Weight Loss Carb Blockers

Best Carb Blockers – Top 10 Brands for 2022

ⓘ The rankings on Top10Supps are opinion only and not meant to replace professional advice or meant to be used to prevent, diagnose, or treat any disease or illness. We may receive a commission if you buy something using a link on this page.

Find out how this list was made

In order to help you find a good product, we’ve researched & compared the best carb blocking supplements on the market right now.

Top 10 Carb Blockers Compared

ⓘ If you buy something after visiting a link below, we get a commission.

1. Natrol White Kidney Bean Carb Intercept

Natrol White Kidney Bean Carb Intercept

Natrol Carb Blocker uses Phase 2, which has excellent carb blocker benefits. This product also includes chromium, a trace metal, that is necessary for the metabolism and it also uses sodium, which is a mineral that functions as an electrolyte. Overall, these three ingredients work together to create an effective carb blocking supplement.

What’s in it:

  • 1000mg Phase 2
  • 40 mcg chromium
  • 20mg sodium

Who makes it: Natrol is a vitamins, minerals, and supplements manufacturer that has been dedicated to empowering consumers to take back their health for over 35 years. Their products are produced in certified GMP facilities, and they are constantly trying to improve their formulas.

They fund research into the improvement of current products and the discovery of new health products. Their supplements are sold through health benefit categories as well, which makes it easy for their customers to find the vitamins, minerals, and supplements they need.

Where to Get It

2. NOW Foods Phase 2


This powerful carb blocking product is non-stimulant and vegetarian as well. It comes in vegetarian capsules that are easily added to your daily regimen, at 3 capsules per starchy meal. It uses a clinically tested proprietary ingredient, called Phase 2 and provides a very high dosage that is split into increments of 500mg per capsule so that the dosage can be reduced if needed.


  • All-natural
  • Non-stimulant
  • Vegetarian
  • Made in the USA

What’s in it:

  • 1,500mg Phase 2 per serving (3 capsules)

Who makes it: NOW Foods is an all-natural nutritional supplement manufacturer that is very well known in the natural supplements industry, and has been around since 1968. They have been family owned since the beginning, and maintain the stability and focus that started their journey into the natural supplements industry.

Their products are manufactured and distributed from their LEED Silver certified facilities in Bloomingdale, Illinois. They have achieved a variety of awards and recognition for excellent products and environmental awareness.

Where to Get NOW Foods Phase 2

3. Irwin Naturals Maximum Strength 3-in-1 Carb Blocker


Irwin Naturals Maximum Strength 3-in-1 Carb Blocker is a powerful carb blocker that utilizes white kidney bean extract, flaxseed oil, chromium, cinnamon, lipase, protease, and BioPerine complex. This 3-in-1 carb blocking approach is intended for those with carb-rich diets. This product is produced by a responsible and reliable manufacturer and offers an effective dose of white kidney bean extract.


  • 3-in-1 formula
  • Non-stimulant

What’s in it:

  • 1000mg common bean (white kidney bean extract)
  • 1050mg flaxseed oil
  • 125 mcg chromium
  • 100mg cinnamon
  • 20mg lipase
  • 20mg protease
  • 6mg BioPerine complex

Who makes it: Irwin Naturals is an all-natural vitamin, minerals, and supplements producer that focuses on and producing products with high bioavailability. They incorporate BioPerine into their products to ensure that their bioavailability is high and use liquid soft gels to improve their absorption.

They have undertaken an ethical responsibility of attempting to ensure that as many people as possible attain essential nutrients every day through their support of the Vitamin Angels charity campaign, which is a campaign that helps underprivileged populations attain the nutrients that they need.

Where to Buy Irwin Naturals 3-in-1 Carb Blocker

4. Source Naturals Phase 2 Carbohydrate Blocker


Phase 2 Carbohydrate Blocker is a carb blocking supplement made by a good company. Its active ingredient is Phase 2, which utilizes white kidney bean extract. It uses pure white kidney bean extract.

