This popular prohormone to testosterone was banned for sale in early 2005. It converted to testosterone at about 15-40% and was a very common prohormone in many products. It was introduced to the market by Patrick Arnold and was supposed to be an improvement over 4-androstenedione because it had less chance of being converted to estrogen and additionally, had some intrinsic anabolic activity.
4-Androstenediol was never a potent prohormone on it’s own, but was commonly stacked with other prohormones like 1-Androstenediol because it was a “wet” prohormone. The term “wet” means that it could convert to estrogen and added in some blood pressure lowering qualities along with a small amount of bloat.
4-Androstenediol was sold in 25-250 mg capsules and the typical dose required to have an effect was typically about 600mg. It was never considered a huge mass builder on it’s own, but it was one of the most popular prohormones on the market.
Long before improvements in the understanding of prohormone conversion, 4-Androstenediol was introduced in a variety of delivery systems that improved it’s bioavailability. Topical 4-Androstenediol and sublingual 4-Androstenediol were very popular because they passed the intestinal tract and provided better converstion to testosterone. 4-Androstenediol esters and ethers were also popular, since these functional groups gave the hormone the abilty to be picked up by the lymph fluid and delivered in a much better way than standard 4-Androstenediol that was absorbed orally in the gut.
The side effects of 4-Androstenediol were bloating, hairloss, possible gynocomastia and agression. These side effects were common, due to the lack of understanding about prohormone conversion. 4-Androstenediol is still legal in some countries and may still be found there. It was never the best choice as a prohormone, but it was a significant advancement over standard dione preperations.