Should you be taking a fiber supplement?

Perhaps this is a better question: Are you getting at least 28 grams of fiber per day? That’s the recommended daily value based on a 2,000-calorie diet. Turns out the average American only gets 15 or 16 grams of fiber each day. While many dietitians, including myself, encourage clients to consume fiber-rich fruits, vegetables, whole grains, and legumes to reach that number, consumers may still turn to fiber supplements. But not all supplements are created equal, or even contain the same types of fiber.

The first thing to know about fiber is that there are two different types: soluble and insoluble. Soluble fiber is the one that slows down digestion and prevents blood sugar from raising too quickly. As it passes through your intestine, it soaks up water to help keep things moving. It also binds with fatty acids and helps reduce LDL (bad) cholesterol. Like soluble fiber, insoluble fiber also aids in digestion by remaining relatively intact and pushing things through.

 Soluble fiber is the most common type found in supplements, but there are many different sources of this type of fiber. Four popular kinds include wheat dextrin, psyllium, inulin, and methycellulose.

Wheat dextrin, the form of fiber used in the supplement Benefiber, comes from wheat starch and is used to help reduce cholesterol, lower the risk of coronary heart disease, and may help lower blood sugar.

Psyllium is the form found in Metamucil and Konsyl, and is most recognized for lowering LDL (bad) cholesterol while improving HDL (good) cholesterol and preventing constipation.

Inulin, which is usually extracted from chicory root, is considered a prebiotic, as it helps increase good bacteria in the gut. However, inulin isn’t considered a “functional fiber” according the FDA, and remains the topic of a somewhat controversial debate surrounding the definition of functional fiber. Inulin can be found in Nature Made Fiber and Fiber Choice supplements.

 Methylcellulose is a synthetic soluble fiber with laxative-like effects. It’s often used to treat constipation and can be found in Citrucel supplements.

Before reaching for a fiber supplement, talk to your dietitian or your physician about your diet, medications, and overall health. While supplements might be appropriate for some, they’re certainly not a one-size-fits-all approach.   

Sidebar: Foods High in Fiber

Oatmeal: 1/2 cup cooked; 4 grams

Pears: 1 medium fruit; 5 grams fiber

Lentils: 1/2 cup; 7.8 grams fiber

Raspberries: 1 cup; 8 grams fiber

Chickpeas: 1/2 cup; 8 grams fiber

Chia Seeds: 2 tablespoons; 8.2 grams fiber

Black Beans: 1/2 cup; 8.3 grams fiber

Acorn Squash: 1 cup; 9 grams fiber

Overnight Refrigerator Oatmeal

Courtesy of

Serves 1


1/4 c. uncooked steel-cut oats

1/3 c. unsweetened almond milk

1/4 c. vanilla Greek yogurt

1 1/2 tsp. chia seeds

2 tsp. 100% pure maple syrup

1/4 c. blueberries or raspberries

2 strawberries, quartered

Cinnamon to sprinkle on top, optional


Combine oats, almond milk, yogurt, chia seeds and maple syrup in a pint jar. Cover with the lid, seal tightly and shake until well combined. Remove lid, add blueberries and strawberries and stir until thoroughly mixed. Top with cinnamon if desired. Cover with the lid and refrigerate overnight or up to 2 days. Eat chilled.

Nutrition facts per serving: 300 calories, 5g fat, 0.5g saturated fat, 95mg sodium, 54g carbohydrate, 8g fiber, 19g sugar, 12g protein

This information is not intended as medical advice. Please consult a medical professional for individual advice.

Rachelle Deutz is a registered dietitian at Hy-Vee in Marshall.