Bowls of High Fiber Foods

Best Fiber Supplement For Keto

If you are in a hurry and just want to find out what the best fiber supplement for keto is then I’d recommend NOW Supplements, Psyllium Husk Powder as the best one.

I love the keto diet, but the biggest problem is that it’s tricky to get enough fiber when you cut out all of those carbs and grains.

It’s also frustrating trying to make sense out of your fiber options on keto. As you realize, a lot of sources of fiber are high in carbs. Finding the best fiber supplement for keto is indeed challenging.

If you can relate to this stressful situation, then relax! We’re about to look at the five best fiber supplements perfect for all keto dieters.

Table of Contents

Everything You Need to Know About Fiber Supplements for Keto

Most keto diet plans limit you to around 20 carbs per day.

If you want to stay in ketosis, keto dieters may only consume up to 20 grams of carbs daily.

When you consider the math, it’s challenging to get enough fiber on such a limited supply of carbs. (Most grains and fruits, while excellent sources of fiber, are also very high in carbs/sugar).

What Are the Advantages of Fiber Supplements for Keto?

There is an abundance of benefits of a high fiber diet.

A list of benefits includes the following:

  • Healthy bowel movements
  • Promotes bowel health
  • Blood sugar control
  • Helps achieve a healthy weight
  • Helps you to live longer
Benefits of Dietary Fiber

Fiber supplements (psyllium) can help lower LDL cholesterol.

Overall, the benefits of fiber are tremendous. If you want to stay healthy and avoid constipation, then fiber is a must!

Things to Look for in Your Keto Fiber Supplement

The number one thing to look out for is the amount of carbs/sugar in the supplement.

If you wish to stay in ketosis, your fiber supplement mustn’t put you over your carb limit.

Also, conduct your research. Read different reviews so you can get an indication of how the supplement works for other users.

One other thing to remember is that a fiber supplement may interfere with certain types of medications. You should take your medication several hours before or after your fiber supplement. Be safe and consult your doctor if you take medication.

What’s the Best Way to Use Your Keto Fiber Supplement?

Getting enough fiber on a keto diet is challenging, make no mistake about it. You need all the help you can get.

You should try your best to make your fiber supplement a part of your routine.

Always pay attention to your body! Monitor how you feel the days and weeks after starting your supplement.

Also, try to supplement your keto diet naturally. The following high fiber foods are relatively low carb:

  • Leafy greens
  • Broccoli
  • Cabbage
  • Nuts
  • Seeds
  • Spinach
  • Avocado
  • Cauliflower

The Five Best Fiber Supplements for Keto Diet

Let’s look at five of the best fiber supplements perfect for the keto diet.

NOW Supplements, Psyllium Husk Powder

If you want an ingenious fiber supplement for a low carb lifestyle, then psyllium husk powders are nearly perfect. Not only is psyllium husk great for constipation, but it’s also keto-friendly because it’s extremely low carb.

Another thing you’ll love about psyllium husk powder is that it’s 100% natural. If you want to enjoy a healthy fiber supplement without additives or sugar, then psyllium husk is probably one of your best options.

Psyllium husk powder is also perfect for all kinds of different low carb recipes. Or, you can also blend the powder into your favorite low-carb shake, smoothie, or drink. Ensure to mix the powder aggressively to you minimize lumpiness.


  • 100% natural
  • 100% Non-GMO
  • Great constipation relief
  • Affordably priced
  • Is hardy and provides a “full” feeling
  • Great for various low-carb baking recipes
  • Contains 6 grams soluble fiber per serving
  • Contains 1 gram insoluble fiber per serving
  • No added sugar


  • Not the best tasting on its own
  • May cause gas

Viva Naturals – Organic Ground Flax Seed

Flax seeds are the natural allies of all keto dieters everywhere! There are a few reasons why you might love flax seeds.

First of all, flax seeds are delicious, and you can easily chuck them into your favorite soups or salads. You can also sprinkle them over your favorite recipes, or blend them with almond milk to make a deliciously satisfying low-carb smoothie.

Flax seeds pack quite the nutrient and fiber punch. Each serving contains 3 grams of fiber and 3 grams of protein. You also get 6% of iron and 4% of your daily required calcium. These little flax seeds are delicious and nutritious.


  • Excellent source of fiber
  • Non-GMO
  • Vegan-friendly
  • Gluten-free
  • 100% organic
  • Very affordable
  • Easy to mix in your favorite drinks or keto-friendly shakes
  • Contains 3 grams of protein per serving
  • Excellent source of insoluble and soluble fiber
  • Very easy to add to sweet or savory snacks


  • Spoils easily if unrefrigerated
  • Must freeze to store long-term

Ancient Nutrition KetoFIBER Powder

When I first experimented with the keto diet, I was overwhelmed with all of the fiber supplement choices!

