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. 
Note that in androgen-responsive target tissues such as the skin, scalp, and prostate, the relative androgenicity of nandrolone is reduced by its reduction to dihydronandrolone (DHN). 438 439 The 5-alpha reductase enzyme is responsible for this metabolism of nandrolone. The concurrent use of a 5-alpha reductase inhibitor such as finasteride or dutasteride will interfere with site-specific reduction of nandrolone action, considerably increasing the tendency of nandrolone to produce androgenic side effects. Reductase inhibitors should be avoided with nandrolone if low androgenicity is desired.
Laurabolin is an injectable steroid used in veterinary medicine. It is usually intended for canine use. Bodybuilders use Laurabolin since it has similarities to the other nandrolones Deca-Durabolin, Durabolin, and Anadur. The main difference between these steroids is in their durations of effect. Laurabolin is a long-term anabolic that stays active for almost four weeks. Theoretically one single injection per month would be sufficient but no athlete observes this, since such a low dosage would not have performance-enhancing characteristics. Bodybuilders inject Laurabolin at least once a week and report good results when sufficient dosages are injected. The generally observed dosage is 200-400 mg/week. The great disadvantage of Laurabolin is that this compound is only available in a strength of 50 mg/ml so that every week a total amount of 4-8 ml must be injected. Most athletes with whom we spoke usually inject 2 ml of solution twice weekly. The achieved results are similar to those found with Deca-Durabohn (see also Deca-Durabolin); the same is also true for potential side effects. Those who can get an original Deca should give Deca the preference over Laurabohn. The advantage of Laurabolin consists in its relatively low price and the fact that-unlike Deca-here are not yet any fakes. Laurabolin is available in 5, 10, and 50 ml glass vials, depending on the country of origin. The 50 ml glass vial costs between $200 and $250 on the black market. This corresponds to a price of $4 - 5 per 50 mg so that Laurabolin, in any case, is considerably cheaper tharibeca. Original Laurabolin by Intervet Company of Mexico is available in a brown glass vial with 10 ml or 50 ml solution. The label has square corners and the expiration date and batch number are clearly visible and imprinted later. Since the substance included in Laurabolin is very inexpensive it is often used when manufacturing injectable fakes.