What is how did dr. john christopher die?

As an AI language model, I have no access to recent developments and news, but I can provide information about the death of Dr. John Christopher which occurred in 1983.

Dr. John Christopher, also known as John R. K. Christopher, was a prominent American herbalist and alternative medicine practitioner who founded The School of Natural Healing in 1953. He died on February 6, 1983, in Provo, Utah, at the age of 80 due to heart failure. His teachings and writings have influenced many alternative medicine practitioners and enthusiasts around the world, and his legacy lives on through The School of Natural Healing, which continues to offer courses and information on herbal medicine and natural healing.