Kath Ross

By Kath Ross, PhD.

Since carb blockers hit the scene in the late ’90s their popularity has only continued to grow, with them now being one of the most desired and effective weight loss supplements out there. Carb blockers proved to be a smash-hit with dieters all over the world because they allow those following a low-calorie diet plan to eating carb-heavy foods.

Unfortunately not all carb blocker pills are created equal – as more and more companies begin to produce subpar versions to cash in on the hype, consumers face a difficult task of finding a carb blocker that actually works.

With so many products to choose from, it’s more important than ever to do your research. We have produced this top 10 best carb blockers list to help guide you towards a good purchase. The list contains nothing but highly-effective carb blocker pills that have met our rigorous approval process:

1. Refuze

refuze carb blocker product image
We Rated It:

Refuze is a max strength carbohydrate blocker produced by Astral Nutrition. We have put this product in the first position of our best carb blocker pills list because we believe that this is hands down the best product out there – Refuze uses clinically-proven ingredients, has further fat burning effects and can even help suppress your appetite as well.

As you’d expect from a top rated carb blocker, the main function of Refuze is to block carbohydrate absorption, thus causing your body to absorb significantly less calories from the carbohydrates in your food. This carb-inhibiting effect is cause by a potent complex of White Kidney Bean Extract, Chromium, Vitamin C, Natural Caffeine and Guarana

In addition to the carb blocking effects, Refuze also doubles up as a highly effective short-term appetite suppressant – a very useful effect for those who will be sticking to a low-calorie diet plan while using the product.

Finally, Refuze contains metabolism-boosting ingredients that can help trigger your body into burning calories at a faster rate than normal, further contributing towards fast and healthy weight loss.

The bottom line: to us, this is the best carb blocking pill that money can buy; taking Refuze prior to your meals can help you significantly lower your daily caloric intake with minimal effort, it also can help reduce your hunger cravings and will even give your metabolism a boost too.

2. Meratol

meratol product image
We Rated It:

Meratol is a carbohydrate inhibitor made by Bauer Nutrition. We have placed Meratol in position #2 of our best carb blockers list because this is another multi-action carbohydrate inhibitor that also comes with metabolism-boosting and appetite-suppressing effects.

Like all the best carb blockers on this list, Meratol primarily works by reducing the amount of carbohydrates you can absorb from your meals – by taking servings of Meratol before each meal, you will be blocking your carbohydrate absorption and lowering your daily calorie intake.

As well as the carb blocking effects, Bauer Nutrition have loaded this product with metabolism boosting compounds like Caffeine Anhydrous and Ascophylum Nodosum – both ingredients have certain studies showing they can help stimulate the central nervous system, thus triggering a faster rate of calorie expenditure.

And last but by no means least, Meratol is also a nice little short-term appetite suppressant too – the stimulant content of this product has been shown in some studies to help curb hunger pangs.

The bottom line: Meratol is another fine example of a carb blocker done right. It contains potent ingredients that are backed by research, it’s priced appropriately and even comes with a 60-day money-back guarantee to protect those who aren’t satisfied.

3. Pre-Meal Carb Blocker

meratol product image
We Rated It:

Applied Nutrition’s Pre-meal carb blocker is one of the most well respected products on the market.

We have put this product in position #3 because it’s been around since the beginning and uses a simple but highly effective formula to help consumers reduce their carbohydrate calorie intake.

As the name suggests, you’re meant to take this prior to your meals. Applied Nutrition state that this product is “designed to help combat carb calories from high-carb meals such as pasta, pizza and bread” – after some further research into the formula, we believe this product will indeed make good on its claims to inhibit carbohydrate absorption.

This is a 1-ingredient product – at its core is a potent dose of White Kidney Bean Extract (1000mg to be exact); this ingredient has been shown to inhibit amylase, the enzyme inside your stomach responsible for starch-digestion.

The bottom line: this is a simple but effective product that just simply works. It’s easy to acquire, uses a potent formula and doesn’t cost the earth.

4. Carb Intercept

Carb Intercept Product Image
We Rated It:

Carb Intercept by Natrol is a powerful weight loss product with an excellent nutritional profile.

This product finds itself in position #4 of our list because, when taken directly before starch-heavy meals, this product can significantly reduce your calorie-absorption from said carbohydrates.

Natrol have loaded Carb Intercept with a potent dosage of White Kidney Bean Extract, which as we’ve already established, inhibits the carb-digesting enzyme amylase.

In addition to its carb-blocking effects, Carb Intercept also contains a healthy dose of chromium which contributes to normal macronutrient metabolism and also helps regulate blood sugar levels, meaning it’s great for keeping your cravings for sweets to a minimum and keeping your energy levels high.

The bottom line: it’s vegetarian-friendly, suitable for both men and women, and the clinically proven formula combined with the extremely affordable price tag makes this a product to consider in our book.

5. GNC Phase 2 Carb Controller

GNC Phase 2 Carb Controller Product Image
We Rated It:

GNC (General Nutrition Centers) are a household name in the supplement industry and have a fantastic reputation for producing highly effective products. Their in-house weight loss range entitled “total lean” includes just about every single weight loss pill in existence, so it should not come as a surprise that they offer a carb blocker.

We have placed their Phase 2 Carb Controller at #5 on our list because of the potent, clinically proven formula, and great price point.

This is another 1-ingredient product, offering consumers 1000mg of the highest-quality White Kidney Bean Extract. GNC states that when taken prior to a carb-heavy meal, this product can help reduce up to 50% of the carbohydrate-calories by inhibiting the amylase enzymes inside your stomach.

