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Skinny Fiber

Skinny Fiber is a diet pill that is advertised mainly as an appetite suppressant. However, the official website makes a number of unverified claims about the product.

Below we have reviewed Skinny Fiber against our review criteria to help consumers make an informed decision.

Skinny Fibre review

Skinny Fiber Pros
  • Contains glucomannan, an ingredient that has been shown in clinical trials to suppress the appetite
Skinny Fiber Cons
  • Each serving contains 5g of sodium - 3g above the recommended daily intake

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Skinny Fiber Review

Advertised as having the potential to help with several areas of weight loss, Skinny Fiber contains a number of herbal ingredients and some enzyme powders. Some of the ingredients have been suggested to be beneficial for weight loss in clinical studies, whilst others are largely understudied. The official website does not back any of its claims with links to scientific evidence.

Claimed weight loss benefits

Skinny Fiber claims to help promote weight management, support detoxification, provide antioxidant properties, support healthy digestion and suppress your appetite.

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How Skinny Fiber Works


Skinny Fiber’s three natural ingredients are intended to suppress your appetite. Appetite suppression is a technique intended to help you restrict your calorie intake by relieving you of the urge to snack or overeat. It is also claimed that Skinny Fiber boosts your metabolism, but there is no evidence to support this.

The manufacturers claim that the enzymes in their product are the key to easy weight loss. They state that most people suffer due to a lack of enzymes in their diet. This apparently leads to our bodies having higher levels of toxins, a weaker immune system and more fat. This “enzyme deficiency” is allegedly what makes it so difficult to lose weight. There is no evidence to support the “enzyme deficiency” phenomenon.

Skinny Fiber’s ingredients can be divided into two categories: herbal and enzyme powders. The herbal ingredients (glucomannan, Chá de Bugre and Caralluma) are supposed to suppress your appetite and boost your metabolism. The enzyme powders are to supposedly remedy the ‘enzyme deficiency’ that Skinny Fiber’s manufacturers claim that you have.


Glucomannan is a substance extracted from the Konjac root, which is quite a well-known appetite suppressant – it’s the main ingredient in Slimsticks. It suppresses your appetite in quite a simple way: when it gets into your stomach, the glucomannan absorbs up to 50 times its own weight in water, causing it to expand. This expansion makes your stomach feel full and reduces your desire to eat.

Chá de Bugre

Chá de Bugre refers to the red fruit from the Chá de Bugre tree. The fruit is native to Brazil, and is a popular ingredient in diet supplements. Companies that manufacture supplements containing Chá de Bugre, including Skinny Fiber, claim that it helps to suppress your appetite, but they don’t specify how it does so. In addition, there is no scientific information that supports this widespread speculation. We cannot definitely say it doesn’t work, but nor can we say it does.


Caralluma is listed as one of the ingredients of Skinny Fiber. By this, we assume they mean Caralluma fimbriata, a plant that is used in a number of diet supplements. Caralluma fimbriata has been suggested to work as an appetite suppressor – however to have a significant effect on weight loss, it is thought that you need to ingest a relatively large amount of it.


The companies selling Skinny Fiber would have you believe that the enzymes that it contains will boost your immune system, reduce your body fat and make you more energetic. Aside from being digested, these enzymes are not thought to be useful to your body; enzymes are something our body makes itself – not something we need in our diet.

Enzyme deficiency is a scam that has been used before. Around 10 years ago, a company made similar claims about enzyme deficiency and said that their product, Nu-Zymes, was the cure. The Food and Drug Administration warned them that they were making illegal claims about their product, and the operation was shut down.

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Key Skinny Fiber Ingredients

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Glucomannan is taken from the root of the Konjac plant. When ingested, glucomannan expands in your stomach by binding up to 50 times its own weight in water; this creates a feeling of fullness. Glucomannan has been confirmed by the European Food Safety Authority as having clinically proven effectiveness in helping to reach a healthy body weight through appetite suppression.

Chá de Bugre

Chá de Bugre, the next ingredient on the list, is a Brazilian fruit, as well as a purported metabolism booster and appetite suppressor. Despite its popularity in weight loss supplements, there is no scientific proof behind these weight loss claims.


