
Originally Posted by
Swifto
Its a myth that Test needs to be run higher than Deca, but shouldnt really be run below IMHO. HCG should also be used to keep the testes functioning.
Nandrolone's (Deca/NPP) ability to cause such rapid HPTA shut down is mainly due to its structure. Its also a full agonist of the progesterone receptor. That will almost certainly wosen things, or increase its power to shut down the HPTA.
Progesterone is synthesised in response to estrogen, so controlling estrogen with an AI will help control progesterone and because of the way prolactin is regulated, thats as well.