Dead Sea Treatment for Psoriasis: What the Clinical Evidence Shows

The short answer

Dead Sea treatment can improve plaque psoriasis for some people, especially when mineral bathing is combined with medically managed ultraviolet exposure. The strongest controlled evidence is not a vacation study: it is a phase III randomized trial in which 367 adults with moderate to severe psoriasis received either narrowband UVB alone or narrowband UVB while bathing in a 10% Dead Sea salt solution. The combined treatment produced a greater improvement in psoriasis severity after up to 35 sessions, and exploratory analysis still favored it at six months.[1]

Studies of treatment at the Dead Sea also report large short-term improvements, but most are observational and combine sunlight, bathing, time away from work, climate, and clinical supervision. They cannot show how much benefit came from any one component. Dead Sea climatotherapy is an adjunctive treatment, not a cure, and it should not replace a dermatologist’s treatment plan.

What counts as Dead Sea psoriasis treatment?

Research uses several different interventions under similar names:

1. Synchronous balneophototherapy: a 10% Dead Sea salt bath given with clinic-based 311 nm narrowband UVB.[1]
2. Onsite Dead Sea climatotherapy: an individualized program that usually combines controlled sun exposure and bathing at the Dead Sea.[2-10]
3. Salt bathing alone: bathing in a Dead Sea salt solution without phototherapy.[11]
4. Mud, sulfur baths, or rehabilitation programs: different interventions studied mainly for rheumatic conditions, not substitutes for psoriasis evidence.

These categories should not be treated as interchangeable. A positive study of clinic-based salt bathing plus UVB does not prove that an over-the-counter bath salt, mud mask, or brief recreational visit will produce the same outcome.

Strongest controlled evidence: salt bathing plus narrowband UVB

The largest randomized study enrolled 367 people with moderate to severe psoriasis. Participants were assigned to 311 nm narrowband UVB either alone or with synchronous bathing in a 10% Dead Sea salt solution. The primary analysis included 356 participants. At the end of treatment, after no more than 35 sessions or earlier clearance, the combined group had a clinically relevant and statistically significant 49.5% between-group advantage in relative PASI improvement. Both treatments were reported as safe in that trial.[1]

This is important evidence for the combined outpatient procedure. It does not establish that salt bathing alone is equally effective, and it does not reproduce every feature of an onsite Dead Sea stay.

What onsite climatotherapy studies show

An 81-patient comparative study helps separate two major components. After four weeks, the reported PASI improvement was 28% with Dead Sea bathing alone, 73% with sun exposure alone, and 83% with both. The authors concluded that sun exposure was the principal factor, with bathing potentially adding benefit.[2]

Other studies report strong short-term results for the full combined program:

1. In a prospective 18-person cohort, four weeks of individualized sun exposure and bathing was associated with an 88% mean PASI reduction. Among eight complete responders followed to confirmed recurrence, visible symptoms returned after a mean of 93.8 days. The authors concluded that the immediate effect was substantial but long-term disease control was not observed.[3]
2. A 27-person prospective study reported an 81.5% PASI reduction after 28 days, alongside changes in epidermal thickness, keratinocyte proliferation, and inflammatory-cell markers. Average remission was 3.3 months.[4]
3. A 64-person observational cohort reported a 95.5% mean PASI improvement after four weeks. The median time to a new lesion after clearance or near-clearance was 23.1 weeks, and the median duration until half of the treatment gain was lost was 33.6 weeks.[5]
4. A 70-person community cohort reported a 75.9% mean PASI reduction after climatotherapy.[6]
5. A 119-person prospective observational study found improved psoriasis-related quality of life at departure and at three months, without an untreated comparison group.[7]
6. A 40-person relapse survey reported a median 4.8 months to a first visible lesion, but the study included people returning because their psoriasis had relapsed. That design cannot represent people with longer-lasting clearance.[8]

Older and treatment-center studies also report high response rates, but they are uncontrolled, retrospective, or summarized in a narrative review with treatment-center affiliation.[9-10,24] Their findings support short-term effectiveness of the combined program, while offering less certainty about comparative benefit or long-term control.

