Cellucor P6 Xtreme Reviews Brian E. June 4, 2015 Muscle Growth Reviews, Testosterone Supplements Reviews Word on the street is Cellucor will be releasing a third supplement to their Xtreme Line: P6 Xtreme. Cellucor P6 Xtreme will supposedly improve strength, lean muscle mass accrual, and also support healthy testosterone production. Until an official ingredient profile has been released, we won’t be able to speculate on what micronutrients and matrices will be included in this testosterone booster. However, we’re absolutely stoked for Cellucor P6 Xtreme’s release, and we’ll update this review as soon as we get more information. Leave a Reply Cancel Reply Your email address will not be published.CommentName* Email* Website To leave a comment please enable JavaScript in your browser settings!