From the October 1 1928 Toronto Daily Star:
Doctors say it takes 100% bran to relieve constipation! 93% or 97% is not sufficient!
Two Kellogg brothers, John Harvey and Will Keith, invented the process of making flaked cereal at the Battle Creek Sanitarium, a holistic treatment centre that promoted vegetarianism, nutrition, exercise, hydrotherapy, the use of enemas, and abstinence from alcohol, tobacco, and all forms of sexual activity. (John’s Wikipedia entry helpfully points out that “Kellogg’s views on sexuality and masturbation are now considered extreme.”)
W. K. started the Kellogg company after a sanitarium guest, C. W. Post, took notes on how the Kelloggs made their cereal and then started his own cereal company. Apparently, “this upset Will to the extent that he left the sanitarium to found his own company.” I can’t say as I blame him! The Kellogg brothers may have led austere lives by modern standards, but I guess it paid off: they both lived for 91 years. And you can still buy All-Bran in your grocery store.