The GAPS explanation of alopecia areata begins with the hair root and the immune system. Dr. Natasha Campbell-McBride describes substances accumulating around the root, an inflammatory response and hair loss. She places that local process within her wider account of gut health and autoimmunity.[1]
There are several ideas inside that explanation. Separating them makes it easier to understand what the book says, what the FAQ adds and what an observation about your own hair can actually tell you. For the wider approach and recovery discussion, begin with the alopecia and GAPS overview.
The Hair and Its Supply
The alopecia entry describes every hair as growing from a root with its own blood, nerve and lymphatic supply. It then describes hair as a storage site for minerals, trace elements and toxins.[1] These are connected points in the author’s account, but the existence of a blood supply alone does not measure what is stored in a particular person’s hair or scalp.
The distinction between hair and root also matters. The source first describes storage in hair and then discusses accumulation at the root. It does not establish that a painful patch contains a particular metal, or that a hair test can explain every person’s hair loss.
The Author’s Immune Explanation
Dr. Natasha describes the immune system responding to substances at the root with inflammation and autoimmunity. In the wider immune chapter, she explains autoimmunity through contaminated or altered body tissues that the immune system tries to clear. Her position is that the immune system is responding to a problem, rather than acting without a reason.[1][2]
That is why the GAPS approach includes the gut wall, microbial balance, nourishment and environmental exposure in a discussion that might otherwise seem to be only about hair. Her proposed route begins beyond the scalp and ends in the local immune response.[2]
The entry describes damage at the root, but it also describes roots recovering and hair growing again. It does not say that every affected root is permanently destroyed.[1]
Why the Gut Is Central to This Account
The immune chapter describes abnormal gut flora and a damaged gut wall allowing microbial products, incompletely digested food and other substances into the body. The author connects that continuing exposure with immune activation and states her view that autoimmunity begins in the gut.[2]
For alopecia, this provides the rationale for the Nutritional Protocol rather than a separate “hair food” prescription. The autoimmunity guide explains the wider chapter. The food and scalp-care guide covers the resulting recommendations without repeating the whole mechanism.
What Human Microbiome Research Adds
An original 2024 pilot trial investigated an oral probiotic mixture in adults with alopecia areata. It randomized 26 people for 24 weeks. Both groups received corticosteroid injections into the affected areas, with the probiotic or placebo added alongside them.[5]
Several results favored the probiotic group, and the authors considered the pattern clinically encouraging. For example, fewer patches were recorded in 5 of 9 participants in that analysis, compared with 3 of 10 in the placebo group. The small study did not show statistically significant differences between groups for those clinical outcomes. It detected some scalp-microbiota changes but no significant gut-microbiota change.[5]
This is relevant human research into microbial support and hair disease. It studied a particular probiotic as an addition to treatment, rather than testing the GAPS Diet, topical kefir or a substitute for prescribed care. Its actual design is more informative than a broad claim that “probiotics regrow hair.”
Scalp Tenderness in the FAQ
One reader asked about tenderness at the crown and considerable shedding after more than six months on GAPS. The author interpreted that combination through her hair-root toxicity, nutrient and immune account. She then recommended the Nutritional Protocol, minerals and changes to personal-care products.[3]
That answer is an explanation of the reader’s situation. It is not a validated test that makes tenderness proof of an autoimmune flare. The observation guide helps describe pain and shedding without deciding their cause from the combination alone.
Possible Shedding During GAPS Is a Separate Question
Another FAQ asks whether hair loss and tooth discoloration are common during GAPS. Dr. Natasha says they are rare among her patients and discusses them particularly in people she describes as carrying a high toxic load. She proposes that hair containing stored substances might be shed as new hair grows.[4]
The uncertainty belongs to the source: she says the exact process is not known. This is a possible explanation in that answer, not a confirmed “detox-shedding” diagnosis or a guarantee that new hair will replace every lost strand. It gives no at-home way to distinguish that idea from ongoing alopecia or another cause of shedding.
| Source Discussion | What It Can Help You Understand |
|---|---|
| The 2020 alopecia entry | The author’s hair-root, immune and gut framework. |
| The tenderness question | Her interpretation and recommendations for that reader’s combination of symptoms. |
| The hair-loss and tooth question | A proposed explanation with explicit uncertainty about the process. |
| The 2024 probiotic trial | A small study of an adjunct to steroid injections, with its own results and limits. |
Keep an Explanation Connected to the Person
A source explanation is useful when it leads to clearer questions. What type of loss was diagnosed? What does the scalp feel like? What changed before the shedding began? Those questions are more helpful than deciding from the timing that a particular toxin is leaving the body.
Bring the actual history into care, including prescribed treatment and any food, supplement or topical changes. If you would like a place to collect the questions, look for the Care Team Log in the WFLI shop. Keep the source’s explanation and your observations connected without treating them as the same kind of evidence.
References
- Campbell-McBride, N. Gut and Physiology Syndrome (2020), “Alopecia Areata,” p. 408.
- Campbell-McBride, N. Gut and Physiology Syndrome (2020), immune-system chapter, “Specific Responses” and “What Is Autoimmunity?”.
- Campbell-McBride, N. Official GAPS FAQs, Hair and Nails, question 5.
- Campbell-McBride, N. Official GAPS FAQs, Hair and Nails, question 1.
- Navarro-Belmonte MR, et al. The Effect of an Oral Probiotic Mixture on Clinical Evolution and the Gut and Skin Microbiome in Patients with Alopecia Areata: A Randomized Clinical Trial. Cosmetics. 2024;11(4):119. doi:10.3390/cosmetics11040119.
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