The article talks about how eating walnuts, almonds and hazelnuts as part of a daily diet was scientifically shown to reduce heart problems in a large health study done in Spain. He says in his article " Patients who ate a "Mediterranean" diet rich in nuts or extra virgin olive oil as well vegetables and wine had 30% fewer heart attacks, strokes, or deaths from cardiovascular disease than those that ate a diet that simply lowered their intake of dietary fat".

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http://www.forbes.com/sites/matthewherper/2013/02/25/what-to-eat-a-study-proves-a-diet-rich-in-olive-oil-or-nuts-can-prevent-heart-attacks-and-strokes/