i thougt that test DID shut your natural test down. and this site is saying that deca is more mild: (
http://anabolicreview.com/drugprofiles.php?steroid=82)
Those who take Testosterone enanthate should consider the intake of HCG every 6-8 weeks. An injection of 5000 I.U. every fifth day over a period of 10 days (a total of 3 injections) helps to reduce this problem. At the end of the testosterone treatment the administration of HCG, Clomid, Nolvadex and Clenbuterol is now quite common. To some extent the use of these compounds helps absorb the catabolic phase and helps elevate the endogenic testosterone level. By this method the strength and mass loss which occur in any event can be reduced. Those who go off Testosterone enanthate cold turkey after several weeks of use will wonder how rapidly their body weights and former voluminous muscles will decrease. Even a slow tapering-off phase, that is reducing the dosage step by step, will not prevent a noticeable reduction. The only options available to the athlete consist of taking testosterone-stimulating compounds (HCG, Clomid, Cyclofenil), anti-catabolic substances (Clenbuterol, Ephedrine), or the very expensive growth hormones, or of
switching to milder steroids (Deca-Durabolin, Winstrol, Primobolan). Most can get massive and strong with Testosterone enanthate. However,
only very few are able to retain their size after discontinuing the compound. This is also one of the reasons why really good body builders, power lifters, weight lighters, and others take the "stuff " all year long.