25 grams a day for women. 38 grams for men. Most Americans eat about 16, and only about 5% of the population hits the target.

The gap matters because fiber feeds the bacteria in your gut. Those bacteria turn it into compounds that fuel the cells lining your colon, keep the gut wall strong, and help regulate your immune system. When you don't eat enough fiber, your gut bacteria don't have enough to work with.

Closing the gap doesn't require a meal plan or a supplement. Most high-fiber foods are things you'd buy anyway. Beans, berries, oats, whole wheat bread, nuts. A few swaps in your normal meals usually get you there.

How much fiber do you need?

The 2020-2025 Dietary Guidelines for Americans recommend 25 grams a day for women and 38 grams for men under 50. After 50 the targets drop a bit: 21 grams for women, 30 grams for men. The underlying rule is 14 grams per 1,000 calories.

If you eat a typical Western diet, you're probably somewhere between 14 and 16 grams a day. Hitting 25 to 38 feels like a big jump on paper but adds up quickly with a few changes.

What 25 grams of fiber looks like in a day

Breakfast: Oatmeal made with a quarter cup of steel cut oats, topped with a cup of raspberries and a tablespoon of chia seeds. About 18 grams of fiber before you've left the house.

Lunch: A sandwich on whole wheat bread with whatever filling you like. Two slices of whole wheat bread add about 6 grams. Add baby carrots and hummus on the side for another 3 to 4.

Dinner: Whole wheat pasta with broccoli. The pasta adds about 6 grams, the broccoli about 5.

Snack: A handful of almonds. About 3.5 grams.

Total: roughly 40 grams. Above the target for both men and women, with nothing unusual on the list.

You don't need to eat exactly this. The point is that fiber adds up fast once you know where it comes from.

High-fiber foods at Safeway

Beans and lentils

Signature SELECT Beans Black - 15 Oz

The highest-fiber items in the store. Half a cup of canned lentils has 8 grams. Half a cup of black beans, kidney beans, or pinto beans has 6 to 8 grams.

Canned beans are ready to use. Open the can, rinse them (cuts the sodium by about 40%), and add them to whatever you're making. Rice bowls, tacos, soups, salads, pasta. Dried beans cost less per serving but take more time.

Berries

Raspberries Prepacked - 6 Oz

Raspberries and blackberries have 8 grams of fiber per cup. More than a slice of whole wheat bread, more than a banana, more than most vegetables. Blueberries have about 4 grams per cup. Strawberries about 3.

Fresh or frozen, the fiber is the same. Frozen berries are picked at peak ripeness and are available year-round.

Oats and seeds

Bob's Red Mill Steel Cut Oats - 24 Oz

A quarter cup of steel cut oats (dry) has about 5 grams. Rolled oats have about 4 grams per half cup. Both contain a type of soluble fiber that's especially good at feeding beneficial gut bacteria.

O Organics Chia Seeds - 16 Oz

Chia seeds are the highest-fiber topping you can add to anything. Two tablespoons have about 10 grams. They absorb liquid and form a gel, which is why they work well stirred into yogurt or oatmeal.

Ground flaxseed has about 4 grams per two tablespoons. Buy it ground or grind it yourself. Whole flax seeds pass through without being broken down.

Bread and wraps

A slice of white bread has about 1 gram of fiber. A slice of whole wheat bread has about 3. A whole wheat sandwich gives you about 6 grams; one on white has about 2.

Check the ingredient list. "Wheat flour" is not whole wheat. Look for "whole wheat flour" as the first ingredient.

Some high-fiber wraps and tortillas at Safeway go much higher, with 12 to 30 grams of fiber per wrap. That fiber comes partly from added ingredients like modified wheat starch and resistant starch, not just the grain itself. It still counts toward your daily intake, but whole-food fiber comes with more nutrients.

Whole wheat pasta and grains

Barilla Whole Grain Spaghetti Pasta - 16 Oz

Whole wheat pasta has about 6 grams of fiber per serving. Regular white pasta has about 2. Triple the fiber for the same meal.

Barley has about 6 grams per cup when cooked, mostly soluble fiber. Quinoa has about 5 grams and is one of the few grains with complete protein. Brown rice has about 3.5 grams, up from 0.6 in white rice.

Vegetables and snacks

Broccoli has about 5 grams per cup cooked. Green peas have 4.5 grams per half cup. Sweet potatoes have about 4 grams if you eat the skin. Cooked vegetables give you more fiber per serving than raw because they shrink down, so you eat more of the original food.

For snacking, popcorn is a whole grain with about 3.5 grams per three cups. Almonds have 3.5 grams per ounce. Dried figs have about 4 grams per serving.

Small swaps that add up

A few changes can add 10 to 15 grams a day without overhauling anything.

