A new report from circadian technology company Timeshifter argues that healthcare has spent decades perfecting what medicine is given — while largely ignoring when it is given relative to each patient's biological clock. For the hospitality industry, where rotating and overnight shifts are a structural reality, the findings carry direct operational weight.
The report, authored by Dr. Steven W. Lockley, Co-Founder and Chief Scientist at Timeshifter, draws on a systematic survey of more than 100 clinical trials spanning fifty years. Roughly three-quarters of those trials showed outcomes that were significantly shaped by time of day. Examples from the data include older adults receiving a morning flu vaccine producing more antibodies than those vaccinated in the afternoon, a common cholesterol medication performing better when taken at night, and heart-valve surgery patients treated in the afternoon experiencing less cardiac muscle injury than morning-surgery patients. These are not edge-case conditions — they include high blood pressure, asthma, arthritis, and cancer.
The Shift Work Connection
The hospitality sector is among the industries most exposed to circadian disruption, running 24-hour operations that require substantial numbers of workers to cycle through early-morning, late-night, and rotating schedules. That workforce overlap with healthcare — where the same dynamics play out among nurses, EMTs, and hospital staff — is exactly why Timeshifter is targeting both sectors simultaneously. In 2026, the company launched pilots with healthcare organizations worldwide to assess how its shift work app, built on the same core platform as its jet lag app, can improve sleep quality, alertness, and health outcomes for rotating-shift employees.
Mickey Beyer-Clausen, Co-Founder and CEO of Timeshifter, framed the stakes plainly: "Every year, promising drugs fail in clinical trials not because the science was wrong, but because nobody asked when the medicine was given relative to each patient's own biological clock. Timing is not a footnote to healthcare — it may be one of the most overlooked levers we have for making existing treatments work better, for more people, at lower cost."
What Operators Should Watch
Beyond workforce wellness, the report introduces the concept of "chronodiagnostics" — the principle that a single diagnostic reading, such as cortisol or cholesterol levels, carries different clinical meaning depending on the biological time at which it was taken. Individual circadian rhythms can vary by up to eight hours across a population, meaning an 8 a.m. blood draw or medication dose represents a very different biological moment from one person to the next. For hospitality HR and benefits teams managing employee health programs, that variability is a practical consideration when scheduling occupational health screenings or administering workplace wellness initiatives.
Dr. Lockley sees near-term tools as the bridge to broader adoption. "Once a clinician can check a patient's circadian time as easily as their blood pressure, we will be able to read every test result in the right biological context and time every drug, vaccine, and procedure to when it will do the most good and the least harm," he said.
Circadian Awareness Day, observed annually on July 24 (24/7), was the occasion for the report's release. Timeshifter has established hospitality-sector partnerships that include InterContinental Hotels & Resorts, making its circadian tools directly relevant to hotel operators thinking about staff wellbeing and labor retention. As the science matures, operators who address shift-work circadian disruption proactively may gain an edge in both workforce health costs and employee retention — two pressure points that continue to define the restaurant and hospitality labor landscape.
Written by Michael Politz, Author of Guide to Restaurant Success: The Proven Process for Starting Any Restaurant Business From Scratch to Success (ISBN: 978-1-119-66896-1), Founder of Food & Beverage Magazine, the leading online magazine and resource in the industry. Designer of the Bluetooth logo and recognized in Entrepreneur Magazine's "Top 40 Under 40" for founding American Wholesale Floral, Politz is also the Co-founder of the Proof Awards and the CPG Awards and a partner in numerous consumer brands across the food and beverage sector.
