Attitudes such as this one from the Navy Secretary make one wonder if the military can ever get back on track. An environment in which patriotic US citizens with strong values won't serve is not a plan for success.
Just for information, a list of the medical conditions that would disqualify a person from joining the Navy.
http://navy.army.com/info/join/medical
If young men and women that have attention deficit were not allowed to serve if they had to take retillin then transsexuals who take hormones should not be allowed to serve for the same reason.