Not really that's mostly gym science steroids have completely different chemical structures than test. Your body doesn't make nandrolone deconated so it has nothing to suppress. I've taken just about every compound out there and the only time my free test levels took a beating was from sustanon, that suppressed my testicular axis. It could be because I only run a compound for 6 weeks and switch maybe that's just not long enough to suppress your testicular axis. I can tell you one thing for certain if your under 35, mg for mg test will give ypu more sides than almost any steroids exceptions being halotestin and maybe tren. History lesson for you young guys when these board first became hot dealers pretended to be pros. They would lie about what pros take in order to get get kids to believe the cheapest hormone, "technically test isn't a steroid" was the best. They even had a saying test is best but in reality they were just making a fortune selling to keyboard warriors. They loved me on getbig until I exposed gh 15 wasn't a pro. He made a claim that there's certain gh you can buy that's infused with igf1. I said this lie is dangerous gotta blow up his spot gh converts to igf1 by stimulating the liver which mimics the body's natural pathway. If you mixed igf1 with a high dose of gh you can end up with seizures,immediate and dire blood sugar problems and worst of all the mega dose of igf1 goes fron growing muscles to growing tumors, like growing a tumor within days. Scary shit that's why i say if your going to give this type of advice you should give your real name so people makes sure your legit