The dictum of Hippocrates“Let thy food be thy medicine and medicine be thy food”is potentially both more accurate and more dangerous than ever before.This dictum can only be realistically applied if all foods are known to be safe.Nowadays foods are being produced,which are processed in a variety of ways with ingredients sourced from many different countries and processed in a variety of ways.This processing may include the addition of supplements which are intended to improve health and of adulterants which are potentially harmful.Additionally,foods may be contaminated with pesticides and other materials encountered during production and processing.Thus there is a need to identify“unsafe”foods.The question may be better put as:Which foods are safe?
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