GP Test U contains 250 mg of Testosterone Undecanoate per ml.The active substance is Testosterone Undecanoate which is an ester of the naturally occurring male hormone testosterone. Its effects are the same as of any other testosterone. Taking GP Test U user will experience more sex drive, more endurance at training sessions, strength, energy thus more muscles. His results in lifting weights will get higher. Another good thing is good mood you will have being on testosterone. That is why testosterone is so popular between athletes.The main difference between GP Test U and other testosterones is that the first one is long acting testosterone which means less frequent shots will be taken.The half-life of GP Test U is about 17-23 days1 which makes it ideal for those on HRT. Testosterone is a must product for 92% of your steroids cycle.A good stack would be GP Test U with Nandrolone Decanoate and Methandienone.