Fiber: The Underrated Nutrient for Fullness and Health

Protein gets the attention, but fiber quietly does a lot of work. It helps you feel full, supports digestion and a healthy gut, and is linked to lower risk of heart disease and type 2 diabetes. Yet most adults in Western countries eat well below the recommended amount.

How Much Do You Need?

Common recommendations are roughly 25 to 38 grams a day for adults, depending on the country, age and sex. Many people currently eat around 15 to 20 grams. You do not need to count it precisely — just aim to include fiber-rich foods at most meals.

Why It Helps With Appetite

Fiber adds bulk to meals and slows digestion. High-fiber foods like vegetables, legumes, fruit and whole grains tend to be filling for relatively few calories. That makes them especially useful when you are eating in a deficit and want meals that keep hunger away.

Easy Sources

• Legumes: lentils, chickpeas and beans — among the richest sources, plus they bring protein.
• Whole grains: oats, whole-grain bread, brown rice, barley.
• Vegetables: especially broccoli, carrots, Brussels sprouts, peas and leafy greens.
• Fruit: berries, pears, apples (with the skin), bananas.
• Nuts and seeds: chia seeds, almonds, flaxseeds.

Simple Upgrades

• Add a handful of berries or a spoon of chia to breakfast.
• Swap white bread or rice for whole-grain versions some of the time.
• Add a can of beans or lentils to soups, stews and pasta sauces.
• Make half your plate vegetables at lunch and dinner.

Increase Gradually

Jumping from very little fiber to a lot can cause bloating and gas. Add it over a couple of weeks and drink enough water, as fiber works best with fluid.