The bottom line: when it comes down to it, GNC have an excellent track record of producing great quality weight loss supplements at a great price, and their carb blocking pills are no exception

6. Irwin Naturals 3-in-1 Carb Blocker

Irwin Naturals 3-in-1 Carb Blocker Product Image
We Rated It:

3-in-1 Carb Blocker from Irwin Naturals is a multi-functional carb blocking weight loss pill that should definitely be on your shopping list. 

This product finds itself in position #6 because, as the name suggests, it’s a 3-in-1 product that offers consumers a well-rounded weight loss solution.

While the main function of this product is to inhibit carbohydrate absorption inside the stomach, the product is also formulated to enhance digestion speeds and improve the user’s metabolic rates. 

It is also supported with a healthy dose of chromium, which helps contribute towards the metabolism of macronutrients.

The bottom line: Irwin Natural are a company known for their high quality supplements that actually work. This formula is an excellent option for anyone looking for support towards their weight loss goals.

7. Sheer Block

Sheer Block Product Image
We Rated It:

Sheer Block is a max strength carbohydrate blocker produced by Sheer Strength Labs.

We’ve positioned it at #7 because this is essentially a 2-in1 combination product with numerous weight loss benefits.

Sheer Strength Labs state that Sheer Block supports healthy weight loss in women and men in two primary ways – 1. by significantly reducing the calories the user absorbs from their foods, and 2. by boosting the user’s metabolic rates, causing the body to burn calories at a faster rate.

At the core of Sheer Block is a potently dosed complex of White Kidney Bean Extract and Green Tea Extract (containing 56% polyphenols).

The bottom line: these carb blocking pills are competitively priced and are a great choice for somebody who’s also looking for a product with added Green Tea Extract.

8. KeoSpark Carb Blocker

Keospark Carb Blocker Product Image
We Rated It:

KeoSpark is an impressive multi-functional Carb Blocker produced by Kingdom Life Sciences.

We have put KeoSpark in position #8 of our roundup list because it’s an effective carbohydrate-calorie blocking complex.

Kingdom Life Sciences claim that the formula helps support healthy weight loss by supporting normal energy levels, reducing your daily calorie intake and by boosting normal metabolism speeds.

After further research, we found that KeoSpark will very likely make good on its promises – the formula contains a large dose of White Kidney Bean Extract to inhibit amylase enzymes.

The bottom line: due to the jam-packed formula, this product is somewhat expensive, however we believe it’s worth the money (especially when you consider that it’s loaded with proven ingredients).

9. Carb Crush

Base Carb Crush Product Image
We Rated It:

Carb Crush is a powerful carbohydrate blocker made by a company named BASE Nutrition. This product saw some serious hype after BASE claimed it was a “smart weight loss pill” that “allows you to cheat on your diet”.

Carb Crush is coming in at #9 because the product contain some very useful ingredients for supporting weight loss in both men and women.

At the core of this product is a proprietary blend of three active ingredients: Grape Seed Extract, Delphinol and Chromium. Interestingly, this is the only product on our list to utilize the branded Moqui Berry Extract named Delphinol – an ingredient which has clinical studies showing it can help “contribute to improving carbohydrate and lipid metabolism”.

The bottom line: all suspicious marketing ploys aside, this product is very helpful for supporting weight loss.

10. C Block

Cblock Carb Blocker Product Image
We Rated It:

And finally, in position #10 we come to Absolute Nutrition’s C Block. We simply had to pay homage to the product that started it all.

Unknowingly, Absolute Nutrition released a product-type that would become a smash-hit with dieters worldwide, and still to this day does the product hold up well.

The C Block carb blocking pills are powered by a formula consisting of a potent dose of Chromium and Vanadium, with a large dose of White Kidney Bean Extract. 

When used in conjunction with a low-calorie diet plan, can help support healthy and natural weight loss.

The bottom line: it may be old, but C Block still works, very well. The formula contains the same ingredients as all the market-leading carb inhibitor formulas and we don’t see why any consumer who uses it correctly wouldn’t see decent results from it.

Carb Blocker FAQ

Below you'll find a list of the most commonly asked questions.

For most users, carb blocker pills can work very well for those looking to lose weight. Carb blockers work by reducing the amount of calories the body can absorb from the carbohydrates in your diet.

They are taken with, or directly after, a meal and work to prevent amylase, which allows the carbs to pass through your body undigested.

The answer to this question is entirely dependent on the ingredients used within each particular carb blocker product. We would say that for the most part, yes they are complete safe, provided that they’re using the correct ingredients and contain nothing dangerous.

As establishing whether a particular carb blocker is safe can be somewhat difficult and require a thorough understanding of nutrition, we recommend you just stick to the top 10 list above, or ask your doctor prior to using the product.

To use carb blockers properly, you will need to consume the product directly before, during or after a carb-heavy meal.

Taking the product when you haven’t eaten will produce no such carbohydrate neutralizing effects – the carb blockers must be in your stomach at the same time as the food in order to work.

Side effects are typically rare, however users may possibly experience the following:

  • Bloating
  • Flatulence
  • Diarrhea
  • Gastric discomfort
  • Nausea

Note: these side effects are possible but are unlikely to be the typical user experience.

It’s very easy to lose weight without exercise while using Carb Blockers, as long as you ensure you’re not consuming more calories per day than your body requires. For men this is usually around 2500 Kcals per day and for women it’s around 2000 Kcals per day.

Carb Blockers will help reduce your overall calorie absorption from carbohydrates, which can contribute towards weight loss. Remember, no weight loss supplement can counteract a diet of excess.

If you do decide to exercise while using carb blockers and monitoring your daily caloric intake, you can expect to see weight loss results significantly faster than those who do not exercise.

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