My 17 y.o. otherwise healthy daughter has periodic (3-5/day) episodes of feeling faint and light headed. We originally thought it and is a very healthy eater. Last spring we saw an ENT and she was diagnosed w/vertigo which seemed to resolve after a few weeks w/out intervention. She does not take any medications.
Hello, Now that vertigo has subsided, she should continue vestibular adaptation exercises to prevent relapse of similar symptoms in the future.  Hope I have answered your query. Let me know if I can assist you further. Take care Chat Doctor.