Don Colbert is an Oral Roberts University Alumnus and author of more than 40 books that together have sold more than one million copies. An ardent promoter of WWJD and such things as the Jesus diet (no joke!), his most famous books are the ”The Bible cure for ...”-series. You can get, for instance, The Bible cure for cancer, or The Bible Cure for Depression and Anxiety (”Ancient Truths, Natural Remedies and the Latest Findings for Your Health Today [With Guidebook]”), The Bible Cure for Weight Loss and Muscle Gain ("Jesus wants YOU to be thin" is in fact the slogan, and – just as you suspected – the diet recommendations are baskets of bread and fish, and watered down wine), The Bible Cure for Allergies, The Bible Cure for ADHD, for PMS & Mood Swings, and so on and so forth.
He has also written ”Toxic Relief: Restore Health and Energy Through Fasting and Detoxification” which will give you an idea about where this is heading. And yes, Colbert’s work is a brilliant combination of fundamentalist religion and the most ridiculous New Age alternative treatments (negative feelings as the main cause of disease, apart from mercury in dental fillings and vaccines and so on for some utter lunacy, visit here.
Extensively used by Televangelists to discuss health and nutrition (Benny Hinn, the Copelands). His claims are generally too loony to be caught by Quackwatch, Orac or the like.
Diagnosis: Complete nutjob (with an admittedly effective marketing idea) and godbotter. Appears to be relatively influential.