If you’ve ever been in my office, there’s a good chance I’ve told you this: you probably need more fiber. Most of us do. Fiber isn’t just about keeping your bowels happy (though that’s a big plus). It also helps regulate cholesterol, balance blood sugar, and can even support weight loss. The problem is that most Americans fall way short.
Here’s a simple way to check: jot down what you eat in a day and add up the fiber. I encourage patients to shoot for 15 grams as a starter goal, with a stretch target of 35 grams. For reference, women should be aiming for at least 28 grams a day, and men around 38. Yet fewer than 1 in 20 Americans get there.
Two kinds of fiber – and why they matter
Fiber comes in two main forms: soluble and insoluble. You need both, and they work in different ways.
Soluble fiber: the gel-former
Soluble fiber dissolves in water and turns into a gel. That gel helps you feel full longer, smooths out blood sugar spikes after meals, and can even lower cholesterol and triglycerides. You’ll find it in oats, barley, beans, apples, pears, and citrus fruits.
One important detail: not every soluble fiber lowers cholesterol. Only certain ones, like psyllium, oat beta-glucan, and raw guar gum, do this consistently. Others still have benefits, just not necessarily for cholesterol.
Insoluble fiber: the roughage
Insoluble fiber doesn’t dissolve in water. Instead, it adds bulk and gently stimulates your intestines to release water and mucus, which softens stools and keeps things moving. Think wheat bran, corn bran, whole grains, and lots of veggies.
There’s a common myth that insoluble fiber acts like a sponge, soaking up water. Not quite. It’s really the coarse, intact bits, like wheat bran flakes or whole psyllium husk, that do the work of gently scrubbing the intestines. Finely ground versions may actually have the opposite effect and make constipation worse.
My favorite: psyllium husks
If you’ve ever talked fiber with me, you know I love psyllium. About 70% of it is soluble fiber, and unlike most soluble fibers, it doesn’t ferment much in the gut. That means it holds onto its gel structure, carrying water all the way through the bowel. Research shows it improves stool frequency, softens stools, and even works better than some stool softeners for constipation.
The downside? It’s gritty like cornmeal and tastes like cardboard. My tip: stir the loose powder into water with a splash of orange juice or lemon, then drink it quickly before it thickens too much. Some people even like the slightly thick texture and sip it slowly so you can experiment and see what works for you.
Other good options: chia and flax
Seeds like chia and flax give you a mix of soluble and insoluble fiber. Chia, for example, forms a gel in liquid and has been linked to modest improvements in blood pressure, waist size, and inflammation. The research is still new, but they’re easy to sprinkle into smoothies, oatmeal, or baked goods.
Everyday ways to get more fiber
- Eat at least three servings of vegetables and two servings of fruit each day.
- Choose whole grains (like oats, quinoa, barley, or brown rice) instead of white bread, pasta, or rice.
- Add beans, lentils, or chickpeas to your meals most days.
- Mix oat bran, flaxseeds, or chia into yogurt, cereal, or baked goods.
- Snack on popcorn, fruit, or veggies instead of chips or crackers.
One important tip: increase fiber slowly and drink plenty of water. Otherwise, your digestive system may let you know it’s not happy.
The bottom line
Fiber is one of the simplest, most powerful things you can add to your daily routine for better health. Whether you get it from fruits, veggies, beans, grains, or supplements like psyllium, making fiber a daily habit can benefit digestion, heart health, and more.
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Dr. Jennifer Potter, ND
Naturopathic Doctor San Jose
408-356-1364
Dr. Jennifer Potter, ND provides natural healthcare solutions for families and individuals, focusing on perimenopause/menopause, autoimmune conditions, fatigue, and immune support. She is deeply committed to her patient’s well being, prioritizes patient education and combines natural and conventional therapies to deliver personalized care. Outside of her practice, she enjoys time with her two kids, reading fiction, and crocheting.
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