A researcher’s father notices that after eating a quarter pound of Celery everyday for one week his blood pressure dropped from 158 over 96 to a normal reading of 118 over 82

According to this website
http://ma.essortment.com/celerynutritio_rzij.htm

Celery has been used in Asia as a treatment for high blood pressure for centuries. Once put to the test by an assistant professor at the University of Chicago, the remedy was proven true. By injectiong research animals with a small amount of 3-n butyl phthalide, which is a chemical found in celery, he dropped the blood pressure of the test subjects by 12%to 14%. Phthalide relaxes the arteries that regulate blood pressure. This allows the vessels to dilate. Phthalide also lowers the level of stress hormones called catacholamines.This helps fight high blood pressure that is stress induced constricting blood vessels and raising blood pressure.