The King LeBron James sudden hair growth wasnt the only comeback last Season

For a while it was thought that Lebron James got a hair transplant. Before and after pictures from the summer of 2014 show how his hairline suddenly reemerged! But just a week or so later his hairline was back to how it used to be and he was balding again.
There was also an apparent hoax where he allegedly signed an 85 million+ dollar deal with Hair Club For Men to be their new spokesperson. It's unknown if he just used some spray on hair, a toupee / wig, or something else. Either way, there's no way that Lebron James got a hair transplant. Your hairline doesn't become fully restored and then a week later revert back.What did LeBron use ???