How science confirms that ‘an apple a day keeps the doctor away’ is more than just a saying

The phrase “an apple a day keeps the doctor away” has been passed down through generations. But today, experts are exploring whether apple benefits are rooted in science, or if it’s just another health myth.

With nearly 100 million tons produced yearly, apples are one of the most eaten worldwide.

And new research is beginning to reveal the science behind their reputation as a health booster.

Why apples shine as an antioxidant fruit

Apples are more than a crunchy snack. They’re an antioxidant fruit, full of flavanols and polyphenols—natural compounds that reduce inflammation and help protect cells from damage.

These same polyphenols, especially in the skin, have been linked to better heart and gut health.

They may help regulate blood sugar and reduce LDL (“bad”) cholesterol, supporting a healthy metabolism and lowering fat absorption.

Janet Colson, Professor of Nutrition and Food Science at Middle Tennessee State University, explained to BBC that, “Apples don’t have much vitamin C, and they have no iron or calcium, but they have so many other ingredients that promote health and do wonderful things for the body.”

Apple benefits for gut health and heart health

Fiber is another reason apples support health. They’re rich in pectin, a dietary fiber that feeds good bacteria in the digestive system.

Pectin also helps the body absorb less fat and sugar, which helps with weight management and blood sugar control.

Studies back this up: a 2017 review showed that eating apples may lower the risk of type 2 diabetes by 18%.

Another 2022 review found that consistent apple intake can improve cholesterol levels, especially when eaten whole.

These results add weight to the belief that apple benefits are more than just tradition—they offer real support for long-term heart health and digestion.

Separating truth from health myth

Still, not all experts agree that apples alone keep doctors away.

An extensive 2015 study examined this health myth by analyzing data from nearly 9,000 U.S. adults.

It found that while apple eaters were generally healthier, they didn’t visit their doctors significantly less often.

Matthew Davis, Adjunct Associate Professor of Epidemiology at Dartmouth Geisel School of Medicine, explained, “The main finding, that there isn’t much of an association between people who regularly consume an apple a day and the likelihood of visiting a physician, is because it’s complex.”

However, the study also found that people who ate apples daily were less likely to need prescription medications.

That led researchers to suggest a more accurate version of the saying: “An apple a day keeps the pharmacist away.”

How many apples make a difference?

Smaller studies suggest that eating more than one apple daily may increase the benefits.

In one study, 40 adults with mildly high cholesterol were split into two groups—one ate two apples daily. At the same time, the other drank a calorie-matched apple beverage.

After eight weeks, only the group eating whole apples showed a significant drop in cholesterol levels.

In another study involving overweight women, eating three apples daily led to weight loss and improved blood sugar levels. However, some results faded over time.

These findings suggest that apple benefits grow stronger with consistency and work best in a plant-based diet.

Apple benefits are strongest in the peel, experts say

According to Flavia Guzzo, Associate Professor of Plant Biology at the University of Verona, the apple’s skin holds the most value.

“We should eat the peel of apples, as this is where most of the apple’s polyphenols can be found,” she said.

Her research also found that older apple varieties, such as the Pom Prussian from northern Italy, contain higher polyphenol levels than newer, sweeter types.

Modern apples are bred for size and taste, not nutrients.

Still, whether red or green, sweet or tart, both types offer antioxidant fruit compounds that help fight inflammation and support overall wellness.

A small fruit with a big promise

While apples may not replace your doctor, their health benefits are well-supported. They promote gut health, aid heart health, and serve as a simple, affordable source of nutrients.

Colson noted that apples’ long shelf life made them a household staple long before refrigerators.

“Before fridges, you could put apples in the cellar and they would last a long time, and they don’t attract mold,” she said.

Experts agree: eating an apple a day is helpful, but it’s most effective when part of a balanced diet full of fruits, vegetables, and whole foods.

At the end of the day, apple benefits are one small, easy, and tasty way to support your health, one bite at a time.

Here’s a BrightSide video with more facts about eating apples: