Fiber Foods – What Is Fiber & Why Should I Care?

Did you know fiber is actually a type of carbohydrate? But before you let that ‘C’ bomb make you cringe uncomfortably, you should know it doesn’t work the same way as other types of carbohydrates we eat. In this post, we’ll go through them and answer the question: What is fiber?

Fiber makes up the structural material of roots, stems, and leaves of plants. As a result, it’s basically indigestible, so it passes through our body without breaking down until the very end (in the large intestine) – but it means almost no extra calories for us. And of the few calories it does provide, this is more than offset by its ability to boost our health. (And our skills on the toilet…)

Two Types of Fiber

what is fiber

  1. Insoluble fiber tends to increase the rate food moves through our digestive system, and helps increase stool bulk. It does this by absorbing water as it moves through our digestive system (it doesn’t dissolve in water). So basically, if you’re often constipated, your diet may be severely lacking insoluble fiber! It’s found mainly in wheat bran, nuts, and the skin of many vegetables.
  2. Soluble fiber dissolves in water, to form a gel-like substance through the digestive system. This allows it to slow movement of food through digestion, as well as slow absorption of nutrients into the blood stream – particularly useful for curbing the rate sugar gets into our blood. It’s found mainly in oats, legumes, barley, apples, bananas and some vegetables.

Why Should I Care About Fiber?

Regulates Digestion (helps you poo!)

what is fiber

If you’re prone to being constipated, then it’s high time you get more insoluble fiber into your diet before you clog up completely. Nasty. (Drinking more water and physical activity helps promote bowel movements as well).

Do you know what does undigested food in stool mean? Check here

Prevents Many Diseases

what is fiber

High fibre intake has been linked with prevention of many chronic diseases and cancers for decades now, such as cardiovascular disease, colon cancer and type 2 diabetes. These trends have been spotted mainly in observational studies- that is studies that don’t prove exact cause-and-effect.

(To conduct studies that conclusively prove fiber prevents some diseases and cancers – eliminating all other outside influences – is almost impossible to do, and would require very lengthy studies.) As a result we can only say that many benefits of fiber intake are highly probable.

What we do know is it’s definitely necessary for our body to function efficiently, so I’d be having it!

Helps Curb Weight Gain

what is fiber

Review studies are all on the same page with the relationship between fiber and weight. People who consume more soluble fiber in their diet lose more weight than those who don’t.

This is because soluble fibre requires more chewing to break down, and prolongs transit time of food in the gut. So it makes our body feel fuller for longer, which means over the course of the day we eat less food in total.

“Bonus Fiber Tips”

  • We now have functional fiber – manufactured fiber that is marketed as a supplement or added to processed foods to make them “healthier”. Functional fiber don’t always provide the health benefits we expect. Fiber found in whole, natural foods is by far the best choice.
  • The current recommendations for fiber intake are 38g/day for men, and 25g/day for women. For me this is equivalent to eating 9 apples, which I don’t think I could manage daily! I recommend just eating a diet with a wide variety of fiber rich foods in order to provide you with a range of nutrients and health benefits.
  • Nutritionists must talk in detail about what we put into our bodies… and what comes out. Yay.

We hope this article helped you understand what is fiber and why it’s important for your body. If you have any question. Let us know in the comments!


Joe aims to “edutain” readers to make more informed fitness & food choices, and take back control of their lives. Especially those who have to sit all day in a 9 to 5 desk job. He believes we will forever be bombarded with new foods, supplements, and dietary propaganda - designed to exploit those who are uninformed or struggling to keep up. No one should be left behind. He’s also got a Master’s degree in Nutrition and Dietetics, which he hopes gives him some cred. Oh and he always talks about himself in the third person…

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