Walk through a grocery store right now and two words seem to be following you everywhere: protein and fiber.
They’re on cereal boxes, snack bars, drinks and even ice cream. But new grocery-shopping data suggests this isn’t just clever packaging. Americans really are changing what they put in their carts—and fiber may actually be gaining ground faster than protein.
Grocery searches reveal what shoppers really want
Instacart analyzed purchases made during the first half of 2026 and compared them with the same period last year.
The results were striking.
According to Instacart’s newly released grocery trend data, searches containing the word “protein” increased 12.7% year over year, while searches for “fiber” jumped 26.4%.
In other words, fiber interest grew more than twice as quickly.
The actual shopping carts tell a similar story.
Eight of the 10 food categories that gained the most share of items sold were naturally high in protein or fiber.
This isn’t simply an internet wellness trend anymore. People appear to be changing what they buy.
Some surprisingly ordinary foods are booming
The most interesting part of the data may be what Americans are actually purchasing.
You might expect protein powders and bars to dominate.
Instead, many of the biggest movers are decidedly old-school foods.
Sweet potatoes rose 28%. Frozen edamame climbed 25%. Cottage cheese increased 10%. Chicken thighs were up 12%, while Greek and Icelandic yogurt increased 8%.
Even dried prunes jumped 23%.
Some of the hottest foods in 2026 aren’t new products at all. They’re foods our grandparents would instantly recognize.
That’s an encouraging development because protein and fiber don’t require specialty products or supplements.
Eggs, yogurt, beans, lentils, nuts, seeds, vegetables, fruits, whole grains, fish and poultry can provide plenty of both.
Protein isn’t going anywhere
Protein has been having a cultural moment for several years, and shoppers clearly haven’t lost interest.
Protein drinks increased 15%, protein bars rose 9% and cottage cheese climbed 10%.
Canned sardines, however, blew nearly everything else away with a 51% year-over-year increase.
Protein has moved from the fitness aisle into everyday eating.
There are several reasons.
Consumers have become more interested in maintaining muscle as they age. High-protein foods are frequently promoted for satiety, and the popularity of GLP-1 weight-loss medications has intensified conversations about eating enough protein while consuming less food.
But more protein isn’t automatically better.
Harvard’s Nutrition Source notes that the basic recommended dietary allowance for adults is about 0.8 grams of protein per kilogram of body weight per day.
That’s roughly 50 grams for someone weighing 140 pounds and about 70 grams for someone weighing 200 pounds, although individual needs vary with age, health and activity.
The bigger question isn’t simply how many grams you’re getting.
Where your protein comes from matters too.
Fiber may be the more interesting story
Protein gets the flashy packaging.
Fiber has traditionally been associated with bran cereal, prunes and conversations nobody particularly wants to have at breakfast.
That’s changing.
The social-media trend known as “fiber-maxxing” has turned getting more fiber into something younger consumers actually brag about.
And grocery data suggests they’re putting their money where their mouths are.
Sweet potatoes, edamame, yams, pears, chia seeds, broccolini, pumpkin seeds and dried prunes all showed notable growth.
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The FDA’s Daily Value for fiber is 28 grams based on a 2,000-calorie diet.
Unlike protein, which many Americans already consume in substantial amounts, fiber is a nutrient many people have good reason to pay more attention to.
RELATED ARTICLE: 13 Ways To Get More Fiber In Your Diet That You Might Actually Follow
You don’t need “high protein” printed on the package
Food companies have certainly noticed the trend.
Protein is now being added to products that traditionally weren’t considered significant protein sources.
Instacart reports that Cheerios Protein increased its share of the cereal category by 157% year over year. Eggo Protein Waffles climbed 101%.
New products include protein-enhanced versions of popcorn, cereal, granola, frozen desserts and even sparkling beverages.
There’s nothing inherently wrong with fortified foods.
But a giant “PROTEIN” label doesn’t automatically make a product more nutritious.
A protein-enhanced snack can still contain substantial sodium, saturated fat or added sugar.
Similarly, a food without a protein claim can provide plenty naturally.
Eggs aren’t branded “high protein” across the shell. Neither are lentils.
Whole foods can give you both
One reason the protein-and-fiber trend is interesting is that you don’t necessarily have to choose sides.
Several foods deliver both.
Beans and lentils are obvious examples. Edamame provides protein and fiber. Nuts and seeds contribute both, as do some whole grains.
Pairing foods can accomplish the same thing.
Greek yogurt with berries and chia seeds combines protein and fiber. Eggs with whole-grain toast and avocado do too.
The simplest approach may be building meals around foods that naturally contain these nutrients rather than hunting for products engineered to advertise them.
Don’t “maxx” everything overnight
Social media loves extremes.
If some protein is good, more must be better. If fiber is good, suddenly everyone needs to double their intake by Tuesday.
Your digestive system may disagree.
A sudden large increase in fiber can cause bloating, gas and changes in bowel habits, particularly if someone isn’t drinking enough fluid or has certain gastrointestinal conditions.
Gradual increases are usually more comfortable.
Protein needs can also differ significantly depending on age, kidney function, activity and medical conditions.
Nutrition isn’t a competition to see who can fit the largest number onto a food-tracking app.
Final word
Food trends have a funny habit of making old ideas look brand new.
Protein didn’t suddenly become important in 2026. Neither did fiber.
What’s changed is our attention.
And beneath all the protein cereal, fiber-maxxing videos and brightly labeled snack foods, grocery data reveals something surprisingly encouraging.
Americans are also buying more eggs, yogurt, sweet potatoes, edamame, chicken, beans, pears and even prunes.
Perhaps the biggest food trend of 2026 isn’t protein or fiber after all.
It may be rediscovering that some of the nutrients we’re desperately trying to add to processed foods were sitting in ordinary foods all along.
