Why Fiber Matters for Digestion and Health: Types of Fiber and How to Get Enough

Fiber is one of those nutrients we hear about often, but many people still don’t get enough of it. Even though fiber is naturally present in many everyday foods, modern eating habits often include more processed products and fewer whole plant foods. As a result, fiber intake tends to be lower than what our bodies actually need.

Understanding what fiber is and why it matters can make a big difference. When we include enough fiber in our meals, digestion works better, energy levels are more stable, and overall health tends to improve.

What Is Fiber and Types of Fiber

Fiber is a type of carbohydrate found in plant foods that the body cannot fully digest. Instead of being broken down like other nutrients, fiber moves through the digestive system and helps support healthy digestion.

There are two main types of fiber. Soluble fiber dissolves in water and forms a gel-like texture that can help regulate blood sugar and cholesterol levels.

Insoluble fiber does not dissolve in water and helps move food through the digestive system, supporting regular bowel movements. Most plant foods naturally contain a combination of both types.

Fiber and Water: Why They Work Together

Fiber and hydration go hand in hand. When fiber absorbs water, it expands and forms a softer bulk that helps food move through the digestive tract more easily.

If someone increases fiber intake but does not drink enough water, digestion can become slower and uncomfortable. For this reason, increasing fiber should always be accompanied by adequate daily water intake.

How Much Fiber Do You Need Per Day?

Most health guidelines recommend that adults aim for approximately:

25–30 grams of fiber per day

In my work with clients, I often notice that fiber intake is much lower than people think. Many people focus on calories or protein, but fiber is often overlooked.

High Fiber Foods to Include in Your Diet

The best way to increase fiber intake is by eating a variety of whole plant foods.

Some of the best high-fiber foods include:

• vegetables

• berries

• beans and lentils

• chickpeas

• nuts and seeds

• chia seeds

• flaxseeds

• gluten-free whole grains such as quinoa and buckwheat

Adding more of these foods to everyday meals can significantly improve daily fiber intake.

What Happens When You Don’t Eat Enough Fiber?

When the diet is low in fiber, digestion often slows down. This can lead to problems such as constipation, irregular bowel movements, and feeling bloated or uncomfortable after eating. Low fiber intake can also make blood sugar levels less stable and may increase hunger and cravings throughout the day. Over time, not getting enough fiber can affect gut health and increase the risk of certain health problems.

Flaxseed: A Powerful Source of Fiber

One of the richest natural sources of fiber is flaxseed.

Just ¼ cup of ground flaxseed contains about 11–12 grams of fiber, which makes it a very concentrated source.

Flaxseed also provides:

• omega-3 fatty acids

• plant compounds called lignans with antioxidant properties

• both soluble and insoluble fiber

When mixed with liquid foods, ground flaxseed forms a soft gel that can support digestion.

For best absorption, flaxseed is usually recommended ground rather than whole.

Fiber also feeds beneficial bacteria in the gut. A healthy gut microbiome plays an important role in digestion, immunity, and metabolism.

If you’re interested in learning more about digestion and gut health, you can also read my article about inflammation and how nutrition supports the body.https://www.bettereating.ca/post/what-is-inflammation

If you feel that your diet may benefit from a more fiber-rich approach, or you’d like to improve your fiber intake, you can book a free discovery call with me. Together we can review your current diet and explore simple changes that support better digestion and overall health.