What’s in it:

  • 1g Phase 2 (white kidney bean extract)

Who makes it: This product is made by Source Naturals, a popular naturally supplement manufacturer that was formed in 1982. Today, Source Naturals’ products can be found on store shelves worldwide, and they boast the #1 immune support product, Wellness Formula. Beyond their ultra-popular blends, Source Naturals also produces a wide variety of useful health products and supplements.

Where to Get It

5. Pride Nutrition C-Gone


This is one of the top choices for athletes because some athletes need all the carbs they can get, but they just do not need those carbs being metabolized into body fat. It is made by a reliable manufacturer and is definitely a decent product. Though it does well for a niche market, it still has some flaws. The amino acids they include are at very low doses, and because of the fact that it is meant for the athletic community, it is not the best choice for anyone who is not a rigorous athlete.

What’s in it:

  • 500mg acetyl L-carnitine
  • 500mg L-glutamine
  • 200mg alpha-lipoic acid
  • 100mg Gymnema leaf extract
  • 15mg vanadyl sulfate

Who makes it: Pride Nutrition is an athletic supplement manufacturer and producer that uses the finest natural ingredients in their supplements. Their products are designed for athletes to enhance their performance so that they can operate at their peak performance levels. Their products are made from vitamins, minerals, fatty acids, and amino acids which are all intended to supplement your diet.

Where to Get It

6. Absolute Nutrition CBlock


Absolute Nutrition CBlock uses the proprietary carb blocking ingredient Trim Plex, which is concentrated white kidney bean extract. It also incorporates chromium, which is a trace metal. This product is produced by a reputable company and provides high-quality carb blocker benefits at an affordable price. It is high on our list because it combines the benefits of white kidney bean extract, vanadium, and chromium in a synergistically effective way.


  • Affordable
  • All-natural

What’s in it:

  • 700mg Trim Plex (as white kidney bean extract)
  • 100mg vanadium
  • 200 mcg chromium

Who makes it: Absolute Nutrition is a vitamin, supplement, and sports nutrition manufacturer that was founded in 2009. Located in Decatur, Alabama, this relatively small company is truly connected to its customers and provides excellent customer service through knowledgeable and experienced staff members that range from bodybuilders to registered nurses. Their staff members are also experienced with their products, which shows how effective they really are.

Where to Buy Absolute Nutrition CBlock

7. Genetic Solutions White Kidney Bean Extract


Genetic Solutions provides a simple white kidney bean extract that functions as a carb blocker. This highly concentrated extract is sold in liquid gel capsules for easy administration and absorption. This product contains some of the purest and most potent white kidney bean extracts for the best price, making it a strong carb blocker.


  • A highly concentrated extract of white kidney beans
  • Very affordable
  • Made in the USA
  • Non-stimulant

What’s in it:

  • 1,000mg white kidney bean extract per serving

Who makes it: Genetic Solutions is a nutritional supplement manufacturer that has been producing products that stand up to rigorous clinical tests at an affordable price for over 15 years. Their products are produced in facilities that are GMP certified and are of the highest potency and purity. Their slogan, “Everyday Supplements for Everyday People,” embodies who they are as a company and how they care about their customers.

Where to Buy Genetic Solutions WKB Extract

8. Applied Nutriceuticals Garcinia Cambogia


Applied Nutriceuticals Garcinia Cambogia uses the carb blocking benefits of garcinia cambogia to support weight loss and promote satiety. Garcinia cambogia blocks certain carbohydrates from being digested and converted into body fat. The manufacturer is also very reputable, and they provide consistently high quality and effective products. However, the dosage is on the lower end of the spectrum for garcinia cambogia.

What’s in it:

  • 500mg garcinia cambogia

Who makes it: Applied Nutriceuticals is a sports nutrition brand that was founded in 2006. They produce supplements in a GMP certified facility, and they stand by their products with a 100% satisfaction guarantee. Every one of their products is tested with a full spectrum of different bacterial tests in order to ensure their safety and efficacy.

