In December 2017 researchers from the USA and Spain published the results of their study to assess the association between potato consumption, blood pressure changes, and the risk of hypertension. Two Spanish populations were involved in the study; the first involved adults aged 55-80 years who were followed for a 4-year period, and the second a group of university graduates and educated adults, average age 43 years (men) and 35 years (women) who were followed for approximately 7 years. In the first group, the total potato intake was on average 82 g/day whilst in the second group, the total potato consumption was on average 53 g/day. Results showed that potato consumption did not appear to be associated with either the changes in blood pressure among older adults in Spain or with the risk of hypertension among Spanish adults.
Hu EA et al. Potato Consumption Does Not Increase Blood Pressure or Incident Hypertension in 2 Cohorts of Spanish Adults. J Nutr. 2017 Dec;147(12):2272-2281.