Discover the simplest and most powerful natural lifestyle secret that has improved the lives of thousands!

Prof. Arnold Ehret’s Mucusless Diet Healing System: Annotated, Revised, and Edited by Prof. Spirais a complete course for everyone who desires to learn how to control their health. You will learn how to:

  • Overcome debilitating health issues naturally,
  • Identify which foods are mucus-forming,
  • Get rid of nasal congestion and terrible coughing,
  • Eliminate unnecessary weight,
  • Heal yourself of numerous painful ailments,
  • Transition safely and permanently toward a mucus-free diet,
  • Combine the mucusless diet with intermittent fasting,
  • Feel better than you thought possible,
  • And much more!
Improve your life!

The Mucusless Diet consists of all kinds of raw and cooked fruits, starchless vegetables, and cooked or raw, mostly green-leaf vegetables. The Mucusless Diet Healing System is a combination of individually advised long- and short-term fasts, menus that progressively change to non-mucus-forming raw foods, natural exercises, and periodic colon irrigation. This is the first critical edition of Ehret’s famous diet.

Title Page
Biographical Sketch of Prof. Arnold Ehret by Prof. Spira 1
ntroduction to the Annotated Version by Prof. Spira 5
Foreword by Fred Hirsch 7
 Lesson I.       General Introductory Principles  9
 Lesson II.      Latent, Acute, and Chronic Diseases— No Longer a Mystery  17
 Lesson III.     Why the Diagnosis  21
 Lesson IV.     Diagnosis—Part 2  27
 Lesson IVa.   The Magic Mirror  35
 Lesson V.      The Formula of Life  45
Lesson VI.     The New Physiology  53
 Lesson VII.    The New Physiology—Part 2  59
 Lesson VIII. The New Physiology—Part 3  65
 Lesson IX.     The New Physiology—Part 4  71
 Lesson X.      Critique of All Other Healing Systems, and Unbiased, Unprejudiced Reviews  75
 Lesson XI.     Confusion in Dietetics  79
 Lesson XII.   Confusion in Dietetics—Part 2  81
 Lesson XIII. Confusion in Dietetics—Part 3 91
 Lesson XIV. Ragnar Berg’s Table (Revisited)  95
 Prof. Spira’s List of Acid-Forming and Acid-Binding (Mucusless) Foods  99
 Lesson XV.   Transition Diet  111
 Lesson XVI. Transition Diet—Part 2  121
 Lesson XVII. Transition Diet—Part 3 (Vegetarian Recipes Revisited)  129
 Lesson XVIII. Fasting  143
 Lesson XIX. Fasting—Part 2  147
 Lesson XX.   Fasting—Part 3  153
Lesson XXI. Fasting—Part 4  159
Lesson XXII. Destructive Diet of Civilization and the Mucusless Diet  165
Lesson XXIII. Sex  173
Lesson XXIV. Sex—Part 2  179
Lesson XXV. The Enforcement of Elimination by Physical Adjustments  187
A Message to Ehretists  195
Index  199
About Prof. Spira  204
List of Other Publications  205


We read in the Bible, Genesis 1:29: “I have given you every herb bearing seed which is upon the earth—and every tree in which is the fruit yielding seed; to you it shall be for meat.” You will note that the word “meat” is used to denote human’s “food,” not the carcass of dead animals! Arnold Ehret was a student and follower of Nature’s laws—in communion with GOD! Ehret’s teachings have their foundation in TRUTH—but until they are “demonstrated,” the average individual cannot grasp their significance and consequently—not until then—do they prove acceptable to the great majority!

Arnold Ehret described and denounced superstition and ignorance, but like similar teachings of great men, his teachings have been grossly misunderstood by the average individual and unjustly criticized by many health teachers. It has now been well over 70 years that his voice was first heard vainly sounding a note of warning, desperately hoping to dispel the colossal ignorance of the average uninformed individual concerning Natural laws! His teachings have opened many new avenues of healing, and his wonderful philosophy and knowledge offered to those willing to accept bring thousands of new converts each year, from every part of the globe!