Caralluma is another ingredient that is advertised as an appetite suppressor and it has been stated to have the ability to stave off hunger, leading to it being referred to as “famine food”. However, it has been said to only cause significant weight loss when given in a dosage of 100 mg per kg of body weight, meaning an average human would have to ingest 6.2 grams of Caralluma. A serving of Skinny Fiber only contains 1.42 grams of ingredients (this includes the enzyme powders) per serving, so the quantity of Caralluma in Skinny Fiber might not have an effect.


Looking at the label for the bottle, we noticed that Skinny Fiber also contains a significant amount of sodium: 5 grams –the World Health Organisation’s recommendation is less than 2 grams.

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Clinical Studies

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Skinny Fiber itself has not been tested clinically. As is the case with many supplements, we have to rely on clinical studies of the individual ingredients to give us the information we need.


If Skinny Fiber causes any noticeable weight loss, it’s probably down to the glucomannan that it contains. Glucomannan is an extract from the Konjac root, which expands in your stomach in order to suppress your appetite. It’s also the ingredient with the most clinical evidence behind it.

Glucomannan is an EFSA approved ingredient for treating weight loss. This means that the European Food Safety Authority has examined a number of clinical studies on glucomannan, in what’s called a meta-analysis, and judged that glucomannan is a suitable and effective chemical to be consumed in order to lose weight. They deemed that there was “a cause and effect relationship” between taking ingesting glucomannan and losing body weight. They also stated that consuming glucomannan for the purpose of regulating blood cholesterol concentrations has a “favourable outcome” – so it is likely to work.

Whilst glucomannan has evidence to support that it can help people lose weight, there is the issue of the quantity of glucomannan in Skinny Fiber. The previously mentioned report by the EFSA states that a minimum of 3 grams, taken in three 1 gram doses, is needed to bring about the claimed effect. This is an issue because Skinny Fiber only contains 1.16 g in total of its three main ingredients per serving (1 serving = 2 pills), so if we assume that this 1.16 g is divided equally between the three ingredients, there’s only around 0.4 g of glucomannan per serving.

For more information see the EFSA’s report.

Chá de Bugre

Chá de Bugre is a Brazillian fruit from a tree of the same name and another ingredient in Skinny Fiber. Although present in a few diet supplements, Chá de Bugre is quite an obscure ingredient and as such has not been subjected to clinical testing for weight loss properties. There is not currently any clinical evidence to support the claims that Chá de Bugre is a metabolism booster or an appetite suppressant.

Caralluma Fimbriata

Caralluma fimbriata is a plant, thought to have appetite-suppressing properties. It has been suggested to be an appetite suppressant in a clinical trial where 50 people participated, which also indicated that Caralluma fimbriata helps to reduce waist circumference – however, it was not shown to have a significant effect on body weight in humans. Another trial done on obese rats did in fact show that it could have a positive effect on their body weights. When given a dosage of 100 mg per kg of body weight, the rats showed significant weight loss.

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Skinny Fiber Side Effects

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Bloating is a common side effect of supplements that contain glucomannan. A number of reviews on Amazon claim that Skinny Fiber actually caused them to gain weight and it is possible that the sodium could lead to various heart or blood problems.


A rather common side effect of Skinny Fiber appears to be bloating. Skinny Fiber contains an ingredient called glucomannan, which expands in your stomach; this creates a feeling of fullness, which is how it suppresses your appetite. Ingesting glucomannan is a way of convincing your stomach that you’ve eaten a large amount of food (without actually consuming many calories) and so that’s how it feels to your body. Therefore, if you tend to get bloated after large meals, then it’s likely that you’ll get bloated after taking Skinny Fiber. The ingredient has been associated with a number of other gastro-intestinal problems, including blockages. For this reason it is recommended that you take the supplement with plenty of water.


Each serving of Skinny Fiber (2 capsules) contains a high amount of sodium – 5 grams to be precise. This may sound like very little, but the recommended daily amount of sodium is 2 grams at the very most (as stated by the World Health Organisation).