Where to Buy Applied Nutriceuticals Garcinia Cambogia

9. Dynamic Nutrition Pure White Kidney Bean Extract


Dynamic Nutrition Pure White Kidney Bean Extract is a carb blocking supplement that utilizes all-natural white kidney bean extract to administer carb blocking benefits. These pills are vegetarian capsules and contain no milk, soy, egg, shellfish, peanuts, wheat, soy, or gluten. It is manufactured and produced by a reputable company and helps to promote weight loss. However, this product comes in a bottle of 30 capsules. There are 2 capsules per serving, which means you only get fifteen servings, which is good for about five days.

What’s in it:

  • 1000mg white kidney bean extract

Who makes it: Dynamic Nutrition is a nutritional supplement brand that is dedicated to helping you achieve the best health of your life. It is owned by business partners Stephanie and Brendon, who have 18 years of combined experience in the health and fitness industry. They are so connected to their customers that they offer a free 15-minute skype session in which you can discuss your health and achieve quality health and fitness advice from these experts.

Where to Get It

10. NOW Foods Garcinia


NOW Foods utilizes the carb blocker benefits of the all-natural ingredient garcinia cambogia. The garcinia cambogia that is is included in this product contains 50% HCA, which is the active carb blocking ingredient in garcinia cambogia. Overall it is a great vegetarian and all-natural non-stimulant supplement.

What’s in it:

  • 1000mg garcinia cambogia
  • 180mg calcium

Who makes it: NOW Foods is a natural supplement producer that creates affordable dietary supplements without unnatural or synthesized ingredients. They have a commitment to health – both health of the human body and the health of the environment. Their facilities are LEED Silver certified, and their ingredients are transparent, which means they are fully traceable all the way back to the original source.

Where to Get It

Frequently Asked Questions About Carb Blockers

What Are Carb Blocking Supplements?

Carb blocking supplements block the absorption of certain carbohydrates, which reduces your caloric intake and lowers your blood sugar. They do this by inhibiting some of the enzymes that break down certain carbohydrates and starches.

The common ingredients that are utilized in carb blockers include white kidney bean extract, garcinia cambogia, or a product called Phase 2.

The enzyme they inhibit is called amylase, which is made in the pancreas and the salivary glands. Garcinia cambogia is an exception because it inhibits the enzyme citrate lyase.

Carb blockers block between 50% to 65% of the amylase that is supposed to break down these carbs, which means that not all ingested carbohydrates are blocked from being absorbed. This is good because we do need carbs, just not as much of them sometimes.

Supplemental carb blockers are non-prescription, and you can buy them over the counter. They use the same methods as prescription carb blockers. Some prescription carb blockers that are available are used for controlling blood sugar levels in patients that have type II diabetes.

What Are the Uses & Benefits of Carb Blockers?

Carb blockers are helpful supplements to aid in weight loss. Paired with exercise and a healthy diet, carb blockers can improve your weight loss results.

This means it speeds up the process of achieving your goal weight! It is also beneficial for getting past the most difficult weight to lose. The most difficult weight to shed is often the last you have to lose.

With that said, even the most effective carb blocking supplements are no magic pills. They are no fix for an unhealthy diet, although they can help slightly. For the best results, these products should be used in combination with a balanced diet and exercise plan.

Who Can Benefit from a Carb Blocker?

Carb blocking supplements are great options for things like weight management, improving athleticism, improving blood sugar levels, and so on and so forth. Certain people who have specific health goals can really benefit from taking a carb blocker.

