It's never healthy. Your body is suffering where you can't see the wounds. There are good people out there (therapists) that have the ability and compassion to deal with this behavior.
It's always easier to tell that to someone as opposed to taking your own advice. I'm "healthy" too and only purge after dinner but the only reason it's only after dinner is because I'm in Iraq. I was home for two weeks just recently for leave and I purged much more than just dinner. I need help, I know this but the one thing I used to maintain control over everything in life from a painful past to just trying to get control over life well, I can assure you, you need help. If there is anything I can do for you, please e-mail me kellieanna@gmail.com. There are many webistes out there on eating disorders but I would encourage you to stay away from those because sometimes it just encourages the behavior even more. Take care.

~Sailaway