Published: 05/28/2026 | Author: Quentin Blount

A new study suggests that intermittent fasting could reduce the risk of opioid addiction, even when exposed to drugs. This potential breakthrough can affect millions of Americans caught in the grip of the opioid epidemic. 

Specifically, researchers at the University of Arizona found that fasting appeared to block the euphoric brain response that drives opioid addiction. The discovery complements local recovery groups like Narcotics Anonymous by opening a low-cost, accessible new avenue for treatment.

The Opioid Crisis Continues

The opioid epidemic continues to devastate communities across the United States. Fentanyl remains the leading driver of overdose deaths and has made opioid addiction more dangerous and harder to escape than at any previous point in the crisis. 

Against that backdrop, any research pointing toward new approaches to prevent or reduce opioid abuse carries significant weight.

That’s what makes this study noteworthy. It’s not a cure, but offers a potential complement to existing opioid treatment options.

What the Intermittent Fasting Study Found

Experts have long recognized that dietary changes are a key non-medication alternative to pain relief. Arizona, where the study originated, is also home to many holistic programs that take full advantage of the desert landscape. 

Doctoral student David Duron followed that train of thought and wondered if intermittent fasting could affect opioid treatment and addiction. Duron’s research team used mice as subjects, uncertain at the outset what they would find.

Their findings suggest that intermittent fasting could have a significant effect on opioid treatment. Fasting improved therapeutic benefits and limited negative side effects, particularly addiction, among mice.

Mice were placed on a six-hour daily eating window while receiving opioid injections over one week. At the study’s conclusion, the fasting group showed significantly improved and longer-lasting pain relief, including in a post-surgical pain model.

Even better, side effects didn’t increase among the mice in the fasting group. Corresponding author Dr. John Streicher noted this could have important implications for addiction specifically.

Fasting May Block the Opioid Reward Response

The mechanism goes to the heart of what makes opioid addiction so difficult to treat.

Opioids activate the brain’s reward circuit no matter the age, which is the basis of addiction. In control mice that ate freely, they reacted to morphine as expected. But in the intermittent fasting group, there was no evidence of reward. The mice didn’t appear to experience the euphoric effect of the drug, or at least didn’t associate the drug with euphoria. 

Fasting especially appeared to play a key role in drug tolerance. In the control group, opioid tolerance increased by as much as 100% over the study period. But the intermittent fasting group saw only a 40% increase in tolerance, meaning they required far smaller dose escalations.

Reduced tolerance escalation could translate to lower overdose risk in real-world opioid treatment settings.

Next Steps

The research team is now working to set up clinical trials based on these findings. The goal: testing intermittent fasting in patients undergoing opioid pain therapy. Dr. Streicher noted that unlike a new pharmaceutical, which can require a decade and millions of dollars to reach approval, a diet-based intervention can start almost immediately.

It is important to emphasize: this research is in early stages, conducted in mice, and should not be used as a substitute for evidence-based opioid addiction treatment. Narcotics Anonymous meetings, medication-assisted treatment (MAT) such as buprenorphine and methadone access remain proven interventions for those living with opioid addiction today.

Naloxone (brand name Narcan) is a life-saving medication that can reverse opioid overdoses and is available without a prescription in most states.

Opioid Addiction Treatment Now

If you or someone you love has an opioid addiction, evidence-based help is available right now. Narcotics Anonymous offers a strong first step with peer support and free and accessible community safe spaces. NA remains one of the most powerful elements of long-term recovery from narcotic addiction.

Dial 800-934-1582(Sponsored) to speak with an expert or browse our directory to find NA meetings anywhere in the country. Like recovery, fasting doesn’t take place in a vacuum, and having colleagues at your side strengthens fellowship for a brighter future.