  • Those trying to lose weight – These are the people who can benefit the most from carb blockers. Carb blockers have numerous weight loss benefits, including blocking the absorption of carbohydrates, reducing appetite, promoting feelings of fullness, reducing caloric intake, reducing fat storage, and improving energy levels.
  • Those with high carbohydrate diets – Carb blockers have been shown to be the most beneficial to people who have high carb diets. This is because they reduce a certain percentage of the calories you absorb from carbohydrates only, and if you eat a lot of carbohydrates, carb blockers will make a bigger difference metabolically. If you have a high carbohydrate diet, carb blockers can help to fight weight gain from the carbs you consume.
  • Those who are athletes – Athletes can benefit from carb blockers in a couple of ways. Because carb blockers are effective weight loss supplements, they can help athletes reach a goal weight or body fat percentage in a shorter period of time. Some types of athletes that may gain the most benefit from these would be: bodybuilders, wrestlers, and runners, among others. They can also benefit from the increase in athletic endurance. Those who participate in long workouts or endurance-based sports can potentially improve their performance through the use of carb blockers.

Many different types of people can benefit from carb blockers. Over 50% of Americans are at or above the recommended intake of carbohydrates as of 2015. Carb blockers can help you to reduce your carbohydrate intake if you are above the limit or reduce your carbohydrate intake so that you may lose weight

How Do I Take a Carb Blocker?

Because the purpose of carb blockers is to reduce the absorption of carbs, they should be taken with a meal, ideally within 10 minutes before the food is consumed.

Some products have instructions that differ, so make sure to read the directions supplied by the product. Generally, two to three doses are taken per day. Be sure to closely follow dosage instructions, and do not take more than the recommended amount.

Are There Any Side Effects of Carb Blockers?

Carb blockers cause undigested carbohydrates to pass through the digestive tract, resulting in the fermentation of carbs. This can cause side effects such as gas, bloating, and abdominal pain.

If you have diabetes and take insulin, carb blockers may cause low blood sugar, so be sure to talk to your doctor before taking these products.

How Do I Pick a Good Carb Blocker?

A quality carb blocking supplement can be identified by analyzing a couple of characteristics. One of the most important characteristics of a good carb blocker is the use of quality and effective ingredients at an effective dose.

There are a couple of ingredients that are used most commonly in carb blockers. These include:

  • White kidney bean extract – White kidney bean extract is a substance known as phaseolamin that is found in white kidney beans and blocks amylase. By blocking alpha-amylase, fewer carbohydrate molecules are broken down into simple sugars. This means that fewer calories are absorbed and less sugar enters the bloodstream, which results in reduced body fat production. An effective dosage is between 500 and 3,000mg per meal. There are also stand-alone white kidney bean extracts you can try.
  • Garcinia cambogia – Garcinia cambogia is a tree that grows in Southeast Asia and India, and produces a fruit with a rind that contains hydroxycitric acid. Hydroxycitric acid, also known as HCA, can prevent fat storage, increase endurance, and help control appetite. HCA does this by blocking the enzyme citrate lyase, reducing appetite, promoting satiety, and speeding the metabolism. It also reduces the number of carbohydrates that are turned into body fat by disrupting this very process, which is called fatty acid biosynthesis. An effective dosage of garcinia cambogia is 500 to 1,000mg taken per meal. You can also buy a good garcinia cambogia supplement on its own if you would rather go that route.
  • Phase 2 – Phase 2 is a proprietary ingredient used in carb blockers that is all-natural. It includes non-stimulant white kidney bean extract. Phase 2 has been clinically proven to reduce the digestion and absorption of dietary starches by up to 66%. An effective dose of Phase 2 is 500 to 1,500mg per meal.

Another aspect of a good carb blocking supplement that should be analyzed is the company that produced the product. A good carb blocking supplement will be produced by a reputable company. Researching a little bit about the manufacturer can help you get a sense for their reputation. Our list of top 10 carb blocking supplements does the research for your convenience.

Lastly, evaluating the price of the supplement compared to its value is important. Get a feel for the market price ranges for the supplement and find out if it is fairly priced for the amount it offers, and the ingredients of the supplement. If a supplement is priced higher than some alternatives, it will be noted on our list.

How Did We Pick These Supplements?

Our core value at Top10Supps is transparency which is why we are open about how we pick the supplements that you just saw. You can read more about our supplement ranking methodology here.

Share this post:

About the Author