DECA is a new and strong pro-hormone, which was introduced onto the market by the company Warrior Labz. It does not convert into estrogen metabolites and it has affinity to receptors of progesterone. Due to these qualities, you do not have to be afraid of any spillover effects caused by estrogen. It belongs to the category of pro-hormones, which are extremely strong and effective, as well as toxic. In general, DECA-STEN will ensure you growth of a huge muscle mass and will increase your strength, as well as your overall physical form in the gym.