Could this diet make you a better doctor? This neurologist thinks so

By MDLinx staff

Published May 7, 2025

Key Takeaways

Industry Buzz

"Early studies in humans suggest a similar potential benefit in certain neurologic conditions, and it may work through a combination of improved insulin sensitivity to regulate sugar levels that can harm the brain, increased production of neurons and brain plasticity, and decreased inflammation and changes in the way the brain uses ketones." — Neurosurgeon Rupa Juthani, MD

Intermittent fasting (IF) has been widely discussed in the wellness community, but should physicians—who juggle long shifts, cognitive overload, and unpredictable schedules—really be adopting it? Neurosurgeon Rupa Juthani, MD, recently shared her perspective in an Instagram Reel: “Intermittent fasting may have some positive effects on your physical health as well as on your cognitive function,” she said.

But does the science back this up, and more importantly, is it practical for doctors?

The case for IF in medicine

Cognitive performance is a non-negotiable for physicians, and some research suggests IF could enhance it. Studies show that fasting increases brain-derived neurotrophic factor (BDNF), promotes neuroplasticity, and may even provide neuroprotection against age-related cognitive decline. ^[] Dr. Juthani noted that fasting helps her maintain sharper focus throughout the day, avoiding the sluggishness that often follows large meals.

Beyond brain function, fasting has metabolic advantages, including improved insulin sensitivity and reduced systemic inflammation. ^[]Many physicians deal with stress-induced eating, disrupted circadian rhythms, and metabolic strain from their demanding schedules—IF could provide a structured approach to better health without excessive meal prep.

The reality: Can doctors realistically fast?

Despite its benefits, intermittent fasting isn’t always easy for physicians.

Unpredictable Schedules: Unlike office workers with set breaks, doctors often eat when they can, not when they should. A delayed meal during a long OR case or an unexpected consult could turn an intentional fast into an unplanned period of low energy.
High-Caloric Demand: For surgeons, emergency physicians, and those in other physically demanding specialties, fasting could lead to decreased endurance or impaired concentration during long procedures.
Shift Work Challenges: Overnight shifts already disrupt circadian rhythms. Trying to align fasting windows with erratic schedules can make things even more complicated, potentially leading to fatigue or hypoglycemia.

Should physicians try IF?

Intermittent fasting isn’t a one-size-fits-all solution—it’s a tool. Some doctors thrive on it, reporting improved focus, stable energy levels, and better metabolic health. Others find it impractical or even counterproductive in their line of work.

What You Should Know:

For those interested in trying IF, flexibility is key. Experiment with different fasting windows, stay hydrated, and ensure nutrient-dense meals during eating periods. If fasting starts to interfere with performance, it’s not the right fit.

At the end of the day, IF isn’t a magic bullet—it’s just one strategy among many for optimizing health and performance. The real question isn’t whether fasting works, but whether it works for you.