Conor McGregor is alleged to have continued using banned drugs, including anabolic steroids and human growth hormone, long after his shattered leg had healed, despite a UC Davis professor warning such substances can raise the risk of serious heart conditions and cancer.
With the UFC star set to make his return to the octagon in Las Vegas this Saturday, two sources with knowledge of the matter claim the 37-year-old kept up the illicit regimen simply because he liked the energy boost it provided.
