I'm not sure if this is different in the US but a nutritionist isn't a protected term. Anyone can call themselves a nutritionist. This isn't to say that what they're saying isn't true but just be slightly wary if someone calls themself that. A dietician on the otherhand, is the legally...
Hmm, it's between hair or teeth. Maybe teeth as I could get fake teeth put in or something(not dentures). A friend of mine had most of her teeth removed due to an accident and fake teeth put in and you can't really tell.