Advancing Technology for
Prevention, Transforming Care
At Willow™, we are committed to shaping a healthier future by developing smart, sustainable
solutions that support prevention, improve outcomes, and drive long-term impact.
Willow Laboratories is a health-innovation company based in Irvine, CA, the inventor of rainbow technology, capable of measuring a dozen parameters noninvasively, including hemoglobin, carboxyhemoglobin, and methemoglobin, used in leading hospitals worldwide. Building on decades of clinical expertise, Willow is focused on tackling the growing diabetes and metabolic-health crisis through both medical devices and accessible digital tools designed to empower sustainable lifestyle change.
Whats Makes Nutu Unique?
Our program reflects:
A dynamic, personalized target based on your age, sex, height, weight, goals, diet, activity, and sleep.
Protein focus for satiety, muscle support and overall weight health.
A daily metabolic Nutu Score that evolves as you do— no calorie counting. just stay balanced in the green zone.
Nudges aligned with the latest Dietary Guidelines for Americans
Rainbow Technology
Subtext: Rainbow Technology is an advanced patient safety system designed to improve measurement accuracy, continuous monitoring, and real-time clinical decision support in healthcare settings. It seamlessly integrates noninvasive sensors and intelligent software to detect risks early and help clinicians respond faster and with greater precision. By reducing the potential for human error and improving visibility across patient data, it creates a safer and more efficient care environment.
SpO2
Peripheral Oxygen
Saturation
PR
Pulse Rate
Hi
Perfusion Index
SpHb
Noninvasive Hemoglobin
SpOC
Oxygen Content
ORi
Oxygen Reserve Index
SpMet
Methemoglobin Level
RPVi
Pleth Variability Index
RRp
Respiratory Rate
SpCO
Carboxyhemoglobin Level
Understand your body in real time without a drop of blood
Ember® is a noninvasive, multi-parameter tracking platform that uses advanced optical technology to measure key blood markers, such as hemoglobin and oxygen saturation, in real time. By translating complex physiological data into simple, actionable insights, Ember helps you understand how your body responds to training, recovery, and daily habits—so you can perform and feel your best.
Featured In
We welcome partnerships with forward-thinking organizations across
healthcare, research, and industry to collaboratively advance innovation
and improve health outcomes at scale.
Have an idea or opportunity in mind? Let’s explore how we can work together to turn innovation
into measurable health impact. Contact us at partners@willowlabs.ai