The body is an organized fermentation. This means that our intracellular fluid maintains homeostasis (balance) on 4 levels for optimal health: proper pH (7.4), detoxification (absence of toxic waste materials within and without the cells), nutrition (proper nutrients in abundance and absence of synthetic products, sweeteners, dyes, flavor etc) and a significant bio-electromagnetic charge within the body in order to keep the natural fermentation healthy and in check. The moment any of these 4 factors becomes imbalanced, the natural ferment within the body becomes disturbed and becomes a breeding ground for disease.
For example: a man's pH level becomes imbalanced due to his acidic diet. Coffee, alcohol, meat, grains, etc. His digestion becomes disturbed from the pH level in his body due to his diet. The natural ferment within the gastrointestinal tract becomes disturbed. The cells no longer function properly, and toxicity starts building up within the cell structures. As toxins build up, there is no room for proper nutrients to nourish the cells. The microzyma (natural fermenters found in the blood) actually pleomorph (change shape) from their originally healthy form into a bacterial/yeast/fungus or mold shape to eat away the toxicity building up in the gastrointestinal tract. It is when these microzyma pleomorph into the bacteria or mold that the natural ferment that they existed in becomes disturbed. The gastrointestinal tract is now exhibiting symptoms; gas, bloating, acid reflux, pain, constipation, diarrhea, rashes, ulcers, etc. the man gets diagnosed with leaky gut syndrome, dyspepsia, gastritis, inflammatory bowel disease, or any other disease that could be "diagnosed" in order to indicate that the environment is "diseased ". The pharmaceutical industry prescribes expensive drugs, $80 to $500+ dollars a pill to alleviate the symptoms. The rashes go away, the ulcers subside, the acid reflux ceases to be but the pH is still out of balance and this man's doctors expensive pills won't balance his pH levels. He is paying an outrageous amount to suppress his illness.
Diet change is absolutely needed at this point, detoxification is a must, and the repletion of nutrients is essential for the cells to evacuate the toxicity and morbidity that is feeding the bacteria in order for them to thrive. Once the terrain is balanced the bacteria can no longer thrive there, and thus evacuate the body via the acute healing crisis. The acute healing crisis is the body's natural healing mechanism to dump toxic, morbid, or mucoid materials from the body in order to reestablish balance to the intracellular fluid.
It's not just physical terrain, internal AND external that causes the ferment to go bad, but also negative mental and emotional states or impressions upon the body that causes the ferment to go bad. Mental and emotional stimulus gets directed through the body via electrical impulses from our brain and nervous system. These impressions (positive and negative) directly effect the bio-electromagnetic field in our body which again directly effects the electromagnetic charge on the surface of each red blood cell, the cardiac cells and muscle fibers, the nervous system directly, and other parts of our body the brain and nervous system communicate to via electrical impulses.
All diseases run in this model. Be it diagnosed in the nervous system, the lungs, the kidneys, the blood, the lymph, the liver, the bones, etc. If the 4 factors are out of balance, the person is not getting enough oxygen, and or negative mental and emotional impressions are affecting the bio-electromagnetic communication from the nervous system to the rest of the body, then the biological terrain within the body becomes conducive to disease states.