"I'm concerned about liability issues" - what kind of liability are you asking about: moral, or legal?
IMO, morally you should give the best advice you can (or, failing that, none): which will sometimes be 'see a doctor', and sometimes something else.
Given the question it would be a bit of a joke to be asking the community for legal advice, wouldn't it.
More recently, What foods do you consume after biking to retain energy? seemed to me too close to being a question which wanted a serious medical answer.