Carb Blockers

Carb blockers are a common form of diet pills that are marketed as being able to help dieters to overcome their obesity and excess fat by delaying or preventing the carbohydrates consumed in foods from being absorbed into the body.


The claim regarding carb blockers is that they are, in essence, enzyme inhibitors. They function by reducing the production or presence of the enzymes that are required for the breakdown of carbohydrates by the body, such as amylase and alpha-glucosidases. The majority of these products use a type of protein extract from white kidney beans as their primary active ingredient. Though there are other ingredients used, this is by far the one that is most commonly found in this type of product.


There have been some studies that support the claims regarding carb blockers based on white bean extract. For example, one report in the Journal of the American College of Nutrition detailed the research performed in a physiology study from the Georgetown Medical School, which said that it does have some practical use in a clinical sense, and they found that in people and animals, the ingredient does work.


However, at the same time, the U.S. Food and Drug Administration, and other highly respected health authorities, such as the Mayo Clinic, make statements in the opposite direction. Those who do not believe that these ingredients are beneficial to dieters have stated that the claims made by many of these products simply aren’t true. The reason isn’t that the ingredient doesn’t block the enzymes – which it does – but that the body simply produces far more than the capacity of the products to block them in any meaningful way. So while the ingredient may function as promised, its effects are weak enough that no measurable benefit will result.


According to research from the Mayo Clinic, to have any beneficial effect, approximately 4000mg to 6000mg of the phaseolamin (the substance in the white bean extract that blocks the enzymes) would be required to effectively inhibit enough starch digestion to produce measurable results. Unfortunately, the average carb blockers contain 500mg or less of white kidney bean extract, meaning that the results they produce would be statistically insignificant. Moreover, the study also showed that even if dieters are given enough of the substance to reduce carbohydrate digestion, the result did not produce weight loss.


The FDA has been sending warning letters to the manufacturers and marketers several carb blockers, cautioning them that their claims are false or misleading and that they have not been supported by reliable scientific evidence. One of the most widely publicized incidences was in 2004, when the now-discontinued TrimSpa Carb Blocker makers received such a warning letter.

Carb Blockers Reviews

White Kidney Bean Extract

White kidney bean extract is a common ingredient that is found in weight loss products that claim to be able to block carbohydrates.  These carb blockers, when they work, can be helpful in reducing the number of calories that are … Read Reviews

Tagged , , , Leave a comment

Acetate Replacing Factor

Acetate replacing factor is an ingredient finding its way into a growing number of diet pills. The reason is that the research behind it looks quite promising for helping dieters. This ingredient isn’t considered proven, but it does have a … Read Reviews

Leave a comment


Quitosano is a nonprescription ingredient that is often found in over the counter supplements such as those meant to help people to lose weight. It is a natural ingredient that is sold under a range of different names such as: … Read Reviews

Leave a comment


The majority of us recognize an apple as a type of fruit that will “keep the doctor away” if we eat it on a regular basis. Many people include them as a regular part of their diet. However, these fruits … Read Reviews

Leave a comment

Bean Pod

If you’ve been looking into diet pill ingredients then you are certain to have come across bean pod at some time or another. That said, whether or not you actually recognized it as this specific substance is quite another thing. … Read Reviews

Leave a comment


Bladderwrack is a natural ingredient that has been making its way into a large number of different weight loss supplement formulas. That said, even though a substance is found in a large number of pills, it doesn’t necessarily mean that … Read Reviews

Leave a comment

Alpha Lipoic Acid

Alpha lipoic acid is an ingredient that has been finding its way into many weight loss supplements over the last decade and even longer. This is an ingredient that is listed in product formulas under any of a large number … Read Reviews

Leave a comment