»Ê¹ÚÍøÖ·

© 2025
NPR News, Colorado Stories
Play Live Radio
Next Up:
0:00
0:00
0:00 0:00
Available On Air Stations
In the NoCo

Fasting three days per week may be the best diet strategy for weight loss, a new CU study says

Ways To Subscribe
A woman with long brown hair smiles at the camera.
Courtesy Victoria Catenacci
A new study out of CU Boulder — led by endocrinologist Victoria Catenacci — shows that a three-days-per-week fasting regimen is more effective than daily calorie restriction. "We found that the intermittent fasting group ate significantly less than the daily caloric restriction group. So at the end of the day, it seemed that that diet was easier to adhere to over time," said Catenacci.

If you've tried a slew of dieting routines with minimal success – think the Keto Diet, Caveman Diet, or South Beach Diet – a new study says you might have better luck fasting a few days per week.

University of Colorado researchers recently found that participants who fasted three days each week were more successful at losing weight than participants who followed a reduced-calorie diet every day. The fasting group saw 60 percent more weight loss than the group that reduced its calorie intake every day.

Victoria Catenacci led . She’s an associate professor of endocrinology at the University of Colorado School of Medicine. She spoke with Erin O’Toole about why the three-days-per-week fasting model was helpful for many participants – and why it was an easier plan to stick with. (She also noted that if you have a health condition, it’s important to check with your doctor before adopting a diet like this.)

»Ê¹ÚÍøÖ·'s In The NoCo is a daily slice of stories, news, people and issues. It's a window to the communities along the Colorado Rocky Mountains. The show brings context and insight to the stories of the day, often elevating unheard voices in the process. And because life in Northern Colorado is a balance of work and play, we celebrate the lighter side of things here, too.
Ariel Lavery grew up in Louisville, Colorado and has returned to the Front Range after spending over 25 years moving around the country. She co-created the podcast Middle of Everywhere for WKMS, Murray State University’s NPR member station, and won Public Media Journalism awards in every season she produced for Middle of Everywhere. Her most recent series project is "The Burn Scar", published with The Modern West podcast. In it, she chronicles two years of her family’s financial and emotional struggle following the loss of her childhood home in the Marshall Fire.
As the host of »Ê¹ÚÍøÖ·â€™s new program and podcast In the NoCo, I work closely with our producers and reporters to bring context and diverse perspectives to the important issues of the day. Northern Colorado is such a diverse and growing region, brimming with history, culture, music, education, civic engagement, and amazing outdoor recreation. I love finding the stories and voices that reflect what makes NoCo such an extraordinary place to live.
Brad Turner is an executive producer in »Ê¹ÚÍøÖ·'s newsroom. He manages the podcast team that makes In The NoCo, which also airs weekdays in Morning Edition and All Things Considered. His work as a podcaster and journalist has appeared on NPR's Weekend Edition, NPR Music, the PBS Newshour, Colorado Public Radio, MTV Online, the Denver Post, Boulder's Daily Camera, and the Longmont Times-Call.