Locations:
Search IconSearch

Want to Lower Your Risk of Heart Disease, Diabetes and Colon Cancer? You May Want to Double Your Fiber Intake

Study: Adding fiber has big benefits

A plate of high-fiber fruits include strawberries, raspberries, blackberries and blueberries on a bed of lettuce and avocado.

Pears. Oatmeal. Popcorn. Artichokes. Most of us have probably heard at one time or another that we should eat more fiber. But now a recent study shows that adding fiber to your daily diet can benefit your health in a big way.

Advertisement

Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy

The study looked at data on 4,635 adults from 185 prospective studies.

What protective effect was found

Researchers found that people who ate between 25 and 29 grams of fiber per day saw a 15 to 30% decrease in their risk of developing heart disease, diabetes and colon cancer.

“Americans are getting, on average, about 12 and a half grams of fiber each day, which isn’t enough,” says wellness expert Michael Roizen, MD, who did not take part in the study. “This study showed a sizeable reduction in health risks from getting at least 25 grams (or double the average intake) of fiber.”

The study also showed people who ate higher amounts of fiber ― found in foods such as fruits, vegetables and whole grains ― also had lower blood pressure, lower cholesterol and lower body weight.

Easy ways to up your fiber intake

One easy way to add more fiber to your diet? Use your refrigerator, Dr. Roizen says.

Previous research shows carbohydrates, like pasta or sweet potatoes, can become more fiber-like by putting them in the refrigerator overnight. When cooled, these carbs become resistant starch, and in turn, create a smaller spike in blood sugar when eaten the next day.

Eating naturally fiber-rich snacks like raspberries, strawberries, avocados and walnuts is a good way to get more fiber in your diet.

Advertisement

And whenever there is an opportunity to swap enriched white bread for 100% whole-grain bread, Dr. Roizen says: “Go for it!”

“Replace low-fiber foods with high-fiber foods, and you can painlessly improve your health ― who knew it was so easy?” he says

Complete results of the study can be found in The Lancet.

Advertisement

Learn more about our editorial process.

Related Articles

Looking up at a moringa tree
January 13, 2026/Nutrition
A Quick Introduction to Moringa

The leaves and pods from this tree are rich in essential nutrients

Ground cassava flour in wooden bowl with wooden spoon, with cassava root/yuca nearby
December 24, 2025/Nutrition
Health Benefits of Cassava, aka Yuca

This starchy root vegetable is a staple in many global cuisines — but it has to be prepared correctly, or it can cause serious concerns

Alfalfa sprouts in white bowl
December 23, 2025/Nutrition
4 Health Benefits of Alfalfa

These delicate green sprouts can give you an extra dose of vitamin K and other nutrients — but they’re not safe for everyone

Selection of high-protein foods, like salmon, chicken, lentils, eggs, nuts and dairy
December 19, 2025/Nutrition
Try These 21 High-Protein Foods

Edamame, lentils and chicken breast are good sources of protein

Baked whole rainbow carrots on a baking tray
December 17, 2025/Nutrition
The Health Benefits of Carrots

Eating this root vegetable can help support your eye, heart and brain health

Fresh bunch of cilantro on cutting board
December 16, 2025/Nutrition
The Health Benefits of Cilantro

The flavorful herb is full of antioxidants that may help regulate blood sugar

Bowl of sauerkraut with fork
December 15, 2025/Nutrition
Is Sauerkraut Good for You?

This fermented cabbage is full of probiotics and fiber, and can help your gut, heart and brain health

Pile of dried jujube fruits
December 11, 2025/Nutrition
What Is Jujube?

The small red fruit is a good source of potassium and vitamin C — and may support your gut and brain health

Trending Topics

Person lifting weights, standing in front of oversized periodization training phases chart
How To Make Periodization Training Work for You

You can improve your athletic performance over time by breaking up your workout regimen into focused cycles

Woman researching viagra on her cell phone
Viagra for Women: What To Know

The little blue pill might help with physical arousal, but there are better treatments for low libido in women

Person lying in bed in early morning, with hand on their head
Why Am I Waking Up With a Migraine?

Sleep issues and certain foods can lead to an early morning headache

Ad