The easiest: switch white bread, rice, or pasta for whole wheat or brown versions. Each swap adds 3 to 4 grams per serving. A whole wheat sandwich at lunch and whole wheat pasta at dinner add about 8 grams over the white versions.

Adding half a cup of beans to something you already make (rice bowl, soup, tacos, salad) adds 7 grams in one move. A tablespoon of chia seeds stirred into yogurt or oatmeal adds 5 grams you won't even taste.

Fruit choice matters too. A cup of raspberries has 8 grams. An apple has about 4. A cup of grapes has about 2.

Pick two or three of these that fit your routine. That's usually enough to close the gap.

Soluble vs insoluble fiber

Most fiber falls into one of two categories.

Soluble fiber dissolves in water and forms a gel. It slows digestion, helps lower cholesterol, helps regulate blood sugar, and feeds your gut bacteria. Oats, beans, barley, chia seeds, psyllium, apples, and most fruits are high in soluble fiber.

Insoluble fiber doesn't dissolve. It adds bulk and helps food move through your digestive system. Wheat bran, whole grains, vegetable skins, and nuts are high in insoluble fiber.

Most high-fiber foods contain both. You don't need to track the ratio. Eating a variety covers it. The distinction only matters for specific goals:

• For lowering cholesterol or blood sugar: soluble fiber. Oats, beans, and psyllium have the most clinical research behind them.

• For regularity: both help, in different ways.

• For feeding gut bacteria: soluble fiber. Your bacteria ferment it into compounds that fuel the cells lining your colon.

Fiber for constipation

Both fiber types help here. The practical move is to add a fiber source you can eat consistently, plus enough water. Beans, oats, whole wheat, and chia are easy daily additions. Two tablespoons of chia seeds add 10 grams to whatever you're eating.

For something faster, prune juice and whole prunes both contain soluble fiber plus sorbitol, a sugar alcohol with its own laxative effect. The combination is why prunes work as quickly as they do. See our prune juice article for timing and dosage.

If food alone isn't getting you there, a psyllium supplement is the option with the most research behind it for regularity.

How to add fiber without the gas

This is the part that stops people. You read that fiber is good, buy a bag of lentils and a box of Fiber One, eat 30 grams on day one after months of eating 12, and spend the next two days bloated and miserable. Then you decide fiber doesn't agree with you.

That's not fiber disagreeing with you. That's too much, too fast.

Your gut bacteria need time to adjust to more fiber. When you suddenly flood them with food they haven't had much of, they produce extra gas as they ramp up. This is temporary. It usually settles in two to three weeks of consistent eating.

Add about 5 grams per week. If you're at 15 grams a day, aim for 20 the first week, 25 the second, and so on. Your gut bacteria adapt along the way.

Drink more water. Fiber absorbs water. Without enough fluid, it can slow things down instead of speeding them up. There's no magic number, but if you're adding fiber and feeling clogged, drink more.

Cooked over raw. If raw vegetables cause you trouble, cook them. Cooking breaks down some of the cell walls, making the fiber easier for your gut to handle. Steamed broccoli is gentler than raw broccoli.

Spread it across meals. Three meals with 8 to 10 grams each are easier on your gut than one meal with 25 grams. Loading all your fiber into one sitting gives your bacteria more to ferment at once, which means more gas at once.

Beans are worth the effort. They cause more gas than most foods because they contain certain carbohydrates your body can't break down on its own. Your gut bacteria handle them, and produce gas doing it. Soaking dried beans overnight and cooking in fresh water reduces this. Canned beans cause less gas than dried because the canning process breaks down some of those carbohydrates. The gas decreases as your gut bacteria adjust over a few weeks of regular eating.

Fiber supplements at Safeway

Metamucil 4 in 1 Fiber Supplement Powder Sugar-Free Orange - 72 tsp

Supplements can help fill the gap while you build more fiber into your meals. They're not a replacement for high-fiber foods, which deliver vitamins, minerals, and different types of fiber that no single supplement provides. But if you're only getting 10 to 15 grams a day from food, a supplement can bridge the difference.

Safeway carries three main types:

Psyllium husk (Metamucil and store-brand equivalents) is a soluble fiber that forms a gel in water. It has the most clinical research behind it for cholesterol, blood sugar, and regularity. Start with half a dose for the first week. It thickens fast, so drink it quickly after mixing.

Wheat dextrin (Benefiber and store-brand equivalents) dissolves clear and is tasteless. You can mix it into coffee, soup, or water and not notice it. About 3 grams per serving. It has less research than psyllium for cholesterol but works as a prebiotic.

Methylcellulose (Citrucel) causes less gas than psyllium because your gut bacteria don't ferment it as much. It delivers less fiber per dose, but it's a good option if other supplements bother you.

All three are also available as capsules, chewables, or on-the-go packets.