Andriol is a revolutionary steroid because, besides methyltestosterone, it is the only effective oral testosterone compound. Testosterone itself, if taken orally, is ineffective since it is reabsorbed through the portal vein and immediately deactivated by the liver. How it works The substance testosterone undecanoate contained in Andriol, however, is reabsorbed from the intestine through the lymphatic system, thus bypassing the liver and becoming effective. The liver function is not affected by this. Testosterone undecanoate is a fatty acid ester of the natural androgen, testosterone, and in the body is for the most part transformed into dihydrotestosterone, a metabolite of testosterone. For this reason Andriol aromatizes only minimally, meaning that only a very small part of the substance can be converted into estrogen, since the dihydrotestosterone does not aromatize. The users of Andriol therefore do not experience feminization symptoms such as gynecomastia or increased body fat. This makes it a welcome alternative for athletes who have problems with the common injectable testosterone compounds. Due to this, Andriol is also suitable for pre competition workouts. An additional advantage of Andriol is non-aromatizing quality consists of the fact that the body's own hormone production is only affected after a long-term administration of very high dosages. Andriol has only a low inhibitive effect on the hypothalamus so that the release of LHRH (luteinizing hormone releasing hormone) is rarely influenced. This is very important since-as we know-LHRH stimulates the hypophysis to release gonadotropine which causes the Ledig's cells in the testes to produce testosterone.