How to convince my sister a vitamin could help my niece?

NatureRocks Asked: How to convince my sister a vitamin could help my niece?My 15 year old niece is suffering with depression.Today she told her counsellor she is suicidal.She is on antidepressants, but it's only been a couple of weeks and they haven't reached their maximum benefit yet.She is insulin resistant and has thyroid and heart issues as well.I personally suffer from suicidal depression (as well as poly cystic ovary syndrome and the gammut of problems that brings on) as well, however I can usually keep it under control.I have been taking a supplement called inositol for just

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