A 2006 review paper summarized several studies that examined the effect of androstenedione on strength training.[11] At dosages of 50 mg or 100 mg per day, androstenedione had no effect on muscle strength or size, or on body fat levels.[11] One study used a daily dosage of 300 mg of androstenedione combined with several other supplements, and also found no increase in strength when compared to a control group that did not take the supplements.[11]