Sodium is the ingredient in salt that we need to limit our intake of. Consuming excessive amounts of salt can lead to dire consequences. A surplus of sodium causes your body to hold onto water in order to maintain the vital salt-water balance in your body. This extra water puts more of a strain on your circulatory system, your heart and blood vessels, which in turn can lead to higher blood pressure. Higher blood pressure means a higher chance of heart disease or having a stroke.

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How to Use

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Skinny Fiber capsules are to be swallowed in the same way you would take any other tablet. We recommend that you take them in conjunction with drinking two or three glasses of water. This is for two reasons. Firstly, it helps the tablets’ transition to your stomach; the flow of water will carry them with it along their way. This is advantageous because there is a remote risk of choking, otherwise if a Skinny Fiber pill gets stuck in your throat, one of its key ingredients, glucomannan, will expand and this could cause asphyxiation. The glasses of water eliminate this problem. The other reason is that glucomannan suppresses your appetite by expanding in your stomach, and it expands in your stomach by binding water to itself. Hence, by drinking plenty of water you’ll give the glucomannan in Skinny Fiber what it needs to perform its task.

Skinny Body Care, the company behind Skinny Fiber, advises a dosage of two servings of Skinny Fiber per day. Following this guidance, one standard 120 capsule bottle of Skinny Fiber will last you for one month: 1 serving = 2 capsules, therefore 120 capsules = 60 servings and 60 servings = 30 days at 2 servings per day. It is recommended that you take Skinny Fiber before meals – around 30 minutes beforehand so that the ingredients will have enough time to get to work.

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Who Makes It?

The company behind Skinny Fiber is called Skinny Body Care. Established in 2011, Skinny Body Care is a global company that sells “health” products. These products are Skinny Fiber and their anti-ageing skin cream, Ageless. They are based in Murray, Utah, in the US. Skinny Body Care can only be contacted via their email address, or by post since they don’t provide a telephone number. They do provide return addresses in the USA, Germany and Australia: they can be found under the ‘contact us’ section of their website.

Skinny Body Care offers anyone the opportunity to become a distributor for them: they’re willing to let you pedal their ineffectual health products to people you know for a commission (2% or 3%) on each sale.

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Where to Buy Skinny Fiber


Since Skinny Fiber isn’t sold in any high street stores, your buying options are limited to those of the online variety. One option is to buy directly from the manufacturer’s website. For 60 servings (120 capsules), the price, including shipping, is $68.92 or £45.09. The advantage of buying from Skinny Body Care directly is that you can save money by buying in bulk: you can get three bottles for $128.82 or £84.27, or six bottles for $188.67 or £123.43. If you sign up to be a preferred customer, you also get a free bottle of their “Ageless Anti-Aging Serum” if you order the six-bottle option.

From, you can get 120 capsules for $59.95 or £39.22 with free shipping in the US –if you live elsewhere, shipping will be a significant extra charge. Skinny Fiber is not available on, although there are a few brands with similar names. From time to time, you can find Skinny Fiber being sold on eBay. We do not recommend purchasing supplements from eBay as you cannot guarantee that you will receive the legitimate product.

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Does Skinny Fiber Meet our Approved Criteria

Money-back-guarantee: There is no mention of a money-back guarantee.

One-off payment: Yes, it can be purchased through the official website or Amazon.

Manufacturing Standard: No manufacturing standards are mentioned.

Accompanying Diet Plan: A diet plan does not appear to be offered alongside the product.

Ingredients and quantities disclosed: No – a full ingredients list with quantities isn’t provided.

Company contact details readily available: Only an email address and postal address is available, no phone number.

Skinny Fiber does not meet our ‘Approved’ criteria as there is no money-back guarantee or diet plan and some information is lacking, including manufacturing standards and a full ingredients list.

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Overall Verdict

Skinny Fiber is said to target several key areas of weight loss. The product as a whole has not been scientifically tested. Some of the key ingredients have been subject to clinical study. The results of these trials are varied; glucomannan has been shown to have an appetite suppressing effect, but the claimed metabolism boosting benefits of the product have not been proven. The official website makes a number of unverified claims, particularly relating to the supposed effects of the ‘enzymes’ that are included in the product.

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