Overview
By DeadSea.com Editorial
Last reviewed: September 2026
Small studies found better oxygenation or exercise measures in selected people with advanced hypoxemic lung disease, COPD, or cystic fibrosis while they were at the Dead Sea. The most defensible explanation is the basin’s low altitude and higher barometric pressure. The studies do not prove that inhaled minerals treat lung disease, that the air is allergen-free, or that a Dead Sea holiday can replace oxygen, medication, or pulmonary care.
This is promising but narrow evidence. Most location studies enrolled between 10 and 14 participants, while a larger cystic fibrosis camp study combined the destination with physiotherapy, exercise, and a high-calorie diet.[1-4]
Why low altitude changes oxygen availability
At about 400 meters below sea level in the older respiratory studies, barometric pressure was higher than in Jerusalem or at sea level. The proportion of oxygen in air did not become magically different. Higher pressure increased the inspired partial pressure of oxygen, which can affect people whose blood oxygen is already low.
That is not the same as improving the underlying lung structure. In the COPD and cystic fibrosis studies, resting spirometry did not improve even when oxygenation or exercise performance did.[2,3]
The respiratory signal comes from pressure and oxygen availability in small selected groups, not from a proven mineral aerosol.
What happened in advanced lung disease studies?
In a 1994 cohort, 10 oxygen-dependent patients with different advanced lung diseases were tested in Jerusalem and after six days at the Dead Sea. Median arterial oxygen pressure rose from 51.6 to 67.0 mm Hg, sleep oxygenation improved, and exercise performance increased. Spirometry did not change, and there was no concurrent control group.[1]
A later study followed 11 people with hypoxemic COPD during a three-week stay. Mean arterial oxygen pressure rose during the visit, and six-minute walking distance increased. Blood gases returned to baseline after the group went back to Jerusalem, while some exercise measures remained higher at the two-week follow-up.[2]
These participants had severe, documented hypoxemia and lived at a higher elevation. Their results should not be generalized to every person with COPD, asthma, or shortness of breath.
What did cystic fibrosis research find?
A randomized crossover study tested 14 people with moderate to severe cystic fibrosis lung disease at sea level and at the Dead Sea. After 72 hours, peak oxygen consumption and oxygen saturation during exercise were modestly better at the Dead Sea, but resting lung function did not change.[3]
A retrospective study examined 94 people who attended three-week winter rehabilitation camps. The program included daily physiotherapy, physical activity, and a high-calorie diet. Complete lung-function and oxygen data were available for only 35 participants. Improvement during and after camp cannot be assigned to altitude alone because several interventions happened together and the missing follow-up data were substantial.[4]
What about asthma and nasal symptoms?
A 1998 paper combined a review of magnesium in asthma with uncontrolled treatment-center experience at the Dead Sea. It proposed mineral absorption as one possible mechanism, but it did not provide a controlled Dead Sea asthma trial or measure an inhaled environmental mineral dose.[5] That paper is not enough to call Dead Sea air an asthma treatment.
Studies of formulated Dead Sea salt nasal sprays and irrigations are separate. They tested a product placed in the nose for rhinitis or chronic rhinosinusitis, not breathing the outdoor air.[6,7] One intervention cannot inherit evidence from the other.
Planning a visit with a lung condition
If your condition is stable, a clinician may still consider the trip reasonable. The key is to plan for the whole journey, not just the shore. The 2026 CDC Yellow Book recommends a pre-travel consultation for people with chronic illness before non-refundable bookings, with extra planning for oxygen, devices, medication, and access to care.[8]
- Ask the clinician who manages your lung condition whether the flight, road transfer, heat, walking, and planned activities fit your current stability.
- Do not reduce oxygen, inhalers, airway-clearance therapy, or other prescribed treatment because the destination is below sea level.
- Carry medication and essential supplies in their original containers, with enough for delays. Confirm how inhalers, nebulizers, oxygen concentrators, and batteries will be transported and stored.
- Choose accommodation and activities that leave room for shade, cooling, rest, and a quick return indoors. Use the Dead Sea heat-safety guide for day-of-visit decisions.
- Identify where appropriate care is available before travel if your condition is severe or has recently changed.
Plan medication storage, heat exposure and sun sensitivity with the prescriber before travel. The Dead Sea health evidence guide separates research programs from an ordinary holiday.
Sources
- Kramer MR, et al. Effect of natural oxygen enrichment at low altitude on oxygen-dependent patients with end-stage lung disease. 1994. DOI 10.7326/0003-4819-121-9-199411010-00005.
- Kramer MR, et al. Rehabilitation of hypoxemic patients with COPD at low altitude at the Dead Sea. Chest. 1998. DOI 10.1378/chest.113.3.571.
- Falk B, et al. Effect of low altitude at the Dead Sea on exercise capacity in cystic fibrosis. 2006. DOI 10.1002/ppul.20342.
- Goldbart AD, et al. Effects of rehabilitation winter camps at the Dead Sea on European cystic fibrosis patients. 2007. PMID 18085039.
- Harari M, et al. Magnesium in the management of asthma and clinical experience at the Dead Sea. 1998. DOI 10.3109/02770909809048955.
- Friedman M, et al. Hypertonic Dead Sea salt nasal irrigation in chronic rhinosinusitis. 2006. DOI 10.1097/01.mlg.0000216798.10007.76.
- Friedman M, et al. Dead Sea salt versus saline irrigation with nasal steroids in chronic rhinosinusitis. 2012. DOI 10.1002/alr.21003.
- United States Centers for Disease Control and Prevention. Travelers with Chronic Illnesses, CDC Yellow Book 2026. Updated 19 May 2026.
Frequently asked questions
Is there more oxygen at the Dead Sea?
The oxygen percentage is not the key difference. Higher barometric pressure at low altitude raises the inspired partial pressure of oxygen. Small studies found better oxygenation in selected hypoxemic patients during a stay.[1,2]
Does Dead Sea air improve lung function?
Not in a general sense. Several studies reported better oxygenation or exercise measures while resting spirometry remained unchanged. Those outcomes are different.
Can the Dead Sea treat asthma?
No controlled Dead Sea asthma trial identified here establishes a treatment effect. A 1998 review and treatment-center report proposed mechanisms, but did not isolate the location, minerals, or a controlled intervention.[5]
How long do respiratory changes last?
Results differ by study. Blood gases in the COPD cohort returned to baseline after participants returned to Jerusalem, while some exercise measures remained higher two weeks later.[2] That is not a universal duration.
Can I stop supplemental oxygen at the Dead Sea?
Do not change oxygen or other prescribed treatment without the responsible clinician. The respiratory studies were monitored research or rehabilitation settings, not instructions for self-adjustment.
Medical disclaimer
This article summarizes research for education and travel planning. It is not a diagnosis, fitness-to-travel decision, oxygen prescription, or treatment plan. Consult a qualified pulmonary or travel-medicine clinician before travel if you have a significant lung condition.
