Books & Guides: Mold, Lyme, Long COVID & More

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Books & Guides

Explore our educational books and guides about mold illness, immune health, cellular energy, and the connections among complex chronic conditions.

Featured Flagship Book

Coming Soon — Kindle Edition

Is It Mold, Lyme, Parasites, or Long COVID?

Making Sense of Overlapping Symptoms and Finding Your Next Step

By Dr. Gail Clayton, DCN, CNS, MS, RPh, LDN, and Dr. Margaret Christensen, MD

When symptoms overlap, finding answers can feel like solving a medical mystery.

Fatigue, brain fog, digestive problems, inflammation, and unusual reactions may occur in several different conditions. Is it mold exposure? Lyme disease? Parasites? Long COVID? Or more than one contributing factor?

In this accessible guide, Dr. Gail Clayton and Dr. Margaret Christensen explore how different health challenges can affect interconnected body systems and offer readers a clearer way to think through their symptoms, ask better questions, and consider their next steps.

The goal isn't to give everyone the same answer. It's to help readers understand why their health picture may be more complicated than a single diagnosis.

Available on Amazon Soon

The Kindle edition is being prepared for Amazon. Check back soon.

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New Here? Start With This Free Guide

Free Ebook

Why Don't I Feel Like Myself Anymore?

A Woman's Guide to Hormones, Gut Health, Histamine, Sleep, Energy & Metabolism

If you're new to this work and trying to make sense of symptoms that don't fit one simple explanation, this free ebook is the best place to begin.

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Not Sure Where to Start?

Step 1

New to this work?

Start with the free ebook, Why Don't I Feel Like Myself Anymore?, a gentle introduction.

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Step 2

Want a deeper dive?

Explore the Kindle guides on mast cells, cellular energy, and TGF-beta.

See the Kindle Guides

Step 3

Need more support?

Visit our courses or join the Mentored Healing waitlist.

Questions after COVID? See our COVID Fallout resources.

Explore the Kindle Ebook Collection

Short, focused guides for a deeper look at specific topics.

Kindle ebook

Mold Illness: Mitochondria in the Storm

How mold exposure and mycotoxins may disrupt cellular energy, and why that can contribute to persistent fatigue.

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Kindle ebook

Unmasking Mast Cells

Why some people react to foods, fragrances, and even supplements, and how mast cells and histamine may connect to mold illness.

Explore This Book

Kindle ebook

Understanding TGF-Beta in Mold Illness

For readers with an elevated TGF-beta 1 result, and the practitioners who work with them: what this immune marker means and why it shouldn't be read in isolation.

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COVID Fallout Resources

Guides for readers with questions about the lingering effects that may follow COVID-19. For articles and more, visit our COVID Fallout Resources page.

Complete E-Guide · $17

Hormonal Havoc: The COVID Fallout and How to Fix It

by Dr. Margaret B. Christensen

Understand the wide-ranging effects that may follow COVID-19, including changes in immune function, energy, hormones, and other body systems. Explore important questions and potential connections discussed in our educational resources.

Get the Complete E-Guide — $17

Free Download

Free COVID Fallout Introductory Guide

New to the topic? Start with this shorter introductory guide from Dr. Margaret Christensen, MD, covering connections among immune health, inflammation, hormones, cellular energy, and symptoms people may experience following COVID-19.

Request it on our COVID Fallout Resources page and we'll email it to you. The complete $17 e-guide is sold separately.

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Keep Exploring in Our Learning Center

Our books are just one way to begin connecting the dots. Visit our Learning Center for approachable articles about mold exposure, immune health, the gut, detoxification, and recovery.

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Ready for More Structured Guidance?

Go Beyond the Books

If you're ready for a deeper understanding, explore our educational courses and Mentored Healing program. Our goal is to help you build knowledge, ask better questions, and navigate your next steps with greater confidence.

Our Educational Courses

Structured learning on mold exposure, immune health, nutrition, and related topics.

Explore Our Courses

Mentored Healing

A guided educational community designed to help members better understand their health challenges and become more confident advocates for their own recovery.

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Meet the Authors

Dr. Margaret Christensen, MD

MD, FACOG, IFMCP, ABOIM, CFMHC

Dr. Christensen is a physician, functional and integrative medicine practitioner, and women's health expert. A longtime Institute for Functional Medicine faculty member and Certified Functional Medicine Health Coach, she has spent years caring for people with complex chronic illness, including mold and biotoxin-related conditions, and hosted two Toxic Mold Summits featuring expert interviews.

Dr. Gail Clayton

DCN, CNS, MS, RPh, LDN

Dr. Clayton is a former clinical pharmacist of more than 25 years who pursued advanced training in clinical and functional nutrition. She teaches Functional Biochemistry of Nutrition at the University of Bridgeport and is the author of multiple books on Organic Acids interpretation. Her focus is helping people understand why the body is struggling, not just what to take.

More About the Authors →

These books and guides provide general educational information only. They are not a substitute for individualized medical evaluation or treatment. Please consult a qualified healthcare provider about your own situation.