What the mechanism studies can and cannot tell us

Biopsy studies show that inflammatory and proliferative markers can move toward non-lesional levels after climatotherapy.[4,12] A 2024 cohort comparison found that both Dead Sea climatotherapy and secukinumab produced histologically clearer skin, but the treatments left different gene-expression patterns. It was not a randomized efficacy comparison and does not show that the two treatments are equivalent.[12]

Laboratory studies report effects of concentrated minerals or mineral-containing formulations on fibroblasts, leukocytes, reconstructed skin, and UV-stressed skin.[13-17] These studies can generate hypotheses about barrier function, oxidative stress, and inflammatory signaling. They do not prove a clinical outcome in a person with psoriasis, and they cannot justify claims for an untested finished product.

Does Dead Sea salt alone help psoriasis?

The evidence for salt bathing alone is less persuasive than the evidence for combined treatment. In a double-blind study of 30 participants, both Dead Sea salt baths and common salt baths improved PASI scores over three weeks. The Dead Sea group improved more numerically, but the between-group difference was not statistically significant.[11]

This finding does not support a universal home-bath protocol. People with psoriasis should ask a dermatologist whether bathing is appropriate for their skin, how it fits with current medication, and whether cracks, infection, or irritation change the advice.

Why the Dead Sea’s ultraviolet environment matters

Measurements at the Dead Sea show that ultraviolet radiation is attenuated relative to a site above sea level, with stronger attenuation of shorter erythema-producing UVB wavelengths than of longer UVB wavelengths.[18-19] Long-term measurement programs have been used to design month-specific and hour-specific medical exposure schedules.[20-22]

This spectral pattern does not make the sun harmless. UVA and UVB are still present. The published treatment protocols are individualized, and unnecessary ultraviolet exposure remains a concern. A systematic review found no evidence of increased skin neoplasia in the reviewed Dead Sea treatment literature, but it did report increased actinic skin damage in repeatedly treated patients.[23]

How to discuss treatment with a dermatologist

Ask these questions before planning treatment:

1. Is climatotherapy appropriate for the type and severity of my psoriasis?
2. How should prescribed topical, phototherapy, biologic, or systemic treatment be managed during the program?
3. Do my medicines or medical history increase photosensitivity or heat risk?
4. How will ultraviolet exposure be measured and adjusted for skin type, season, and response?
5. What follow-up plan will manage relapse after the short-term improvement?

Do not stop prescribed treatment or begin a high-exposure sunlight program without medical advice.

Safety and practical limits

Mineral water can sting fissured or scratched skin. Salt bathing may increase dryness or irritation. Ultraviolet exposure can cause erythema and sunburn and contributes to cumulative skin damage. Dead Sea water is dangerous to ingest in substantial quantities because of its electrolyte concentration.[23]

People with photosensitivity, a history of skin cancer, active infection, extensive open skin, significant cardiovascular disease, or medicines that increase sun sensitivity need individualized medical advice. Children and people with severe psoriasis should use a medically supervised program.

Frequently asked questions

Is Dead Sea climatotherapy a cure for psoriasis?

No. Studies report short-term improvement and periods of remission, followed by recurrence for many patients. The 18-person prospective cohort explicitly concluded that long-term disease control was not observed.[3]

Is bathing in Dead Sea salt the same as visiting the Dead Sea?

No. Onsite climatotherapy combines several factors, especially controlled sunlight and bathing. A separate 81-person study found a smaller improvement with water alone than with sun exposure or the combined program.[2]

Can I reproduce the clinical studies with bath salt at home?

The strongest randomized psoriasis trial combined a specified 10% salt solution with 311 nm narrowband UVB under a treatment protocol.[1] That is not the same as unsupervised home bathing. A salt-only trial did not show a statistically significant between-group advantage over common salt.[11]

How long can improvement last?

Duration varies. Observational studies report averages or medians from about three months to several months, but estimates differ by study design, treatment length, response definition, and selection of participants.[3-5,8]

Is the Dead Sea sun safe?