Ehret taught that the mind governs all organic action of the physical body instinctively and we therefore find humankind gradually evolving from the primitive stage to a higher intellectual plane. The physical and mental welfare of millions of individuals living today are desperately searching for a truthful presentation of this knowledge found only in Prof. Arnold Ehret’s message and it is therefore eagerly awaited by an expectant world! Is it asking too much that you lay aside preconceived ideas, opinions, or prejudices and read the Ehret articles with an open mind? Hopefully the truth will eventually dawn upon you, possibly months after reading—for some portion may have indelibly stamped an imprint on your mind—and intuitively proven its correctness!

There is no “mystery” connected with Ehret’s “Mucusless Diet” theory—though it differs almost entirely from other “healing systems,” especially his lucid explanations. Ehret practiced no deception; his statements are easily understood because of their outstanding “simplicity” of expression. He continually informs the student, “Whatsoever is not simple—easily understood, is ‘false’ and therefore not the truth!”

Fundamentally, Ehret’s teachings of his philosophy are basically the love of NATURE itself—love of all outdoors! The love of flowers and trees, the love of all of the birds and animals! Ehret loved the sunshine and the rain, the cold and the warmth, the bright days and the cloudy days. And he sincerely taught that we must feel justly proud of our own physical bodies—CLEAN both internally and externally!

Our “love” of birds and four-legged animals instinctively warns that we must not harm these fellow creatures—and never kill them for our food! Mother Nature has abundantly supplied us with quantities of delicious, nutritious fruits and vegetables on which we thrive! With a clean bloodstream coursing through our bodies, any thought of cannibalism becomes obnoxious.

Arnold Ehret taught tolerance! Respect for the rights of others and acceptance of their rights to their own beliefs! Never attempt to force others to accept your beliefs, but rather through precept and example create a desire on the part of those interested in health to seek this great truth of their own free will! Through your tolerance of “ignorance,” you will have proven your superiority, and eventually “nonbelievers” will see the bright glow of TRUTH!

-Fred S. Hirsch, DNS (Ehret Literature)

General Introductory Principles
Lesson I

Every disease, no matter what name it is known by medical science, is


It is a clogging up of the entire pipe system of the human body.[i] Any special symptom is therefore merely an extraordinary local constipation by more accumulated mucus at this particular place.[ii] Special accumulation points are the tongue, the stomach, and particularly the entire digestive tract. This last is the real and deeper cause of bowel constipation. The average person has as much as 10 pounds of uneliminated feces in the bowels, continually poisoning the bloodstream in the entire system.[iii] Think of it!

Every sick person has a more or less mucus-clogged system, such mucus being derived from undigested, uneliminated, and unnatural food substances accumulated from childhood on. Details regarding this fact may be learned by reading my Rational Fasting and Regeneration Diet.

My “Mucus Theory” and Mucusless Diet Healing System stand unshaken; it has proven the most successful “Compensation Action” so-called cure against every kind of disease.[iv] By its systematic application, thousands of declared-incurable patients could be saved.

The mucusless diet consists of all kinds of raw and cooked fruits, starchless vegetables, and cooked or raw mostly green-leaf vegetables.[v] The Mucusless Diet Healing System is a combination of individually advised, long or short fasts with progressively changing menus of non-Mucus-Forming Foods. This diet alone can heal every case of “disease” without fasting, although such a cure requires longer time.[vi] The system itself will be expounded in later lessons.

However, to learn how to apply this system and understand how and why it works, it is necessary to free your mind of medical errors, partly taken by naturopathy.[vii] In other words, I must teach you a new physiology, free from medical errors; a new method of diagnosis; a correction of the fundamental errors of metabolism, high protein foods, blood circulation, blood composition, and last but not least, you must be taught:

What Vitality Really Is



[i] Many people assume that Ehret is referring only to bowel constipation. However, his use of the word is much broader in scope, referring to constitutional encumbrances on the cellular level that have been obstructing one’s organism since birth. Although Ehret does assert that the foundation of cellular constipation is bowel constipation, which is the definite result of eating pus- and mucus-forming foods, Ehret’s concept of the term extends beyond the bowel.

[ii] The word “mucus” is from the Latin mucus which means “slime, mold, snot, etc.” Mucus refers to a thick, viscous, slippery discharge that is comprised of dead cells, mucin, inorganic salts, water, and exfoliated cells. It also refers to the slimy, sticky, viscous substance left behind by mucus-forming foods in the body after ingestion.

