But the most similar in its properties to boldenone, as oddly enough, turned out to nandrolone. Despite the dissimilarity of the structure of the molecules of the two drugs, and equipoise, nandrolone, and have approximately the same propensity for aromatization (though, of course, unlike that of nandrolone to estradiol conversion takes place without the participation of the aromatase enzyme). Moreover, the androgen receptor stabilization time of these drugs is approximately the same. Nandrolone and equipoise many experts recommend as interchangeable, and believe not entirely appropriate to their one-time use. In my opinion, this is not entirely justified, and that's why.
Stephan Bonnar and Josh Barnett , mixed martial arts (MMA) fighters from the UFC and PRIDE Fighting Championships , have also tested positive for the banned substance.  After the World Extreme Cagefighting show on January 20, 2006 Muay Thai turned MMA fighter Kit Cope also tested positive for boldenone.  Following the Strikeforce card on June 22, 2007 former PRIDE and UFC fighter Phil Baroni tested positive for boldenone, as well as stanozolol .  At a K-1 WGP event in Las Vegas on August 17, 2007 two fighters, Rickard Nordstrand and Zabit Samedov , both tested positive for boldenone.  Alexandre Franca Nogueira tested positive for boldenone in July 2008.