New research suggests probiotics may play a surprising role in helping the body adapt to high-altitude environments where oxygen levels are lower.
In a recent randomized, double-blind, placebo-controlled study, researchers studied 17 volunteers traveling from sea level to a research station located at about 12,740 feet in California’s White Mountains. Scientists monitored breathing, oxygen levels, sleep patterns and symptoms of altitude sickness during the study period.
Participants who received probiotic supplements showed higher oxygen saturation levels during both daytime and nighttime compared with those given a placebo. They also reported fewer symptoms of acute mountain sickness (AMS), a condition that can occur when people ascend to high elevations too quickly.
What the Findings Suggest
Acute mountain sickness can affect anyone, from recreational hikers to elite athletes, when oxygen availability drops at high altitudes. Symptoms may include headaches, fatigue, dizziness and sleep disturbances.
Researchers found that those taking probiotics appeared to acclimatize more effectively to altitude, suggesting that gut microbes may influence how the body responds to low-oxygen environments. While the exact mechanism is still being studied, scientists believe the gut microbiome may influence respiratory function, inflammation and metabolic processes involved in oxygen regulation.
Potential Implications
Current options for managing altitude sickness are limited and many rely on medications. The researchers noted that probiotics could represent a simple, non-drug approach to help support the body’s adaptation to high altitude. They also suggested the findings may eventually have broader applications, including research into conditions associated with low oxygen levels, such as sleep apnea, respiratory illness or intensive care settings.
The Bigger Picture
The study adds to growing evidence linking gut health to functions beyond digestion, including immune response, metabolism and respiratory physiology. However, researchers caution that more studies with larger populations are needed before firm conclusions can be drawn.
Reviewed by: Dr Cheryl Yeo
Bio: Dr Cheryl Yeo is the founder of iAM Health. She has a PhD in food science and nutrition, dedicating more than a decade to research on metabolic disorders and weight management, functional food ingredients, and the science behind metabolism-focused supplements and microbiome-driven health therapies. Her work deepened her understanding of how targeted nutrition, including probiotics and digestive support, can influence long-term wellbeing.
Connect with Dr Cheryl Yeo: cheryl@iamhealth.sg