Walker wrote six books published from 1937 to 1978. He also invented the Norwalk Hydraulic Press Juicer, an appliance still produced and sold today. Many different sources claimed the juicing regimen kept Walker alive and in good health up to the age of 119 years of age. Actually, Mr. Walker died at 99 years of age.
In 1930, Mr. Walker, in association with a medical doctor, opened a juice bar featuring home delivery. The two businessmen developed formulas of juice mixtures targeted for specific health problems. It was at this time that he invented the Hydraulic Juicer. The juice bar attracted the attention of the health department who closed it down because the juice was unpasteurized. Two more factories were set up in different states with the same results. Following these business failures, Walker first opened a health ranch in Arizona and then sold it and pursued fulltime writing.
Mr. Walker believed a diet of raw and fresh vegetables, fruits, nuts and seed was the basis of a healthy diet. He believed cooked food was dead and progressively deteriorated the health, energy and vitality of the body.
Critics claim the advantages of a juicing diet are non-existent or unproven.