I have been engrossed in this book (Pantheon Books 2017).
It's a gripping tale of the Kellogg brothers - John Henry (1852-1943), and Will Keith (1860 - 1951).
John Henry was spotted and destined for greatness by Ellen Harmon White ("Prophetess" and founder of the Seventh Day Adventist) and her husband James White. They mentored him and sponsored his education at Bellevue Hospital Medical College. They prepared him to be the Director of their Sanatorium in Battle Creek, MI.
J.H. Kellogg emerged as a masterful surgeon, a brilliant diagnostician, and a powerful advocate of meat free healthy diets.
Brilliant as he was, JHK was an arrogant despot. He eventually wrestled control of the San from the General Conference of the Seventh Day Adventist Church, and it became his fiefdom. He was excommunicated by the SDA's for his pains.
Brilliant as he was as a Surgeon, Diagnostician, and far sighted dietician, JHK also has some quirky and dangerous ideas. He saw indigestion and masturbation as major actors against human health. He and his wife almost certainly did not consummate their marriage, and slept in separate roomsfrom day one of their marriage.
Quite disastrously JHK also became a fervent advocate for the pseudo-science of eugenics.