After 60 Years, Scientists Discovered Metformin Works Directly in Your Brain — What This Means for Americans
After 60 years of mystery, a July 25, 2026 study found metformin works directly in the brain through a hidden Rap1 neural circuit — not just in the liver. A 40-year pharmacist explains this discovery, what it means for diabetes treatment, and the broader implications for brain health and longevity.