CBD and Psoriasis: What a Clinical Trial Actually Found

The itching. The flaking. The self-consciousness. If you live with psoriasis, you’ve probably tried a lot of things. Here’s what a new randomized trial says about CBD.

Living in Your Skin Shouldn’t Feel Like a Battle

For millions of people, psoriasis isn’t just a skin condition — it’s a daily reminder that something in the body is misfiring. The immune system triggers an overproduction of skin cells, causing thick, scaly, itchy patches that can appear anywhere on the body. It’s chronic. It’s unpredictable. And for many people, existing treatments work only partially or come with side effects that create new problems.

That’s why a growing number of people with psoriasis are asking about CBD. And now, for the first time, a proper randomized clinical trial has examined that question directly.

About the Study

Researchers from Mahidol University’s Faculty of Medicine Ramathibodi Hospital, Suan Sunandha Rajabhat University, and Vajira Hospital in Thailand conducted a randomized, double-blind, placebo-controlled trial specifically looking at oral CBD oil in chronic plaque psoriasis patients.

Participants were given either 60mg of CBD oil per day or a placebo for the duration of the study. The primary outcome measured was the Psoriasis Area and Severity Index (PASI) — the gold standard tool for assessing psoriasis severity in clinical research. Secondary outcomes included disease severity, quality of life, and, interestingly, sleep parameters.

What They Found

The CBD group did not show a statistically significant improvement in overall PASI scores — meaning CBD oil at 60mg/day didn’t dramatically reduce the total area and severity of psoriasis plaques in this study.

However, two findings stood out:

• Itch scores decreased notably by Week 8 in the CBD group — a meaningful result for anyone who has experienced psoriatic itch, which can be as debilitating as the visible skin changes themselves
• Sleep onset latency decreased by Week 6 — meaning CBD users fell asleep faster, though this effect didn’t persist to the end of the study

Adverse events were mild to moderate and similar across both groups, confirming that CBD was well-tolerated.

Reading Between the Lines

Before concluding that CBD doesn’t work for psoriasis, it’s worth understanding what this study was and wasn’t. Twenty-eight participants is a relatively small sample size. The dose tested — 60mg/day orally — may not be optimal. Oral CBD faces a significant bioavailability challenge: because it is fat-soluble, much of it is metabolized before reaching the bloodstream when taken by mouth.

Prior research using topical CBD has shown more promising results. A 2022 randomized trial published in the Journal of the European Academy of Dermatology and Venereology found that twice-daily application of a 2.5% CBD ointment produced significant improvements in psoriasis symptoms compared to placebo over 12 weeks, with no adverse effects.

CBD’s anti-inflammatory, immunomodulatory, and anti-proliferative mechanisms are well-documented in the scientific literature. It reduces secretion of inflammatory cytokines such as IFNγ and TNFα in psoriatic cells — the very drivers of the disease’s pathophysiology.

The current study’s authors themselves recommend future research with higher doses and extended durations. That’s not a defeat — it’s science working the way it should.

What the Itch Finding Means for You

Psoriatic itch is often more distressing to patients than the visual appearance of plaques. It’s driven by neuroinflammation, not just the immune response, which is why standard anti-inflammatories don’t always help. CBD’s ability to reduce itch — even at a relatively modest oral dose — is a clinically significant finding worth paying attention to.

Practical Takeaways

• If you’re exploring CBD for skin concerns, topical application may offer more targeted benefits than oral use alone
• Combining approaches — topical CBD on affected areas alongside an oral CBD routine — is a strategy some researchers believe may provide broader effects
• The itch-relief finding at Week 8 suggests that patience and consistency are key — CBD’s effects on skin conditions may build over time
• As always, discuss with your dermatologist or healthcare provider before adding CBD to your skincare regimen

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About the Original Study

Title: Efficacy and safety of cannabidiol oil in psoriasis: a randomized, double-blind, placebo-controlled trial Year: 2026 Journal: Journal of Dermatological Treatment, Vol. 37, No. 1 DOI: 10.1080/09546634.2025.2604448 PubMed: https://pubmed.ncbi.nlm.nih.gov/41459647/

Authors — Faculty of Medicine Ramathibodi Hospital, Mahidol University / Suan Sunandha Rajabhat University / Vajira Hospital:

• W. Roongpisuthipong — Faculty of Medicine Ramathibodi Hospital, Mahidol University[2]
• T. Klangjareonchai — Suan Sunandha Rajabhat University[2]
• S. Kurathong — Vajira Hospital, Bangkok[2]
• A. Roongpisuthipong — Faculty of Medicine Ramathibodi Hospital, Mahidol University[2]

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