Less of a challenge, more of a statement of facts would suffice I think.
Your credentialed health teacher was trained by? Probably mainstream; which includes The American Dietetic Association who know next to nothing about fasting and its benefits.
Ask any Naturopathic Doctor or Natural Hygienic Doctor what they think about fasting? many of whom have had extensive experience with fasting in recovering from disease and achieving "wellness"
Here are just some quotes from Qualified Medical Practitioners (MD's)
Evart Loomis M.D. -"Fasting is the world's most ancient and natural healing mechanism. Fasting triggers a truly wondrous cleansing process that reaches right down to each and every cell and tissue in the body. Within 24 hours of curtailing food intake, enzymes stop entering the stomach and travel instead into the intestines and into the bloodstream, where they circulate and gobble up all sorts of waste matter, including dead and damaged cells, unwelcome microbes, metabolic wastes, and pollutants. All organs and glands get a much-needed and well-deserved rest, during which their tissues are purified and rejuvenated and their functions balanced and regulated. The entire alimentary canal is swept clean. By rebuilding immunity, health is naturally restored and disease disappears. If health and immunity are thereafter conscientiously maintained, the individual is no longer vulnerable to disease and dieting become unnecessary. Surely one of the most overlooked and yet most valuable modes of healing that will be rediscovered in the future of the new medicine is the fast. This is because of the increasing interest in looking to oneself for healing powers. For the fast is an inward process and cannot be entered upon only from an outer approach with any expectation of a lasting benefit. The person must invariably be involved with the overall results. This therapeutic encounter is in direct contrast to the usual non-involvement in the physician-directed, disease-oriented medical practice of today."
These are a few examples only.
There are some contra-indications to fasting, but they are minimal.
If you do some of your own research cowgirlbebop you will discover for yourself a whole new way of life that puts health first and biased credentials second.
The evidence of this forum can probably convince you as to the truth that lays within it. You will receive only benefit therefrom.
PS. Fasting saved my life. Of that there is no doubt whatsoever.