Unfortunately, there’s a bit of a problem. Because once you start your research, you’ll find that a lot of traditional fiber supplements are high in sugar and carbs.

If you want a fantastic fiber supplement with only two net carbs, then this KetoFIBER powder is perfect.

The powder itself tastes good and contains a healthy combination of flax seeds, chia, fermented herbs, and other natural ingredients.

You can easily mix the powder into your favorite keto-friendly smoothie, recipe, or drink. One critical tip is to ensure that you mix this powder aggressively into your drink so you can minimize lumpiness.

Or, try blending a serving with your favorite almond milk for a delicious, nutrient-packed treat.


  • Formulated specifically for the keto diet
  • Contains an organic combination of flax, chia, and cinnamon with fermented herbs
  • Provides 5 grams of fiber per serving
  • Contains 4 grams of protein per serving
  • 100% 30-day money-back guarantee by KetoFIBER
  • All-natural ingredients
  • Non-GMO
  • Easy to mix in your favorite drink


  • The texture is a tad lumpy
  • More expensive than other options

Micro Ingredients Organic Inulin FOS Powder

If you’re already cash-strapped from your ketogenic diet, then you need to check out this organic inulin from Micro Ingredients.

This inulin powder is easily one of the most budget-friendly fiber supplement options. Don’t worry because you’re not sacrificing quality.

Each container is USDA organic. The product is 100% vegan and includes no additives, sugars, or soy products. If you want to increase your fiber efficiently, then you can quickly mix this organic inulin into your favorite drink for a quick fiber boost.

The inulin in this fiber supplement comes from Jerusalem Artichokes. The powder itself tastes a little sweet. The package also contains a measuring spoon, so you never have to guess the perfect portion size.

Each serving of this organic inulin powder boasts 2.3 grams of fiber. Every bag contains a whopping 384.6 servings, so the quantity is generous and packs massive value.


  • Very inexpensive
  • Easily mixes into your favorite keto-friendly smoothie or drink.
  • Contains 2.3 grams of fiber per serving
  • Comes with a handy measuring cup
  • USDA Organic
  • Non-GMO
  • Vegan-friendly
  • Gluten-free
  • Kosher
  • No preservatives
  • Soy and additive-free


  • A small measuring cup makes it tempting to add more than the recommended dosage
  • May cause gas or bloating

Benefiber Daily Prebiotic Dietary Fiber Supplement Powder

If you want a traditional fiber supplement from a known brand, then this Benefiber supplement is worth consideration.

Each serving contains 3 grams of soluble fiber, which is an excellent supplement to your low carb diet.

If you’re looking for a fiber supplement that readily mixes with liquid, then Benefiber is an attractive choice.

Another significant benefit that this powder boasts is that it’s tasteless. So if you can’t stand the taste of other fiber supplements, then this is perfect.

The powder itself absorbs clearly and quickly in liquid, and you can even add it to recipes if you wish.

If you’re worried about additives, then this supplement checks all of your marks. The powder is 100% natural, gluten-free, and sugar-free so it won’t interfere with your low carb lifestyle.


  • 100% tasteless so you can easily add it to your favorite low-carb smoothies, drinks, or recipes
  • Sugar-free
  • Gluten-free
  • 100% natural
  • Is an excellent option for low-carb baking or cooking
  • Packs a hefty 3 grams of fiber per serving
  • Grit-free and dissolves easily in liquid


  • Not the most affordable option
  • Benefiber recommends not mixing this powder with carbonated beverages

Top Pick: Fiber Supplement for Keto Diet

One of the biggest downers in the world of ketogenic dieting is the lack of fiber.

Saying goodbye to fiber-rich foods such as whole grains and fruits can be a tough call.

Luckily, there are endless fiber supplement options that can help you to live a low carb lifestyle without sacrificing your health.

Overall, Psyllium Husk Powder by NOW Supplements is probably one of my favorite fiber supplement choices.

Why I love psyllium husk powder:

  • Psyllium husk is 100% natural
  • It’s effortless to integrate with low-carb recipes
  • Offers incredible constipation relief and regularity
  • Is an excellent source of fiber and boasts 7 grams of fiber per serving
  • Is easy to afford

Hopefully, after reading this guide, you have a much easier time succeeding with your keto diet and overcoming a lack of fiber.

Also, remember that your results may vary! All of the fiber supplements on this list have their unique benefits.

Try to decide which one seems the best for your lifestyle. Most importantly, see how the fiber supplement makes you feel!