Skip to content
Dr. Isaac Jennings – Publications
  • Jennings, Issac. (1852). The Philosophy of Human Life. Cleveland, Ohio: Jewett, Proctor & Worthington. Internet Archive –
    • Jennings starts by discussing the basis of the old systems of medicine.  He then writes chapters on human physiology, general and special pathology, and reasons for rejecting heteropathy (method of treating disease with remedies) and adopting orthopathy (An alternative-medicine philosophy advocating a vegetarian raw-food diet with periods of intermittent fasting) over 284 pages.
The Philosophy of Human Life was published in 1852.
  • Jennings, Issac. (1960). “What Is Disease.Eternal Health Truths of a Century Ago., no. June 1960, pp. 16-24, out of print/Edited by Christopher Gian-Cursio. Accessed 8 Feb. 2024.
    • A copy of this out-of-print book was donated to the Internet Archive. Check to see if this has been added to the Internet Archive,
    • “What is a disease?” asked Jennings. It was and is the question of the day. Jennings believed that disease is the abatement of health–nothing more, nothing less.
    • With good health, the organs perform their parts, untiring with undeviating steadiness, as the planets move in their orbits.
    • The first step on the descending scale of health is the reduction of power; second, functional derangement; third, structural derangement, or organic disease. As the force abates, action, enfeebles, and vacillates, the composition or decomposing functions of organs begin to fail to a greater or lesser degree.
    • No artificial or unnatural means can make anyone feel better than he or she is in the constant habit of feeling. People of sound constitution and figure of health who live on a simple healthy diet never perceive any good effect from the use of stimulants (e.g., drugs, alcohol). It is actually the reverse.
    • Dr. Jennings discusses the foundation of disease, or predisposition, as it was called. This condition has been produced by a long, persistent course of violation of the laws of life. He goes on to discuss that this predisposition or depressed state of the body differs greatly in each individual. 
Welcome to the new home of the National Health Association!
If you are an existing member, you will need to reset your password in order to log in and take advantage of all the great benefits being a member provides—which now includes the ability to update your own contact information (address, phone number, email, upload a picture and much more). Please start by clicking the Register/Log In button and follow the instructions on that page. Once your password is reset, you will use your email address as your username. You no longer have or need a Member Number. Please contact us if you have questions—and thanks for your support!