In 2003, a large randomised trial to test the effectiveness of a Mediterranean diet (MeDiet) on the primary prevention of cardiovascular disease (CVD) in subjects at high risk of CVD, commenced. 

The name PREDIMED in Spanish comes from: PREvencion con DIeta MEDiterranea. The PREDIMED study was a long-term study undertaken by 16 research groups in seven communities across Spain from 2003 to 2011. The results of the study showed that eating a Mediterranean diet, supplemented with a 30g handful of nuts a day improved heart disease, metabolic syndrome, diabetes, weight and brain function.

To date, the PREDIMED study group has published in excess of 200 papers. 

This report is a summary of papers, published up until 2016, related to nut consumption.