Can Intermittent Fasting Heal Chronic Complex Illness and the Cell Danger Response?

Fasting reached the public as a weight loss strategy, and as a weight loss strategy it has now been shown to add nothing beyond the calorie deficit inside it. The trials that tested it properly found that compressing the eating window added almost nothing to the weight loss equation, and raised a serious question about how much of what weight was lost was muscle rather than fat. Both findings are below, with the numbers.

The more interesting question, and the one I have been examining as a physician treating chronic complex illness, is whether intermittent fasting or time restricted eating can earn a place in a comprehensive treatment plan for the patients I see: mold illness, mast cell activation syndrome (MCAS), dysautonomia, post-viral illness, autoimmunity, chronic fatigue syndrome, and the multi-system, multi-symptom presentations that defy conventional and even functional medicine frameworks; most of them falling under the collective umbrella of the mitochondrial cell danger response. In my experience, for some of those patients a compressed eating window is one of the most useful things they can do. For others the same protocol may backfire. The difference between those 2 outcomes has nothing to do with the length of the eating/fasting window.

Part One of this series covered how intermittent fasting and time restricted eating work, along with the associated health benefits. This article is the practical side: how to structure a fast, who should not attempt one, and where a fast belongs in a treatment plan for chronic complex illness.

What follows in the article below covers:

• What the enzymes mTOR and AMPK are each doing at the cellular level, and why healing is supported by alternation between them.

• Why the cell danger response decides whether a fast repairs a patient or drains them.

• The 14 situations where I will not recommend a fast, and the 9 where I will.

• What has now been disproven about fasting for weight loss, and what it costs the people still trying it.

• The first randomized fasting trial in long COVID: real symptom relief, and a flare in 58% of the same patients.

• Why women, and perimenopausal women especially, should not fast the way the research was designed.

• A practical guide to time restricted and intermittent fasting schedules, including all the different schedules and how to structure them.

A fast is a demand for energy before it is ever a source of more energy. A body that cannot meet the demand may deteriorate further, and it can remain there for months. Knowing which body circumstances you are working with is the essence of a clinical workup and the individual precision needed, case by case, and almost everybody finds out by getting it wrong first.