Yes, absolutely. Take a peek at these. Steroids aid the body's recovery from damage, such as muscular tears caused by elite force training. They also help the body build muscle mass. According to a former teammate of Morgan's, between 2006 and 2011 he saw a change in his friend's physique. "Morgan went from being a skinny kid to looking like a bodybuilder", the former teammate said. "I think some of it is due to [the steroid] Deca-Durabolin", he continued. "It produces a lot of growth hormone which helps with recovery". Another former teammate, Jeff Holland, told NBC News that he believed many of his fellow SEALs took performance-enhancing drugs. According to him: "There's definitely a culture within the community where people are going beyond the limits and people are following them down that path". In an interview with Men's Health, Commander Tom Huckaby, who retired from the Navy last year after 24 years of service, said that he believes up to 80 percent of all SEAL teams include at least one active drug user. He added that he thinks this proportion is even higher among junior members of the teams. Navy regulations prohibit personnel from taking steroids while serving on board any vessel.