[iii] This fact may be hard to believe at first. Later in this book, Ehret will discuss cases where he helped people eliminate a lot more than 10 pounds of fecal matter from the bowels. Also, since the time of Ehret, other naturopaths have observed and documented the elimination of pounds of mucoid plaque (rubber-like strings of rotting mucus found in the intestines), feces, decades-old feces stones, and other toxemias. To look at some compelling pictorial examples of such waste, see Bernard Jensen’s Tissue Cleansing through Bowel Management. Keep in mind that most of the dietary prescriptions in the book are problematic, and I do not recommend using them. However, the real pictures of the kind of internal waste that humans harbor are profound.

[iv] “Mucusless” refers to foods that are not mucus-forming. Such foods digest without leaving behind a thick, viscous, slimy substance called mucus. These foods include all kinds of fat-free and starchless fruits and vegetables.

[v] The word “fruit” refers to the ripened ovary or ovaries of a seed-bearing plant, together with accessory parts containing the seeds and occurring in a wide variety of forms. Ehret is specifically referring to mucusless fruits: fat-free and starchless fruits that leave behind no mucus residue. An unripe banana is an example of a starchy fruit, while an avocado is a fatty one. “Green leafy vegetables” refers to various mucusless leafy plants or their leaves and stems that may be eaten as vegetables.

[vi] The word “fast” means to abstain from the intake of food and drink for a period of time. It may also refer to various forms of dietary restriction, which include abstaining from solid foods (juice or liquid fasting), mucus-forming foods (mucusless diet), animal products, and so forth. Fasting may also refer more broadly to abstaining from modern conveniences or unnatural additions, for example, a fast from electricity or the use of electronics for a period of time.

“Mucus-forming” refers to foods that create or leave behind uneliminated mucus in the human body. Such foods include meats, dairy, grains, starches, and fats.

Ehret periodically uses the term “disease” to refer to human illness. Yet, Ehret suggests that the word is inherently problematic, hence appearing in quotations. With that said, Ehret does not ever purport to “treat” diseases, but to naturally heal human illness through a change in diet toward mucusless foods and short-term fasting. Since the initial publication of the Mucusless Diet, the use of the word “disease” by non-medical professionals has been vigorously contested. In many countries, people face legal consequences for diagnosing, or claiming to cure, what the medical profession refers to as “disease.”

To gain insight into the meaning of the word disease, we must consider its etymology (historical origins). The term “disease” can be traced back to the early fourteenth century, when it meant “discomfort” or “inconvenience.” It derives from the Old French “desaise” meaning “lack, want; discomfort, distress, trouble, misfortune, or sickness.” Literally ‘des (dis)’ meaning “without, away” and “aise” or ease meaning comfort, pleasure, or well-being. The word was still commonly used in its literal sense until the early part of the seventeenth century, and has been revived in modern usage with the spelling dis-ease.

By the seventeenth century, the word “disease” was also being used to identify specific conditions of the body, or of some body part or organ, in which its functions are disturbed or deranged. Over time the word came to be used to identify a species of disorder or ailment, in which they exhibit special symptoms or affect a specific organ. Customarily the defining words of the “disease” either indicate its symptomatic nature, were derived from the surname of a person who has suffered from it, or the surname of the physician who first diagnosed it. For instance “Bright’s Disease,” the disease Ehret was diagnosed with, and which he cured himself of, was first described in 1827 by the English physician Richard Bright.

Ehret tends to use the term “disease” in its original sense, which is to refer to a distressing or uncomfortable condition of the body. Yet, he identifies the express purpose of this condition to be “an effort of the body to eliminate waste, mucus, and toxemias.” This is a significant definition of disease because it is one of the foundational concepts for the mucusless diet—that we eat for the purpose of cleansing and not to obtain nutritional sustenance. Yet, in subsequent lessons, Ehret does critique the medical notion of diseases, and shows how a mucusless diet expert can interpret and use medical diagnoses to determine what type of transition diet and fasting protocols to suggest to their patients.

