Psoriasis Supplements: What Has Strong Evidence, What Has Mechanism Only & What to Avoid
Psoriasis is a systemic immune-mediated condition, and its management rarely comes down to a single intervention. Nutritional support sits within a comprehensive approach — it doesn't replace medical treatment, but addressing the nutritional dimensions of psoriasis is increasingly understood as a legitimate and meaningful part of long-term management.
This guide covers the nutrients with the most evidence for psoriasis, what each specifically does, what the research shows, and what a realistic expectation of benefit looks like. Several have their own dedicated articles in this series — this guide brings them together with the appropriate emphasis on each.
Why vitamins are linked to psoriasis
Psoriasis is an immune-mediated inflammatory condition.
Because inflammation, immune balance, and skin repair are involved, researchers have studied nutrients including:
vitamin D
omega-3 fatty acids
zinc
selenium
B vitamins
Some deficiencies appear more common in people with psoriasis
Vitamin D: the most evidence-backed nutrient for psoriasis
Vitamin D has both the most clinical evidence and the most specific mechanistic relevance of any supplement for psoriasis. It is covered in depth in the vitamin D psoriasis article in this series. The key points:
Vitamin D receptors (VDRs) are expressed on keratinocytes and immune cells relevant to psoriasis. Vitamin D regulates keratinocyte differentiation and proliferation — directly targeting the accelerated cell turnover that produces plaques. It modulates the Th17/Th1 immune responses central to psoriatic inflammation. And it reduces IL-17, IL-23, and TNF-α production — the same cytokines targeted by several psoriasis biologics.
Multiple studies have found lower serum vitamin D levels in psoriasis patients compared to controls, with inverse correlations between vitamin D status and PASI severity scores. Supplementation trials have produced variable results but are more consistently positive in people with confirmed deficiency.
In the UK, vitamin D insufficiency is extremely common, particularly from October to April when UVB levels are insufficient for skin synthesis. For people with psoriasis — who often avoid sun exposure to reduce heat-triggered flares — deficiency is prevalent year-round. Supplementation with vitamin D3 at 1,000–2,000 IU daily is a reasonable baseline; testing serum 25(OH)D through your GP allows dosing to be calibrated to actual status.
Omega-3 fatty acids: anti-inflammatory evidence specific to psoriasis
Omega-3 fatty acids — particularly EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) — have some of the most specific clinical trial data for psoriasis of any supplement category.
The mechanism is direct: EPA competes with arachidonic acid for cyclooxygenase and lipoxygenase enzymes, reducing production of pro-inflammatory prostaglandins and leukotrienes (particularly leukotriene B4, which is elevated in psoriatic skin). This is a targeted anti-inflammatory effect on the same inflammatory pathway active in psoriasis.
Several randomised controlled trials have found that fish oil supplementation (providing EPA and DHA) reduces PASI scores, reduces erythema and scaling, and reduces serum inflammatory markers including leukotriene B4 in psoriasis patients. A systematic review found benefit particularly for erythema reduction. The effect is modest compared to systemic treatments but meaningful in the context of nutritional supplementation.
The important distinction from the seeds article: ALA (the plant-based omega-3 in flaxseeds and chia seeds) converts to EPA and DHA at only 5–10% efficiency. For psoriasis-relevant anti-inflammatory effects, direct EPA/DHA from fish oil or algae-based supplements is substantially more effective than plant-based ALA sources.
Vitamin B12
Topical vitamin B12 (cobalamin) has been studied specifically for psoriasis — particularly as a component of a topical avocado and B12 cream — with some published trial evidence showing reductions in PASI scores and improved psoriasis severity compared to a vitamin E cream control. This is distinct from oral B12 supplementation, which has less evidence for psoriasis.
For people who are vegetarian or vegan, B12 supplementation is a nutritional necessity regardless of skin condition; animal products are the only significant dietary source. The connection to the B12-acne article in this series is worth noting: oral high-dose B12 may theoretically worsen any acne-like follicular inflammation through microbiome changes, and psoriasis patients who also have acne should be aware of this.
Zinc: immune regulation and the psoriasis-specific evidence
Zinc is a trace mineral with specific and well-documented relevance to psoriasis. Multiple studies have found lower serum zinc levels in psoriasis patients compared to controls, with correlations between zinc status and disease severity.
Zinc's relevance to psoriasis operates through several pathways: it regulates T-cell function, reducing the overactive Th17 response central to psoriasis; it inhibits the enzyme 5α-reductase (involved in androgen metabolism and inflammatory signalling); it has antioxidant properties; and it is required for normal keratinocyte function. Zinc supplementation has shown modest but consistent improvements in psoriasis severity in some trials.
Plant-source zinc (from seeds and legumes) is less bioavailable than animal-source or supplemental zinc due to phytic acid binding, as noted in the seeds article. A dedicated zinc supplement provides a consistent, bioavailable dose.
Selenium: the antioxidant connection
Selenium is worth specific mention because its relevance to psoriasis is more specific than general antioxidant support.
