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In a recent paper on cognitive behavioural treatment for insomnia -...

"The truth is rarely pure and never simple"   Oscar Wilde 

Being a doctor, I tend to get occasional health queries from family members.  Recently my brother emailed me saying "I have been taking multivitamin supplements for a while (also fish oil).  Does the (linked) article mean that I am wasting my $$$$. at least on the vitamins?  ...