Although carb blocker side effects are rare, some individuals may experience unpleasant – but not dangerous – effects when first using these weight loss supplements.
Carbohydrate blocker supplements are used to bypass enzymatic metabolism of long-chain polysaccharides. By allowing some ingested starchy foods to pass through the digestive system with being broken down metabolically, weight loss goals may be supported
The benefits of using Carb Blockers are similar to those of cutting back on caloric intake. The carb-heavy foods that go undigested do not add to caloric gain.
Over time, proper usage of a quality carbohydrate blocker supplement may help with weight loss, insulin sensitivity, blood-glucose modulation and more. These supplements are also considered safer than many other weight loss supplements used today.



- Helps reduce the absoprtion of carbohydrates
- Suppresses the appetite & feel full
- May promote weight loss in a healthy diet
Carb Blocker Side Effects
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In research studies, carb blockers have been very well tolerated with a low risk of adverse effects.
When they occur, the side effects of carb blockers are temporary and mild. In most cases, these effects are similar to those caused by adding extra fiber sources to the diet.
The most common include flatulence, bloating and abdominal discomfort. Fewer users report diarrhea and/or stomach pains.
Some carb blocker supplements can cause hypoglycemic effects. This means they may lower blood glucose levels.
If you use antidiabetic medications like insulin, Micronase, Glucophage and DiaBeta, then get your doctor’s permission before beginning to use a carb blocker. Combining these substances can cause unsafe drops in blood glucose levels.
Some carb blockers contain wheat, soy and other ingredients which can cause allergic reactions in sensitive individuals. Read the ingredients of any carb blocker supplements you may be considering.
Most carb blockers contain phaseolamin from White Kidney Bean extract. If you are allergic to kidney beans, do not use these supplements.
Why Do Some People Experience Adverse Effects?
The fiber-like side effects possible with carb blockers mainly stem from the effects of these supplements on colonic bacteria.
After taking a starch blocker pill, some carbohydrate foods travel through the small intestines without digestion occurring. These foods then pass into the large intestines, and then on to the colon.
During the trip through the large intestines and colon, some of the food is acted on by gut bacteria. Other parts of the foods get partially broken down by reacting with water in a process called hydrolysis.
Gastrointestinal distress is a common side effect of these processes. Individuals with IBS, IBD or other digestive conditions may not want to use these supplements due to a potential worsening of symptoms.
Check with your doctor to determine whether Carb Blocker diet pills are safe and appropriate for you.
Phase 2 Carb Blockers Review
Research has demonstrated health benefits with using a particular class of carbohydrate blocker supplements.
Only carb blockers that contain a phytonutrient (plant chemical) called phaseolamin have been clinically validated for any therapeutic purposes.
Phaseolamin is an active molecule found in the pods of leguminous plants from the Phaseolus vulgaris botanical genus. This genus includes various species of common beans – like green, black, kidney, pinto, garbanzo, Lima and navy beans.
White kidney beans have been found to contain the highest concentrations of phaseolamin.
Most clinical trials on carb blockers have used a patented brand of phaseolamin-containing supplements called Phase 2.
The phaseolamin contained in Phase 2 carb blockers is sourced only from white kidney bean pod extracts.
Numerous carb blocker supplements from various manufacturers contain Phase 2 phaseolamin. Available forms include powders, capsules, pills, beverages and sprinkle packs.
In research studies and reviews, Phase 2 Carb Blockers have demonstrated a low risk of side effects and a good safety profile. Carb Blockers work by affecting an enzyme called Alpha Amylase, which is found in the digestive tract. Alpha amylase is the most common digestive enzyme in mammals. In humans, it is secreted from the salivary glands and the pancreas during digestion. When carbohydrate foods enter the mouth, the digestive process begins with alpha amylase breaking down chemical bonds that hold long-chain carbohydrates (polysaccharides) together. This prepares these carbohydrates to be converted into simple sugars – like glucose – which can then be absorbed into the body and used for energy. By blocking the effects of this enzyme, you may be able to reduce the amount of sugars from carbohydrate-rich foods that are actually absorbed by the body. When the foods reach the stomach, the actions of alpha amylase are suppressed by hydrochloride acid. After exiting the stomach, more alpha amylase is released into the small intestines by the pancreas. It is at this point that phaseolamin acts to inhibit alpha amylase activities. In this manner, phaseolamin temporarily impedes or stops the alpha amylase-driven breakdown of carbohydrate foods in the small intestines. The net effect of taking a Carb Blocker like White Kidney Bean extract is to safely reduce the number of calories that you derive from some of the foods that you eat. This can have benefits for diet and weight loss results, as well as helping to improve blood sugar control and reducing some of the negative effects of obesity on the body. The Natural Medicines Comprehensive Database states that Phaseolus vulgaris carbohydrate blockers are used mostly for weight loss and obesity. Other uses include treatment for hypercholesterolemia, kidney and bladder stones, urinary tract infections (UTIs), lung cancer and diabetes. P. vulgaris supplements are also used as diuretics to increase urination frequency. Not all carb blockers contain the same ingredients. Of those that contain phaseolamin, some contain more than others. There are no standardized dosing protocols or formulations for carb blocker supplements. The best dosage levels for a given user will depend on health history, food choices, eating habits, exercise level, age and more. Read the dosing instructions of the carb blocker supplement you may select very closely. Always begin supplementation in the low recommendation range until you understand how a given supplement will affect you. Higher doses could result in an increased risk of negative effects from taking Carb Blocker supplements. It is always best to seek medical advice before beginning to use any supplement. Health professionals agree that choosing proper foods, eating those foods in appropriate proportions, getting daily physical activity and managing stress are important keys for promoting weight loss. Using a phaseolamin carb blocker supplement is only meant to help the process. Carb blocker side effects are uncommon. When they occur, in most cases, they are not serious and pass quickly on their own. While some carbohydrate blocker supplements can help with losing weight, these supplements should not be considered stand-alone weight loss therapies.
Carb Blocker Benefits
Safe Carb Blocker Dosage Recommendations
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Article last updated on: March 12th, 2018 by Nootriment