Clair raises $11.6M to rewrite the rules of hormone health

A San Francisco startup founded by two recent college graduates has raised $11.6 million in seed funding to launch a jewelry-inspired wristband that continuously tracks hormones. Clair Health was founded by 2025 Stanford grads Jenny Huan and Abhinav Agarwal, who say the product will become the world’s first wearable designed specifically to understand hormone health. A company blog post said the wristband captures more than 130 biomarkers “spanning cardiovascular, thermoregulatory, autonomic, electrodermal, body composition, respiratory, acoustic, sleep and activity domains.” Clair notes that the prototype was validated on more than 40 women across 127 complete menstrual cycles. The funding will support ongoing research and the expected product launch in November 2026.