For those who’ve been diagnosed with psoriasis, finally having a name for those red, scaly patches on your skin may bring mixed feelings. On one hand, there’s relief in understanding what you’re dealing with. On the other hand, you may have been told there isn’t much you can do beyond managing symptoms.
Here’s what we find encouraging: research continues to reveal that psoriasis involves far more than just “bad genes.” Scientists are discovering several key factors that can influence this condition, and many of these triggers may actually be within our ability to address. This complex immune-mediated condition affects approximately 3% of the US adult population (more than 7.5 million adults), making it one of the most common autoimmune conditions worldwide.
Beyond the physical discomfort, psoriasis carries an emotional burden. Research shows that individuals with psoriasis have a 39% increased risk of depression and 31% increased risk of anxiety compared to the general population. But what if there were ways to support your body’s natural processes? Let’s explore what the research tells us.
The Genetics Behind Psoriasis: More Complex Than You Think
The exact cause of psoriasis remains under investigation, but researchers have identified several genetic factors that can increase susceptibility. Key genes associated with psoriasis include CARD14, IL36RN, and PSORS1.
Here’s an important perspective from Dr. James Elder, professor of dermatology at the University of Michigan: “For every individual with psoriasis who carries the PSORS1 gene, there are 10 other people with the gene who don’t get psoriasis.”
So why do only 2-3% of the population develop this condition? Current thinking suggests it’s because only that percentage have the specific combination of genetic susceptibility AND exposure to certain environmental triggers. In other words, having the genes may increase susceptibility, but this doesn’t automatically mean the condition will develop.
What the Genes Actually Do
The genes associated with psoriasis play roles in regulating inflammation, particularly in the skin:
- CARD14 – When variants occur in this gene, it can lead to increased activation of inflammatory signaling pathways
- IL36RN – This gene produces a protein that normally helps control inflammatory signals; mutations can reduce this regulatory function
- PSORS1 – Located on chromosome 6, this region contains genes involved in immune system function
Understanding these genetic factors helps explain why psoriasis tends to run in families while also showing why genetics alone doesn’t tell the whole story.
Environmental Triggers: The Spark That Can Ignite Inflammation
Triggers can be thought of as the factors that may initiate the cascade of events in genetically susceptible individuals. Research has identified several potential triggers:
Common Psoriasis Triggers
Infections – Streptococcal throat infections have been particularly associated with guttate psoriasis flares. Other infections may also play a role by activating immune responses.
Physical Injury – The Koebner phenomenon describes how psoriasis can appear at sites of skin trauma, including cuts, scrapes, sunburns, or even tattoos.
Stress – Both physical and emotional stress can influence immune function. Research suggests stress may affect the hypothalamic-pituitary-adrenal axis and inflammatory pathways.
Certain Medications – Some medications, including lithium, beta-blockers, and antimalarials, have been associated with psoriasis flares in susceptible individuals.
Lifestyle Factors – Smoking, excessive alcohol consumption, and obesity have all been linked to increased psoriasis risk and severity in research studies.
The Gut-Skin Connection: A Growing Area of Research
One of the most fascinating developments in psoriasis research involves the connection between gut health and skin inflammation. Dr. Alessio Fasano, a world-renowned researcher in autoimmunity, has proposed that autoimmune conditions generally require three factors to develop:
- A genetic predisposition to autoimmunity
- An environmental trigger (food, infection, stress, etc.)
- Increased intestinal permeability (often called “leaky gut”)
This framework, supported by research published in Clinical Reviews in Allergy & Immunology, suggests that supporting intestinal barrier function may be relevant for those with autoimmune conditions.
What Research Shows About the Psoriasis-Gut Connection
Studies have found notable differences in the gut microbiome of people with psoriasis compared to those without:
Altered Bacterial Balance – Research indicates that people with psoriasis often show an increased Firmicutes to Bacteroidetes ratio, which correlates with disease severity.
Reduced Butyrate Production – Perhaps most significantly, studies show reduced butyrate concentrations in people with psoriasis. Butyrate is a short-chain fatty acid produced by beneficial gut bacteria that plays important roles in:
- Supporting intestinal barrier integrity
- Modulating immune responses
- Promoting regulatory T cell (Treg) function
Intestinal Barrier Changes – Research has found elevated markers of intestinal permeability, including claudin-3 and zonulin, in psoriasis patients. Those with altered gut barrier function showed higher disease activity scores.
The Butyrate Connection: Why This Gut Metabolite Matters
Butyrate deserves special attention in the psoriasis conversation. This short-chain fatty acid is produced when beneficial gut bacteria ferment dietary fiber, and it serves as the primary fuel source for the cells lining your colon.
Research on Butyrate and Skin Inflammation
A 2021 study published in the Journal of Investigative Dermatology found that sodium butyrate was able to:
- Support healthy regulatory T cell (Treg) function
- Modulate IL-17 and IL-10 expression
- Support FOXP3 expression (important for immune regulation)
The researchers noted that “Treg isolated from the blood of patients with psoriasis were reduced in their suppressive activity, which was normalized by
Supporting Butyrate Production Naturally
Your body doesn’t directly absorb butyrate from food. Instead, you support its production by:
Eating Prebiotic Fiber – Foods that feed butyrate-producing bacteria include:
- Resistant starch (cooled potatoes, green bananas)
- Onions, garlic, leeks
- Asparagus, artichokes
- Oats and barley
Supporting Gut Microbiome Diversity – A diverse microbiome tends to produce more short-chain fatty acids, including butyrate.
Considering Fermented Foods – Foods like sauerkraut, kimchi, and kefir may support overall gut health.
