Willow Laboratories

Willow Laboratories is a health technology innovation company based in Irvine, California, dedicated to advancing the future of metabolic health and noninvasive monitoring. Founded in 1998, the company is the inventor of Rainbow® technology, a patented multi-wavelength optical platform capable of non-invasively measuring a wide range of physiological parameters including hemoglobin, carboxyhemoglobin, and methemoglobin—now used in leading hospitals worldwide.

Building on decades of clinical expertise, Willow is focused on addressing the growing diabetes and metabolic health crisis through a combination of advanced medical devices and accessible digital solutions.

By integrating cutting-edge hardware with intelligent software platforms such as Nutu™, Willow empowers individuals to take control of their health through sustainable lifestyle change and early intervention.