The GAPS explanation for psoriasis connects gut flora, the gut wall and immune activity with what appears on the skin. Dr. Natasha Campbell-McBride develops that explanation across both GAPS books and applies it to psoriasis in the 2020 book.[1][2]
If you have already read the psoriasis and GAPS overview, this page follows the reasoning behind it. Food and skin-care details are together in the food and skin-care guide, so you do not have to work through the same instructions twice.
How Gut Flora Fits the Immune System
In Gut and Psychology Syndrome, Campbell-McBride describes beneficial gut bacteria as supporting lymphoid tissue, lymphocytes and immunoglobulins. Secretory IgA helps protect mucous membranes, while neutrophils and macrophages clear unwanted material. She describes reduced IgA production and less effective immune-cell activity when gut flora is disrupted.[2]
The earlier text gives an estimate of roughly 126 billion neutrophils passing through the gut wall each day. It also uses a Th1/Th2 model to explain how a change in gut flora can affect immune balance. These are parts of her general GAPS explanation, not a measurement of immune function in a person with psoriasis.[2]
That earlier book emphasizes establishment of balanced flora around the first twenty days of life. The newer book expands the developmental account to include microbial exposure during pregnancy, birth and feeding. These passages describe her explanation of early microbial development; an adult skin history cannot establish what happened to that individual’s immune system in infancy.[2][3]
From the Gut Wall to the Skin
The 2020 book describes abnormal gut flora producing toxins while a damaged gut wall allows inadequately digested food to pass through. In its autoimmune discussion, continuing exposure to contaminated or altered proteins draws the immune response. Campbell-McBride’s proposed route is to stop that continuing flow by healing the gut and reducing exposure to environmental toxins.[1]
Her Eczema entry adds the skin part of this explanation. It describes toxins leaving through sweat, interacting with skin microbes and contributing to inflammation that appears as a rash. The Psoriasis entry sends readers to the Eczema entry for topical preparations, while retaining psoriasis’s own systemic and autoimmune description.[1][4]
That shared skin-care reference does not make psoriasis a more severe form of eczema. They remain different conditions. The eczema explanation covers that condition separately.
What the Psoriasis Research Adds
The 2019 review cited in the psoriasis entry discusses immune pathways and links with joint and metabolic disease. It supports looking beyond the skin alone. It is not a clinical trial of the GAPS Nutritional Protocol, and those associations do not by themselves establish the gut as the cause of every psoriasis case.[5]
Keeping that distinction clear lets each source do its job. The GAPS book supplies Campbell-McBride’s nutritional explanation and clinical account. The cited review supplies the psoriasis research it actually discusses.
The Medication, Food and Stress History
The earlier GAPS book describes several influences on gut flora. Its examples are useful when putting a history together, rather than choosing one past event to blame.[6]
| Source Discussion | What to Record |
|---|---|
| Antibiotics, including repeated or prolonged courses | The medicine, reason for taking it, duration and any digestive changes you noticed. |
| Steroid drugs and long-term painkillers | The actual product and course, including prescribed treatment that is still helping you. |
| Sugar, processed carbohydrates and a lack of fresh plant foods | The eating pattern at the time, rather than a judgment about one meal. |
| Prolonged physical or psychological stress | The period involved and what changed in sleep, digestion or the skin. |
The book gives recovery estimates after a short, low-dose antibiotic course: one to two weeks for physiological E. coli, two to three for bifidobacteria and Veillonella, and about a month for Bacteroides and peptostreptococci. These are the source’s microbiological examples, not a recovery clock for your skin.[6]
It also describes steroid-related immune suppression and fungal overgrowth, including Candida, and stimulation of haemolytic bacteria and Campylobacter with long-term aspirin or ibuprofen use. Its food and stress discussion describes cumulative influences on flora. None of that identifies a particular prescription as the cause of your psoriasis or supplies a reason to stop it without the prescriber.[6]
The newer book places fermented foods within both Intro and Full GAPS, introduced gradually. That is the practical place for the fermentation discussion here; the loss of traditional fermented foods is not proof of what caused one person’s disease.[7]
Put the Explanation to Use
Use the psoriasis appointment notes to record the history you actually know. You do not need to reconstruct every year before beginning the food and skin-care guide. My course, Your First 30 Days on GAPS, is listed in the WFLI Shop to help with the practical start.
References
- Campbell-McBride, N. Gut and Physiology Syndrome (2020), Immune System, autoimmunity; A–Z, Psoriasis.
- Campbell-McBride, N. Gut and Psychology Syndrome (2004 English text), Immune System, PDF pages 32–36.
- Campbell-McBride, N. Gut and Physiology Syndrome (2020), Gut Flora, developmental account.
- Campbell-McBride, N. Gut and Physiology Syndrome (2020), A–Z, Eczema.
- Rendon, A. and Schäkel, K. Psoriasis Pathogenesis and Treatment. International Journal of Molecular Sciences 20 (2019): 1475. doi:10.3390/ijms20061475.
- Campbell-McBride, N. Gut and Psychology Syndrome (2004 English text), What Can Damage Gut Flora?, PDF pages 39–42.
- Campbell-McBride, N. Gut and Physiology Syndrome (2020), The Full GAPS Diet, gradual fermented-food introduction.
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