Psoriasis is associated with significantly elevated oxidative stress — free radical production from the chronic inflammatory environment depletes antioxidant defences. Selenium is a cofactor for glutathione peroxidase, one of the body's primary antioxidant enzymes. Several studies have found lower serum selenium in psoriasis patients, and the relationship between selenium status and psoriasis severity has been documented across multiple populations.
Additionally, as covered in the thyroid article in this series, selenium's role in thyroid hormone metabolism is relevant — psoriasis patients have elevated rates of autoimmune thyroid disease, and selenium supports thyroid function and reduces anti-TPO antibody levels in Hashimoto's.
The UK diet provides variable selenium — it depends heavily on the selenium content of soil where food is grown, and UK soils are generally selenium-poor compared to North America. People not eating regular amounts of oily fish, meat, and Brazil nuts may have marginal selenium status.
Recommended Products
BetterYou DLux 1000 Vitamin D Oral Spray
1,000 IU vitamin D3 per spray, absorbed sublingually without requiring a fat-containing meal. A practical daily UK option.
Minami MorEPA Platinum High-Strength Omega-3 Fish Oil
a high-EPA formulation (over 85% EPA) in a concentrated softgel. High EPA relative to DHA is appropriate for the anti-inflammatory focus relevant to psoriasis. For those preferring a plant-based option, an algae-derived EPA/DHA supplement provides the same active forms without fish.
Higher Nature Selenium 200µg
selenomethionine, the organic form with best bioavailability. 200µg is within the established safe range and the dose most studied in clinical research.
Magnesium
The connection between magnesium, stress, and psoriasis is covered in depth in the magnesium article in this series. Magnesium supports the HPA axis stress response — depleted magnesium amplifies cortisol reactivity, which drives inflammatory cascades relevant to psoriasis flares. It also contributes to anti-inflammatory signalling and is depleted by chronic inflammatory states.
Magnesium glycinate or citrate are better absorbed than the cheaper magnesium oxide form common in lower-quality supplements. The Drought Skin Support Formula includes magnesium specifically for this reason.
Fumaric acid: the pharmaceutical natural compound
Fumaric acid esters (FAEs) are worth a brief mention because they are one of the few naturally occurring compounds that has made the leap to pharmaceutical psoriasis treatment — Fumaderm (dimethyl fumarate) is a licensed systemic treatment for moderate-to-severe psoriasis in Germany and has been used for decades. In the UK, dimethyl fumarate (Skilarence) is licensed for moderate-to-severe psoriasis.
Fumaric acid is found naturally in the human body and in some plant foods. The pharmaceutical form delivers concentrations far beyond dietary sources. This is included here not as a supplement recommendation but to illustrate that the boundary between "natural nutrient" and "pharmaceutical treatment" is not as clear as it sometimes appears in psoriasis discussions.
What the evidence doesn't support
Several supplements are commonly mentioned online for psoriasis without meaningful clinical evidence: turmeric (covered in the turmeric article — plausible mechanism, limited evidence, significant bioavailability challenges), probiotics (emerging evidence, covered in the probiotics psoriasis article), and evening primrose oil (GLA has some theoretical relevance but clinical evidence for psoriasis is poor). These are not contraindicated but should not be the primary focus of a supplement strategy for psoriasis.
Building a sensible supplement strategy
The hierarchy of nutritional evidence for psoriasis, from strongest to weakest:
Vitamin D — correct deficiency as a priority; most evidence and most specific mechanism. Omega-3 (EPA/DHA) — direct anti-inflammatory effect on psoriasis-relevant pathways; modest but documented clinical evidence. Zinc — consistently lower in psoriasis patients; documented immune regulatory role. Selenium — specific antioxidant relevance; commonly marginal in UK diet. Magnesium — stress regulation relevance; commonly depleted by chronic inflammation.
Skin support for psoriasis-prone skin
Drought's Skin Support Formula brings together vitamin D, zinc, magnesium, vitamin C, CoQ10, B vitamins, and 8 other nutrients in a daily supplement designed specifically for reactive and inflammatory skin. It addresses the multi-nutrient approach that single-supplement strategies cannot replicate — covering the documented deficiencies and mechanistic pathways of psoriasis in one consistent daily dose. Made in the UK, suitable for vegetarians, formulated for long-term daily use.
FAQs: Vitamins & psoriasis
What vitamins are best for psoriasis?
Vitamin D has the strongest and most specific evidence — it modulates Th17 immune activity through VDR-mediated transcription, upregulates filaggrin expression for barrier support, and deficiency is documented in up to 80% of psoriasis patients with severity correlating with deficiency depth. Omega-3 EPA and DHA compete with arachidonic acid for cyclooxygenase enzymes, reducing leukotriene B4 — a pro-inflammatory eicosanoid specifically elevated in psoriatic plaques — with multiple RCTs showing meaningful PASI reductions. Zinc addresses both immune regulation and barrier repair — 5-alpha-reductase inhibition reduces the androgen-driven sebaceous activity relevant to some psoriasis presentations, and zinc deficiency is consistently documented in psoriasis patients. Magnesium supports HPA axis cortisol regulation — addressing the stress-flare pathway that worsens psoriasis in a significant proportion of patients.
