Fiber for Men: The Overlooked Nutrient for Heart, Gut and Weight

Protein gets most of the attention in men’s nutrition, but fiber may be the nutrient most men are actually missing. The Dietary Guidelines for Americans recommend about 31 to 34 grams a day for men under 50 and about 28 grams after 50. Surveys show the average American man eats closer to 18 grams.

Why fiber matters

• Heart health: soluble fiber, found in oats, beans, barley and apples, helps lower LDL cholesterol. Diets rich in fiber are linked with lower rates of heart disease.
• Blood sugar: fiber slows how quickly sugar enters the blood, which helps prevent energy crashes after meals.
• Weight and appetite: high-fiber foods are filling and take longer to eat, which makes it easier to eat sensibly.
• Digestion: insoluble fiber, from whole grains and vegetables, keeps you regular.
• Gut health: fiber feeds the healthy bacteria in your gut, which researchers are linking to many aspects of health.

Two kinds of fiber

Soluble fiber

Dissolves in water to form a gel. It helps with cholesterol and blood sugar. Good sources: oats, beans, lentils, barley, apples, citrus fruit and chia seeds.

Insoluble fiber

Adds bulk and helps food move through the gut. Good sources: whole wheat, brown rice, nuts, and the skins of fruits and vegetables.

Most plant foods contain both kinds, so eating a variety covers your needs.

The best high-fiber foods

• Black beans, red beans or lentils, 1 cup cooked: about 15 grams
• Split peas, 1 cup cooked: about 16 grams
• Avocado, 1 medium: about 10 grams
• Raspberries, 1 cup: about 8 grams
• Pear with skin, 1 medium: about 6 grams
• Oatmeal, 1 cup cooked: about 4 grams
• Breadfruit or sweet potato, 1 cup: about 4 to 6 grams
• Almonds, 1 ounce: about 3.5 grams

Many traditional Caribbean and Latin American dishes, such as rice and beans, pois, lentil soups and root vegetables, are already excellent sources of fiber.

How to add more fiber without discomfort

• Increase slowly, by about 5 grams a week, to give your gut time to adjust.
• Drink more water as you add fiber.
• Add beans to soups, stews and salads two or three times a week.
• Choose whole-grain bread, brown rice or oats more often than refined versions.
• Keep fruit on the counter and eat the skin when it is edible.
• Start the day with oatmeal or a high-fiber cereal topped with berries and seeds.

A high-fiber day, made simple

Here is one realistic day that reaches about 35 grams of fiber without unusual foods:

• Breakfast: oatmeal with a sliced pear, a spoonful of chia seeds and a few almonds, about 12 grams.
• Lunch: rice and black beans with a side salad and half an avocado, about 15 grams.
• Snack: an apple with peanut butter, about 5 grams.
• Dinner: grilled fish with roasted sweet potato and steamed broccoli, about 7 grams.

If your current intake is low, spread these changes over three or four weeks. Your energy, digestion and appetite often improve noticeably along the way.

Fiber and your other health goals

Fiber works well with the other habits that matter after 40. Combined with regular walking, it helps keep blood sugar steady after meals. Combined with healthier fats like olive oil and fish, it supports healthy cholesterol. And because high-fiber meals are filling, they make it easier to manage your waist size without feeling deprived.

Questions fréquentes

Should I take a fiber supplement?

Food is the best source because it brings vitamins, minerals and other plant compounds along with the fiber. A supplement can help some people fill a gap; talk to your doctor or pharmacist, since fiber supplements can affect how some medications are absorbed.

Why do beans give me gas?

Your gut bacteria are adjusting. Start with small portions, rinse canned beans, and increase gradually; most people adapt within a few weeks.

Sources

• Dietary Guidelines for Americans, 2020 to 2025.
• American Heart Association: Fiber and heart health.
• USDA FoodData Central: fiber content of foods.

This article is for general information and does not replace advice from your doctor.