It has a different measured spectrum, but it is not risk-free. Medical protocols control exposure by skin type, season, time, and response. Sunburn and cumulative ultraviolet damage remain concerns.[18-23]

Medical note

This page summarizes research and is not medical advice. Psoriasis can require prescription treatment and ongoing monitoring. Discuss any treatment change, travel-based therapy, salt bathing, or ultraviolet exposure with a qualified clinician who knows your medical history.

Sources cited in this article

Reference numbers were renumbered for this standalone preview.

1. Klein A, et al. Randomized phase III synchronous Dead Sea salt balneophototherapy plus NB-UVB versus NB-UVB alone. DOI: https://doi.org/10.1111/j.1468-3083.2010.03840.x
2. Even-Paz Z, et al. Dead Sea sun versus Dead Sea water in psoriasis. DOI: https://doi.org/10.3109/09546639609089534
3. Emmanuel T, et al. Prospective Dead Sea climatotherapy cohort. DOI: https://doi.org/10.3389/fmed.2020.00083
4. Harari M, et al. Clinical, histologic, and immunologic response to Dead Sea climatotherapy. DOI: https://doi.org/10.1067/S0190-9622(03)00916-2
5. Harari M, et al. Four-week climatotherapy and remission duration. DOI: https://doi.org/10.1111/j.1365-4632.2007.03278.x
6. Cohen AD, et al. Community study using PASI and BPSS. DOI: https://doi.org/10.1080/09546630500375841
7. Quality-of-life prospective study after Dead Sea climatotherapy, local record P066.
8. Follow-up survey on efficacy and relapse. DOI: https://doi.org/10.1155/2024/7835970
9. Even-Paz Z, et al. Older 110-patient climatotherapy series. DOI: https://doi.org/10.1016/S0190-9622(85)70087-4
10. Short-term and retrospective climatotherapy studies, local records P064 and P069. DOI: https://doi.org/10.2340/00015555-0340 and https://doi.org/10.15761/GOD.1000177
11. Dead Sea bath salt versus common salt for psoriasis. DOI: https://doi.org/10.1111/j.1468-3083.1997.tb00509.x
12. Secukinumab and Dead Sea climatotherapy molecular cohort comparison. DOI: https://doi.org/10.3390/ijms25116086
13. Skin penetration of minerals in psoriatic participants and animals. DOI: https://doi.org/10.1016/0031-6989(85)90123-7
14. In vitro fibroblast study of selected Dead Sea salts. DOI: https://doi.org/10.1159/000139397
15. In vitro magnesium and leukocyte mediator study. DOI: https://doi.org/10.1515/bchm3.1995.376.12.739
16. Reconstructed and ex vivo skin research on Dead Sea minerals. DOI: https://doi.org/10.1111/exd.13918
17. Nrf2-related laboratory research on Dead Sea water. DOI: https://doi.org/10.4236/jcdsa.2022.122010
18. Dead Sea basin ultraviolet attenuation measurements. DOI: https://doi.org/10.1002/(SICI)1097-0088(199712)17:15%3C1697::AID-JOC231%3E3.0.CO;2-9
19. Ultraviolet radiation properties for Dead Sea photoclimatotherapy. DOI: https://doi.org/10.1046/j.1365-4362.2003.01683.x
20. Solar ultraviolet dose monitoring in psoriasis treatment, local record P031.
21. Safety analysis of solar phototherapy at the Dead Sea. DOI: https://doi.org/10.1016/S0190-9622(98)70504-3
22. Twenty-five years of UV measurements and protocol development. DOI: https://doi.org/10.3390/ijerph191912364
23. Katz U, et al. Systematic review of Dead Sea treatment evidence and safety. DOI: https://doi.org/10.1016/j.semarthrit.2012.02.006
24. Harari M. Psoriasis Treatment at the Dead Sea: 40 Years of Clinical Studies. PMID: https://pubmed.ncbi.nlm.nih.gov/38493334