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Integrative Health

Time-Restricted Eating: Benefits, Risks & How To Tailor It To Your Lifestyle

Author: Rachael Ajmera, MS, RD

April 01, 2026

Registered dietitian

By Rachael Ajmera, MS, RD

Registered dietitian

Rachael Ajmera, MS, RD is a registered dietitian and writer based in San Francisco. She holds a master's degree in Clinical Nutrition from New York University and an undergraduate degree in Dietetics.

What is TRE?

Benefits

Sample schedules

Choosing your window

Side effects

FAQ

Image by BONNINSTUDIO / Stocksy

April 01, 2026

Time-restricted eating (TRE) is one of the few eating patterns that doesn't have any complicated rules or regulations to remember and allows you to enjoy all your favorite foods, provided you fit all of your meals into an allotted time slot.

In addition to the flexibility and freedom that this plan offers, TRE also touts a long list of possible health benefits, ranging from increased longevity to weight loss, improved blood sugar control, and more.

We reached out to a few of the top experts on time-restricted eating to understand how it impacts your health, who it might be a good fit for, and how you can find a schedule that works for you.

What is time-restricted eating?

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Time-restricted eating is a form of intermittent fasting that involves limiting your food intake to a specific window of time each day.

In most cases, people will limit their food intake to a six- to 12-hour slot and fast during the remaining hours outside of this time period. Though some people limit their intake during fasting periods to water only, others may choose to opt for calorie-free beverages, like black coffee or tea, or eat a small number of calories.

In recent years, TRE has soared in popularity thanks to the unique flexibility that it offers. Contrary to other diet plans that focus on meticulously measuring grams of carbs, fat, or protein, TRE doesn't require you to log your food intake and enables you to eat whatever you choose within a specific time period each day.

Plus, TRE doesn't make you majorly restrict calories like other forms of fasting such as alternate-day fasting (ADF), one meal a day (OMAD), and 5:2 fasting.

Summary

Time-restricted eating (TRE) involves restricting the number of hours a day that you eat food—usually to a six- to 12-hour window. There aren't typically restrictions on what you can eat during your feeding window.

Benefits of TRE

Emerging research shows that time-restricted eating has a number of potential benefits, ranging from enhanced longevity to increased weight loss and a reduced risk of chronic disease. Here, we take a deep dive into the science behind each:

1.It can enhance longevity by promoting cellular repair and autophagy

According to Humaira Jamshed, Ph.D., a researcher and associate professor at the Dhanani School of Science and Engineering, TRE has been shown to promote cellular repair1 and autophagy, a process in which the body breaks down damaged cells and replaces them with healthy new cells.

"Research suggests that autophagy2 may have a protective effect against aging, cancer, and other diseases," says Jamshed.

In one study conducted by Jamshed and her colleagues, participants followed an early time-restricted eating plan for four days, which involved limiting their food intake to the hours of 8 a.m. to 2 p.m. each day. By the end of the study, researchers observed increased markers of autophagy1, suggesting that TRE could potentially have anti-aging effects.

Impressively enough, one 2022 animal study also found that restricting food intake to a two-hour window of time each day increased the life span3 of mice by a whopping 35%. Researchers in this study concluded that TRE could reduce inflammation and other age-related changes, resulting in enhanced longevity.

2.It can promote weight loss via calorie restriction

"TRE may be promising for people who have struggled with weight loss or calorie counting in the past," explains Kelsey Gabel, R.D., Ph.D., an assistant professor and intermittent fasting researcher at the University of Illinois at Chicago.

"From the current data, it appears that people naturally restrict calories4 by about 20% when eating in a shorter window every day. This seems to result in somewhere between a 2- to 4% weight loss in two to three months without counting calories," says Gabel.

While it may sound too good to be true, this found in a 2018 pilot study4 conducted by Gabel and other researchers. The study found that, on average, people who limited their food intake to an eight-hour period each day consumed 341 calories less per day and lost 2.6% of their body weight over a 12-week period.

Jamshed notes that TRE may also help regulate levels of ghrelin and leptin, two hormones involved in regulating hunger and satiety. Interestingly, one study found that early time-restricted e