A viral TikTok trend is telling a generation to eat more beans, and the dietitians are, for once, mostly applauding.
It’s called fibermaxxing, and it has racked up well over 160 million views, according to one news report. It’s been around since last summer, but it’s still all over social media and search bars. So let’s do the math on what it asks of you, and where the experts say to hit the brakes.
The Gap in Your Diet
Most of us aren’t close to the recommended amount. Registered dietitian Grace Derocha, a spokesperson for the Academy of Nutrition and Dietetics, told WXYZ that the average American gets about 15 to 18 grams of fiber a day. The goal is 25 to 38 grams, depending on whether you’re a woman or a man. A study in the American Journal of Lifestyle Medicine, cited by the Columbia Gorge News report, found that only about 5% of American adults meet the recommendation.
Age shifts the target a bit. According to Healthline, men over 50 need about 30 grams a day and women over 50 about 21 grams.
Why Dietitians Like This Trend
Fiber is good for more than digestion. As Axios notes, it’s linked to benefits for your bowels, blood sugar, and heart, and it lowers the risk of colorectal cancer, a disease that has been showing up more often in younger adults. The trend also does something unusual for diet fads: it’s about adding food, not cutting it out.
The Fiber Math, Using Real Foods
Here’s where it gets practical. Derocha’s examples give you a rough sense of how fast it adds up. A large banana or half a cup of beans has about 5 grams each. A quarter cup of dried mango has 3 to 4 grams, and so does a cup of leafy greens. A U.S. News report adds that most fruits and vegetables supply about 1 to 2 grams per half cup, and a quarter cup of nuts supplies about 3 grams.
So a lunch of a salad with greens and beans can get you roughly 12 grams on its own, Derocha said. Add a banana as a snack, a handful of nuts, and some whole grains at other meals, and you’re approaching the target without anything exotic. It’s a good reminder that you don’t need a trend to hit your number. You need a few reliable habits.
Where the Trend Goes Too Far
This is where dietitians draw the line. Janet Helm, a registered dietitian quoted by Axios, said the trend goes too far when people go beyond the recommended range. Eating too much too quickly can cause bloating, gas, and diarrhea. Derocha added that, depending on the type of fiber, a sudden jump can lead to constipation by making stools too bulky, or to loose stools if insoluble fiber irritates the gut.
There’s also a “supplement trap.” Fiber powders and fortified snacks are a growing business, but Helm’s advice is to choose fiber by the company it keeps. An apple or a potato with the skin on brings vitamins and minerals along with the fiber, while a manufactured food with added fiber might not offer much else.
How to Raise Your Fiber the Smart Way
The experts quoted in these reports agree on the basics. Go slowly, adding fiber over several weeks instead of overnight. Drink plenty of water, since fiber needs fluid to do its job. Favor whole foods, including fruits, vegetables, beans, nuts, and whole grains. Derocha says supplements can help if you’re struggling, but food should come first.
Who Should Be Careful
Not everyone should dive in. Healthline’s reporting says older adults and people with certain health conditions should check with a doctor before raising their fiber intake. A dietitian quoted there noted that people with gut conditions such as IBS, SIBO, or IBD may need to temporarily reduce fiber and then add it back slowly. This article is general information, not medical or nutrition advice.
A Word About Health Advice From Your Feed
Fibermaxxing is a rare case where the viral advice mostly lines up with what experts say. That isn’t typical. A survey cited by Modern Salon found that 87% of millennial and Gen Z TikTok users get some health tips from social media, but only about 2% of that content aligns with official public health guidelines. We looked at how that plays out in our piece on TikTok and self-diagnosis. The safest habit is to check the claim against a reliable source before you act on it.
The Bottom Line
Fibermaxxing isn’t a miracle, and “maxxing” isn’t really the goal. The goal is to reach a healthy amount of fiber, gradually, from real food. If a TikTok trend gets more people to eat beans, fruit, and whole grains, that’s a win worth cheering, as long as the “max” stays reasonable.
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