Supporting Intestinal Barrier Function
Given the research connecting intestinal permeability to autoimmune conditions, many people explore ways to support their gut barrier. Here are some strategies that have been researched:
Dietary Considerations
Identifying Personal Food Sensitivities – Working with a healthcare provider to identify foods that may trigger individual reactions can be valuable. Common considerations include gluten, dairy, and processed foods.
Anti-Inflammatory Eating Patterns – Research has explored the Mediterranean diet’s potential benefits for people with psoriasis, likely due to its emphasis on omega-3 fatty acids, fiber, and polyphenol-rich foods.
Adequate Fiber Intake – Fiber feeds the beneficial bacteria that produce butyrate and other short-chain fatty acids important for gut barrier function.
Lifestyle Factors
Stress Management – Chronic stress can affect both gut barrier function and immune regulation. Practices like meditation, adequate sleep, and regular movement may be supportive.
NSAID Awareness – Research shows that long-term NSAID use can affect intestinal permeability. If you take NSAIDs regularly, discuss alternatives with your healthcare provider.
Supplement Considerations
Some people explore supplements that research suggests may support gut barrier function:
- L-Glutamine – An amino acid that serves as fuel for intestinal cells. Learn more about L-glutamine considerations.
- Zinc – Important for intestinal barrier integrity
- Omega-3 Fatty Acids – May support healthy inflammatory responses
- Probiotics – Certain strains may support gut barrier function and microbiome balance
Always consult with your healthcare provider before starting any supplement regimen.
Conventional Approaches and Their Limitations
It’s important to understand the current medical landscape for psoriasis:
Topical Treatments – Corticosteroids, vitamin D analogs, and retinoids work to manage symptoms locally but don’t address underlying factors.
Light Therapy – Phototherapy can be effective but requires regular sessions and may have limitations for long-term use.
Systemic Medications – Methotrexate, biologics, and other immunosuppressive medications can be effective but come with potential side effects that should be carefully weighed with your healthcare team.
Many of these approaches focus on managing symptoms rather than addressing what might be contributing to the immune dysregulation in the first place.
A Different Perspective: The Autoimmunity Connection
Based on Dr. Fasano’s research, supporting the body’s natural processes might involve addressing all three factors in the autoimmunity equation:
- Genetics – While we can’t change our genes, epigenetic research suggests that gene expression can be influenced by environmental factors.
- Environmental Triggers – Identifying and minimizing personal triggers may reduce the “fuel” for immune activation.
- Intestinal Permeability – Supporting gut barrier function through diet, lifestyle, and potentially targeted supplementation may help maintain healthy immune regulation.
This framework doesn’t promise to “cure” anything. But it does offer a more comprehensive approach to supporting overall health.
For those interested in exploring the gut connection further, we offer resources, including our Leaky Gut Quiz, to help you assess whether gut health might be a factor worth exploring with your healthcare provider.
The Mental Health Connection
We’d be remiss not to address the emotional impact of psoriasis. Research shows significant associations between psoriasis and mental health:
- People with psoriasis have 39% higher risk of depression compared to the general population
- Anxiety risk is 31% higher in those with psoriasis
- Studies show a bidirectional relationship, where depression may also influence psoriasis severity
Interestingly, the gut-brain connection may play a role here as well. The gut microbiome produces neurotransmitters and communicates with the brain via the vagus nerve. Supporting gut health may have implications beyond just skin health.
If you’re struggling emotionally with psoriasis, please reach out to a mental health professional. Your emotional well-being matters.
Frequently Asked Questions
Is psoriasis hereditary?
Psoriasis has a genetic component, but having the genes doesn’t guarantee you’ll develop the condition. Research suggests genetics account for susceptibility, while environmental factors and gut health may influence whether the condition actually develops.
Can diet affect psoriasis?
Research suggests diet may influence psoriasis through several mechanisms, including affecting gut microbiome composition, intestinal permeability, and inflammatory pathways. Anti-inflammatory eating patterns like the Mediterranean diet have shown promise in studies.
What is the connection between gut health and psoriasis?
Studies show people with psoriasis often have altered gut microbiome composition, reduced butyrate production, and markers of increased intestinal permeability. Research suggests supporting gut health may be relevant for overall immune function.
Can psoriasis go into remission?
Many people experience periods where symptoms are minimal or absent. The factors that influence remission aren’t fully understood but may include identifying and avoiding personal triggers, supporting overall health, and working with healthcare providers on appropriate treatment approaches.
What is butyrate and why does it matter for psoriasis?
Butyrate is a short-chain fatty acid produced by beneficial gut bacteria when they ferment fiber. Research shows people with psoriasis often have reduced butyrate levels, and laboratory studies suggest butyrate may support healthy immune regulation, including regulatory T cell function.
Are there natural ways to support skin health with psoriasis?
While psoriasis should be managed with guidance from healthcare providers, research suggests that dietary modifications, stress management, supporting gut health, and avoiding personal triggers may complement conventional approaches. Always discuss any changes with your healthcare team.
Key Takeaways
- Psoriasis involves multiple factors – genetics, environmental triggers, and potentially gut health all play roles
- The gut-skin connection is real – research shows altered microbiome composition and reduced butyrate in people with psoriasis
- Intestinal permeability matters – Dr. Fasano’s research suggests gut barrier function may be relevant to autoimmune conditions
- Butyrate shows promise – this short-chain fatty acid supports immune regulation and can be supported through fiber-rich diets
- Mental health is connected – psoriasis significantly increases depression and anxiety risk; addressing emotional well-being is important
- A comprehensive approach may help – supporting gut health, identifying triggers, and working with healthcare providers offers a more complete strategy
Medical Disclaimer
This content is for informational and educational purposes only and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding a medical condition or before starting any new supplement, diet, or wellness program.
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