[vii] The term naturopathy was coined in 1895 by John Scheel and made famous in the United States by one of Ehret’s students named Benedict Lust, who founded the first school of naturopathy in 1902. Naturopathic medicine favors a holistic and drugless approach to healing and seeks to find the least invasive measures necessary to relieve symptoms and heal human illness. “Natural Hygiene,” or orthopathy, is a healing philosophy derived from naturopathy that advocates plant-based diets and periods of intermittent fasting. Although many prominent naturopaths and natural hygienic practitioners were, and continue to be, greatly influenced by Ehret’s works, their healing practices and philosophies about nutrition usually greatly differ from Ehret’s.

Click Here to Get Your Copy Now!

Download the Top Ten Best Mucus-free Foods

Learn how to Identify which foods decompose into slimy mucus and clog up the body

Your personal rediscovery of your radiant, intended self is amazing! Living examples, that's what people you are like, timeless individuals who live natural truth and telebeam it to others. . .
Cy, Living foods expert, mother, and registered nurse
. . . I feel like this lifestyle is limitless! It has given me results that I could have never dreamed of a year ago. You . . . have really inspired me and given me the knowledge necessary to get to where I am today. I know I have just scratched the surface to this new lifestyle as I am doing research every day and learning many new things every day.
Andy J. Gorman, Certified Wood Technician and owner of Free Flow Creations
You've changed my life my brother. I'm currently going through a fast because I have had a very mucused diet in the past which has brought out my eczema again. Your videos and writings have woken me up from the matrix I was living in with my diet. Even when I went vegan I was still having skin issues, but after seeing what you have to say about mucus, and why you have to decrease it, it all makes sense.
Nicky Castor Bennett, Health-seeker
Thank you for blessing me! Your recipes are incredible and have given me a new purpose. I'm LOVING it! You truly are amazing. You have done nothing but given all you can to help me and I truly appreciate this. Thank you for feeding me.
Samantha Claire, Pianist and Mucusless Diet Practitioner
The book is excellent! I love the fact that you are so detail oriented. With each page I was learning a lot. Professor Spira, you really outdid yourself and deserve a pat on the back!
Keonna Lo, Health Seeker
Professor Ehret planted the seeds and gave us some tools to start out this new era of re-creating our lives, re-educating ourselves, and re-programing our thinking which was so carelessly messed up by the world we live in. And Professor Spira is the person that picked up from where Arnold Ehret left off and has made everything complete...
Georgia Barretto, Brazilian Jazz Musician
I'm definitely impressed. As simple as you kept much of the language in the text, the writings resonate with me on a much deeper level. The reading forced me to reassess my personal perspective on the subject, and served to challenge all that I previously held to be true. I have much (more) work to do! Thanks again!
Danny Michael , Natural Health Consultant & Dietary Scientist
  • How to Break a Long Fast

How to Break a Fast?: Lesson 19 Mucusless Diet

How to Break a Fast "Lesson 19" Mucusless Diet #3 Fasting Video Series Part 6 How to Break a Fast A fast is only as successful as how well it is broken. In this above [...]

  • raw intuition

[VIDEO] Prof. Spira Interviewed by Matt Bennett for Raw Intuition Inside Scoop

Raw Intuition Interview with Prof. Spira A great interview with Prof. Spira on Raw Inspiration Insider Scoop with Matt Bennett. Recorded Summer 2016. Visit Raw Inspiration's Youtube Channel here: The Worldwide Mucusless Movement One [...]

  • how long to fast

How Long Should You Fast? Lesson 19 Mucusless Diet

HOW LONG TO FAST? "Lesson 19" Mucusless Diet #2 Fasting Video Series Part 4 How Long Should You Fast? How long to fast? In this above video, we continue the 2017 discussion on Arnold Ehret's [...]

  • lemonade fasting

Lemonade Fasting on a Mucusless Diet ? “Lesson 19 Pt 1”

INTRODUCTION TO LEMONADE FASTING AND THE MUCUSLESS DIET "Lesson 19" Mucusless Diet #1 Fasting Video Series Part 3 In this above video, I continue my 2017 discussion on Arnold Ehret's methods for fasting. The text [...]

This post is also available in: Español (Spanish)