Music does far more than simply lift our mood — it can trigger profound physiological processes within the body. But does the tuning of that music matter? A growing body of research is comparing the standard 440 Hz tuning with the alternative 432 Hz, and the findings are striking. From reduced anxiety and lower cortisol levels to improved heart rate variability and sharper cognitive performance, four scientific studies suggest that 432 Hz may resonate more naturally with the human body — with benefits ranging from everyday stress relief to support for cancer patients.