Red Blood Cells Absorb More Glucose at High Altitudes, Lowering Diabetes Rates

A new study in mice reveals how red blood cells adapt to low-oxygen environments, potentially providing a new avenue for diabetes treatment.

Apr. 5, 2026 at 2:05pm by Ben Kaplan

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A new study has found that in low-oxygen environments, red blood cells absorb more glucose and convert it into a molecule that helps release oxygen into tissues. This adaptation may explain why diabetes rates are lower in high-altitude locations. The researchers also found that treating mice with an experimental compound that mimics oxygen deprivation can boost red blood cell counts and help regulate blood sugar levels, opening the door to potential new diabetes treatments.

Why it matters

The link between high-altitude living and lower diabetes rates has long been observed, but the underlying mechanism was unclear. This study provides a potential explanation, showing how red blood cells play a pivotal role in glucose regulation in response to low-oxygen conditions. If the findings can be replicated in humans, it could lead to new approaches for managing diabetes, such as therapies that mimic the effects of high-altitude environments on red blood cells.

The details

The researchers exposed mice to low-oxygen chambers, mimicking high-altitude conditions. They found that the mice in low-oxygen environments showed a much smaller spike in blood sugar levels after glucose injections, suggesting they could clear glucose from their blood faster. Further analysis revealed that the red blood cells in these mice absorbed substantially more glucose and converted it into a molecule that helps release oxygen into tissues. The red blood cells also had higher levels of a protein called GLUT1, which helps glucose enter the cells. The researchers then treated mice with an experimental compound called HypoxyStat, which increases the binding of hemoglobin to oxygen, mimicking the effects of oxygen deprivation. This treatment also helped regulate blood sugar levels in the mice.

  • The study was published in April 2026.
  • The researchers exposed mice to low-oxygen conditions for several weeks.

The players

Isha Jain

The lead author of the study, a biochemist at the Gladstone Institutes and the University of California, San Francisco.

Daniel Tennant

A hypoxia and metabolism researcher at the University of Birmingham who was not involved in the study.

Lars Kaestner

A red blood cell biologist at Saarland University in Germany who was not involved in the study.

Sonia Rocha

A biochemist at the University of Liverpool who was not involved in the study.

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What they’re saying

“The work highlights the important role that red blood cells can play in diabetes regulation. That's the concept to be targeted in the future.”

— Isha Jain, biochemist at the Gladstone Institutes and the University of California, San Francisco

“From a systemic point of view, this makes a lot of sense.”

— Lars Kaestner, red blood cell biologist at Saarland University in Germany

“It opens the door to thinking about diabetes treatment in a fundamentally different way.”

— Isha Jain, biochemist at the Gladstone Institutes and the University of California, San Francisco

What’s next

Much more testing is needed before a drug like HypoxyStat could be tested in humans, but the findings suggest potential new directions for diabetes treatment, such as engineering red blood cells to act as better glucose sinks.

The takeaway

This study provides a potential explanation for the long-observed link between high-altitude living and lower diabetes rates, showing how red blood cells adapt to low-oxygen environments by absorbing more glucose. If replicated in humans, these findings could lead to innovative new approaches for managing diabetes, such as therapies that mimic the glucose-regulating effects of high-altitude conditions on red blood cells.