stimulation of human tumors with oxandrolone up to 10 times therapeutic doses.