Maintaining optimal health requires more than just regular exercise and quality sleep. Nutrition plays a pivotal role in keeping you healthy, and among the essential nutrients, dietary fiber stands out for its many benefits. Beyond aiding digestion, it influences brain health, immune function, and overall well-being. Tanner Clinic’s nutritionist Kim Folkman dives into why you need fiber and all the benefits it has for your body!
What is dietary fiber
Dietary fiber refers to the indigestible parts of plant foods that pass through our digestive system relatively intact. Everyone needs different amounts of fiber but it is generally recommended to have 25-38 grams per day.
It comes in two primary forms: soluble and insoluble. Soluble fiber dissolves in water, forming a gel-like substance that can help lower blood cholesterol and glucose levels. Insoluble fiber adds bulk to the stool and aids in moving food through the digestive tract, promoting regularity and preventing constipation.
The Gut-Brain Connection
Recent research is revealing just how important the connection is between your gut and your brain. This relationship—known as the gut-brain axis—is a two-way communication system between your digestive tract and your brain.
Fiber helps feed the good bacteria in your gut. As the bacteria break it down, they produce substances called short-chain fatty acids (or SCFAs), such as butyrate.
These SCFAs do more than just help your gut—they also have anti-inflammatory effects and may even support brain health. In fact, studies suggest they could help slow brain aging and boost cognitive function.
how it affects immune Function
A healthy gut microbiome, supported by adequate fiber intake, is key to having a good immune system. Fiber-rich diets promote the growth of beneficial bacteria, which enhance the gut barrier’s integrity and preventing harmful pathogens from entering the bloodstream. Moreover, the anti-inflammatory effects of SCFAs contribute to immune regulation, potentially reducing the risk of chronic diseases.
Cardiovascular and Metabolic Benefits
Regular consumption of dietary fiber is associated with cardiovascular benefits. Soluble fiber can help lower LDL (bad) cholesterol levels by binding to cholesterol particles in the digestive system and removing them from the body. Additionally, it aids in stabilizing blood sugar levels by slowing glucose absorption, which is particularly beneficial for individuals with diabetes or insulin resistance.
Incorporating Fiber into Your Diet
Unfortunately, many individuals fall short of the recommended daily fiber intake. Luckily, there are ways you can gradually increase your fiber consumption with some small changes to your diet!
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Choose Whole Grains: Opt for whole-grain bread, pasta, and cereals over refined grains.
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Eat a Variety of Fruits and Vegetables: Incorporate a colorful array of produce with every meal.
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Include Legumes: Beans, lentils, and chickpeas in more meals.
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Snack on Nuts and Seeds: Almonds, pistachios, chia seeds, flaxseeds, hemp hearts, etc.
As our nutritionist Kim Folkman mentions in our podcast “Is this Normal, Doc?” there are some simple and easy ways to add these in your everyday meals. Some suggestions include:
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Adding chia seeds or hemp hearts to oatmeal or yogurt
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Topping salad off with some seeds or nuts
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Swapping refined white bread for something with whole grains
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Adding legumes into your ground meat or into soups