Does vitamin D cure psoriasis?
No — psoriasis is a complex immune condition with no nutritional cure. Vitamin D addresses specific pathways (keratinocyte regulation, Th17 modulation) and correcting deficiency supports disease management alongside other treatments.
Can fish oil improve psoriasis?
Some randomised controlled trials show fish oil (providing EPA and DHA) reduces PASI scores and inflammatory markers in psoriasis. The anti-inflammatory effect is specific — EPA competes with arachidonic acid in the leukotriene pathway active in psoriatic skin.
Are multivitamins effective for psoriasis?
Generally no — for two specific reasons. First, most generic multivitamins provide vitamin D at 400 IU — well below the 1,000–2,000 IU daily range most relevant to correcting the deficiency documented in psoriasis patients. Second, generic multivitamins typically exclude omega-3 EPA and DHA entirely — the most consistently evidenced supplement for psoriasis requires a separate fish oil or algae oil supplement at meaningful doses. A targeted approach — vitamin D3 at 1,000–2,000 IU, omega-3 providing at least 1,000mg combined EPA and DHA, zinc bisglycinate or citrate at 15–25mg elemental zinc — addresses the specific deficiencies documented in psoriasis populations at clinically relevant doses. GP testing of serum vitamin D and zinc before supplementing provides a baseline that makes targeted correction more precise than generic multivitamin use.
Is zinc good for psoriasis?
Yes — zinc addresses psoriasis through three complementary mechanisms. It inhibits 5-alpha-reductase, reducing androgen-driven sebaceous activity relevant to some psoriasis presentations. It supports keratinocyte barrier repair through zinc finger transcription factor activity — directly relevant to the barrier dysfunction in psoriatic skin. And it has documented antimicrobial activity against S. aureus — the bacterium that colonises psoriatic plaques and amplifies inflammatory severity through toxin production. Zinc deficiency is consistently documented in psoriasis patients with severity correlating with deficiency depth. Zinc bisglycinate provides the best bioavailability — absorbing through amino acid transporters rather than competing with other minerals. Dose 15–25mg elemental zinc daily, not more than 40mg sustained to avoid copper depletion through competitive intestinal absorption.
What should I avoid supplementing with psoriasis?
High-dose biotin above 1,000mcg daily — biotin interferes with multiple laboratory blood tests including troponin and thyroid function, relevant if monitoring is required during psoriasis treatment. High-dose preformed vitamin A (retinol) above 1,500mcg RE daily — fat-soluble accumulation and liver toxicity risk at sustained high doses, particularly relevant if also taking acitretin or other retinoids. Iodine supplementation beyond dietary levels — iodine excess has documented associations with psoriasis worsening through thyroid-mediated mechanisms. Any supplement making claims to "cure" or "clear" psoriasis — no supplement produces this outcome and products making these claims are typically low-quality formulations without evidence.
How long do supplements take to work for psoriasis?
Eight to twelve weeks minimum — and the mechanism explains why. Vitamin D's VDR-mediated Th17 modulation accumulates over weeks rather than producing acute effects. Omega-3's eicosanoid competition requires sustained elevated tissue EPA levels before the shift in leukotriene production becomes clinically meaningful — this takes four to six weeks of consistent intake to establish, with skin effects appearing a further four to six weeks after the tissue-level changes. Zinc's barrier repair effects operate through keratinocyte function that changes slowly. Intermittent or inconsistent supplementation produces insufficient tissue-level change regardless of dose — daily consistency over the full assessment period matters more than the specific dose within the reasonable range.
Can supplements replace psoriasis medication?
No. For moderate-to-severe psoriasis, medical treatment (topical, phototherapy, systemic, or biologic) is essential. Nutritional support is a complementary approach — meaningful alongside treatment, not instead of it.
Summary
The most evidence-backed nutritional interventions for psoriasis are vitamin D (correcting deficiency; direct keratinocyte and immune regulatory mechanism), omega-3 EPA/DHA (direct anti-inflammatory effect on leukotriene B4 and psoriatic inflammation; modest but documented clinical evidence), zinc (immune regulatory role; consistently lower in psoriasis patients), and selenium (antioxidant defence; commonly marginal in UK diets). These work through complementary pathways and are best addressed together rather than in isolation. None replaces medical treatment for moderate-to-severe disease, but together they address nutritional gaps that are more prevalent in psoriasis populations and that the condition's inflammatory environment actively depletes.
In short:
Certain deficiencies may worsen psoriasis
Some supplements can support inflammation balance
Research is mixed and inconsistent
Vitamins alone usually won’t control psoriasis fully
Vitamins and supplements are often discussed as “natural” psoriasis remedies—but the evidence is mixed and often overstated online.
While correcting deficiencies and supporting overall nutrition may help, vitamins alone rarely control psoriasis fully.
The most effective long-term approach supports your skin across multiple pathways—not just through one supplement or nutrient.
Start your skin support journey →
Written by the Drought Skin team — specialists in natural support for psoriasis, eczema and acne
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