Lumen Raises $77M as Breath-Based Metabolism Tracking Hits 65 Million Data Points

Lumen has closed a $77 million funding round, marking a significant milestone for the metabolism-tracking startup founded by twin sister triathletes Michal and Merav Mor. The company's handheld device has now collected over 65 million breath samples from more than 350,000 users, positioning it as a leader in consumer metabolic health monitoring.

The funding represents the culmination of a journey that began when the Mor sisters, both PhD physiologists, were training for Ironman competitions. Their quest for peak athletic performance led them to develop technology that could measure metabolic data through a single breath in under one minute. What started as personal experimentation during family dinners has evolved into a comprehensive health platform generating tens of millions of data points across diet, sleep, exercise, and stress metrics.

"We used to take it to dinner on Fridays with our family, and we would ask our sister, can you come here for a sec? Just sit and breathe into the device" Merav Mor recalled. The breakthrough moment came when their diabetic father tested the device and delivered eye-opening results that revealed the broader market potential.

The sisters initially had no business ambitions for their creation. Their academic backgrounds focused on cardiology research, with Merav studying molecular mechanisms behind irregular heart rhythms while Michal concentrated on clinical applications. The transition from research to entrepreneurship required significant persistence, particularly during three years of intensive sensor development work.

An early crowdfunding success on Indiegogo provided validation that consumer demand existed for accessible metabolic monitoring. Before Lumen's market entry, only one million metabolic data measurements existed globally. That number has since expanded to 75 million, demonstrating the company's impact on advancing metabolic health understanding.

The funding positions Lumen to expand its research capabilities and product development as consumer interest in personalized health metrics continues growing. The company has distinguished itself by combining rigorous scientific methodology with user-friendly technology, making previously laboratory-only metabolic testing available to everyday consumers.

Lumen's success also highlights the importance of work-life integration in building sustainable companies. The founders maintain strict policies against late meetings and prioritize family time, reflecting lessons learned from their athletic training and family dynamics. More than half of Lumen's leadership positions and total workforce are held by women, creating what the founders describe as psychological safety for employees.

The substantial funding round validates the market opportunity for personalized metabolic health solutions. As consumers increasingly seek data-driven approaches to fitness and wellness, Lumen's combination of scientific rigor and practical application positions the company for continued growth in the expanding digital health sector.