Dietary Fiber: Reaching 28 g a Day

Fiber is one of the nutrients Americans most often fall short on, and the Nutrition Facts label makes it easy to spot foods that help close the gap. This guide explains the 28 g Daily Value, how the FDA decides what counts as fiber on the label, and practical ways to eat more without upsetting your stomach.

Why fiber matters

Dietary fiber is the part of plant foods that your body can't fully digest. Instead of being absorbed in the small intestine, it moves through to the large intestine, where some types are fermented by gut bacteria. According to the Dietary Guidelines for Americans and the NIH, diets rich in fiber are linked to:

• Better digestive health, including more regular bowel movements.
• Lower LDL cholesterol, especially from soluble fibers like those in oats, barley, and beans.
• Steadier blood sugar after meals.
• Feeling full longer, which can help with managing how much you eat.
• A lower risk of heart disease, type 2 diabetes, and colorectal cancer in large observational studies.

The FDA allows health claims on qualifying foods linking soluble fiber from sources like oats and psyllium to a reduced risk of heart disease, as part of a diet low in saturated fat and cholesterol.

How much you need

The FDA's Daily Value for dietary fiber is 28 g per day, based on a 2,000-calorie diet. It comes from the recommendation of 14 g of fiber for every 1,000 calories, which the Dietary Guidelines also use. Needs vary with calorie intake, so the guidelines' targets range from around 22 g a day for some women to about 34 g for some men.

Most people don't come close. According to the 2020–2025 edition of the Dietary Guidelines, more than 90% of women and 97% of men in the US don't meet recommended fiber intakes. The current 2025–2030 edition still lists fiber as a nutrient Americans underconsume. Typical intakes are roughly half of what's recommended, mostly because Americans eat fewer vegetables, fruits, whole grains, and beans than advised.

What counts as fiber on the label

Under the updated Nutrition Facts rules finalized in 2016, the FDA defined dietary fiber in two parts:

• Naturally occurring fibers that are intrinsic and intact in plants, like the fiber in whole grains, beans, fruits, and vegetables. These always count.
• Isolated or synthetic fibers added to foods, which count only if the FDA has determined they have a beneficial effect on human health, such as lowering blood sugar or cholesterol, or improving bowel function.

The FDA's list of added fibers that meet the definition includes beta-glucan soluble fiber, psyllium husk, cellulose, guar gum, pectin, locust bean gum, and hydroxypropylmethylcellulose, and the agency has since added others such as inulin and inulin-type fructans, polydextrose, resistant maltodextrin, and certain resistant starches. An added fiber that isn't on the list can't be counted in the dietary fiber line.

A few things to keep in mind when reading labels:

• Maltodextrin and resistant maltodextrin are different. Regular maltodextrin is a quickly digested starch; only the resistant form counts as fiber.
• Soluble and insoluble fiber may be listed separately, but this is voluntary.
• Fiber claims have definitions. Under FDA rules, "good source of fiber" means 10–19% DV per serving (about 2.8 to 5.3 g), and "high fiber" or "excellent source" means 20% DV or more (at least 5.6 g).
• "Made with whole grains" doesn't guarantee much fiber. Check the grams on the panel and whether a whole grain is the first ingredient.

Practical ways to eat more fiber

Easy swaps

• Choose whole-grain bread, pasta, and brown rice over refined versions.
• Add beans, lentils, or chickpeas to soups, salads, and pasta; half a cup of cooked beans provides roughly 6 to 8 g of fiber, according to USDA data.
• Eat whole fruit instead of juice, and keep the skin on apples and pears.
• Start the day with oatmeal or a whole-grain cereal with at least 5 g of fiber per serving.
• Snack on nuts, seeds, popcorn, or raw vegetables.

What a 28 g day can look like

You don't need special products to reach the Daily Value. Using typical values from USDA FoodData Central, a day like this gets you close:

• A cup of cooked oatmeal: about 4 g
• A medium apple with the skin: about 4 g
• Two slices of whole-wheat bread: about 4 to 6 g
• Half a cup of black beans: about 7 g
• A cup of cooked broccoli: about 5 g
• A small handful (1 ounce) of almonds: about 3 to 4 g

Actual amounts vary by brand and preparation, so check the label on packaged items.

Go slowly

Adding a lot of fiber at once can cause gas, bloating, and cramps. Increase your intake gradually over a few weeks and drink plenty of fluids, which help fiber move through the digestive tract. Added fibers like inulin can be more likely to cause gas in sensitive people, so pay attention to how your body responds.

Food first

Fiber-fortified bars and drinks can help, but whole plant foods provide fiber along with vitamins, minerals, and other beneficial compounds. The Dietary Guidelines recommend getting nutrients mainly from foods.

How to use this on myfoodfact.com

• Find the most fiber-rich products per 100 g with our products ranked by fiber.
• See which products add a common prebiotic fiber on our inulin ingredient page, and compare it with maltodextrin.
• Use the 5/20 rule from our guide to %DV explained to spot high-fiber foods at a glance.

The bottom line

The 28 g Daily Value is a useful target, and most Americans have plenty of room to move toward it. Look for 20% DV or more on the fiber line, favor whole grains, beans, fruits, and vegetables, and add fiber gradually. Added fibers on the FDA's approved list do count on the label, but whole foods remain the most reliable way to get there.

This guide is for general information and is not medical advice. People with digestive conditions or on certain medications should check with a doctor or registered dietitian before making large changes to their fiber intake.