Updated: 02/02/2016 - Sponsored by Leptigen

Carbolin-19 Review - Does This Supplement Really Work? Are lack of real weight loss results and ineffective ingredients deal breakers?

Editor's Review: 3.5 / 5.0


Why is it that so few diet products are backed by science? Let’s find out if Carbolin 19 is one of the good ones. Here at DietSpotlight, we conducted an in-depth review, taking a close look at the ingredients, side effects, customer-service quality and scientific research. We additionally read all sorts of user comments and dieter reviews from all over the web. At last, we summarized and compressed this information to give you the important facts you need.

EDITOR'S TIP: Combine Carbolin-19 with a proven fat burner such as Leptigen for better results.

What You Need To Know

To begin, Carbolin 19 is marketed as an “anabolic/lipolytic agent,” and it’s made by Biotest, LLC. This supplement is claimed to decrease fat mass, increase muscular pump, improve strength gains and help with muscle building. In order to use this product, you need to take 1-2 capsules in the morning and then 1-2 more capsules six hours later. The core ingredient in this supplement is Carbolin 19 Bioenhanced Forskolin (20 milligrams). Forskolin or Coleus Forskolii has been shown to widen blood vessels and encourage a more powerful heartbeat. This can help lower blood pressure and even treat asthma.

It is unclear when Carbolin 19 was first released, but we did find this supplement for sale on websites like Amazon for $29.95 (60 capsules). Although the official website for Biotest is nonfunctional, there are some positive comments posted online for Carbolin 19, but read on…

Lack of Real Weight Loss Results – A Concern?

The first concern we had with Carbolin 19 is the lack of real weight loss results. According to our Research Editor, “After reading a number of customer reviews for Carbolin 19, it’s clear that this supplement is not producing the fat loss results it claims to.”

One user commented, “So no weight loss results with this product!”

“Didn’t notice this doing anything even with a strict diet and training protocol,” said another customer.

Scroll below for one of the best products we’ve seen over the last year.

Ineffective Ingredients – Something Else to Think About

The key ingredient found in Carbolin 19 is Forskolin, which according to WebMD, has not been proven to help with weight loss or muscle building. One user mentioned, “Doesn’t actually help you lose weight or bulk up.”

Another person stated, “This product does absolutely nothing for me! What’s the point?”

Our research has shown if there is some particular facet of a diet supplement or workout program that is quite problematic or concerning (lack of real weight loss results, ineffective ingredients, poor BBB rating) the probability of long-term results is low. This means if Carbolin 19 does not produce real results for a high number of people, this could be a major issue.

Is There Any Real Science?

Since the official website for Carbolin 19 was not working, we could not determine if any actual science or clinical research is presented to support the claims pertaining to Carbolin 19. From what we could tell, there is no solid science behind this supplement. Unfortunately, we at DietSpotlight need to see some actual research that backs the product we’re reviewing.

The Bottom Line: Does Carbolin 19 Work?

So, should you run out and buy Carbolin 19? Well, first of all, we like that this supplement is readily available on dealer websites such as Amazon, and we did find some positive comments about it online. Then again, we have some reservations about Carbolin 19 because it does not appear to be backed by any documented science. Also, we’re concerned about the negative user reviews we found posted on the web.

If you’d like to drop more weight, then we encourage you to choose a product that contains clinically proven ingredients, comes with excellent customer service and is supported by all sorts of encouraging user reviews.

Among the best products we’ve seen in 2016 is one called Leptigen. Its formula is a proprietary blend of four unique ingredients, which have been shown in documented clinical research to help speed up fat loss and boost metabolism. We can’t find any complaints of harmful adverse effects and customer comments posted online indicate people are seeing significant results.

The makers of Leptigen are so confident in their product they’re offering a Special Trial Offer, which is very encouraging.

Learn More About Leptigen »
GD Star Rating

How Does Carbolin-19 Compare?

Previous Carbolin-19 Review (Updated January 1, 1970):

What You Should Know

Click Here To See Our Highest Rated Review

Carbolin-19 is a bodybuilding supplement produced by the BioTest company. It claims to be an anabolic bridge, working just as well as the illegal steroid Anavar. Though the primary focus is the formation of lean muscle mass, it also is thought to help with fat loss. This review will take a closer look at the product to determine if there is any value to potential consumers.

List of Ingredients

Carbolin-19 contains one ingredient that we know of: colforsin 1,9-ethylcarbonate. We were not able to locate a supplement facts label to confirm this is the only ingredient.

Product Features

Colforsin 1,9-ethylcarbonate comes from Forskolin. Forskolin is the well known compound in a medicinal herb known as Coleus Forskolin. The plant has been used to treat several conditions including asthma, insomnia, and heart disease. It is only in recent years the plant has come to light with weight loss benefits. ForSlean is the patented name for the standardized Coleus Forskolin extract many weight loss supplements use. It claims to not only be a powerful fat burner, but a muscle builder, as well. There is research to support it, but the Biotest company seems to swing it in their favor, leaving out the negative information. The study supports ForSlean, which is not the same as the compound in this product, as a chemical change has been made to the Forskolin in this product.

See Our Featured


  • This supplement is available from a wide variety of merchants online.
  • This product comes with a money back guarantee.


  • Though this is a fat burner, it also builds muscle and is therefore targeted more to bodybuilders than casual dieters who just want to lose a few pounds.
  • Without a full ingredients list disclosed, we cannot tell if there are other ingredients in the formula, or how much of the active ingredient there is.
  • The clinical evidence the company cites is for a different chemical compound using Forskolin, and therefore cannot be accurate.
  • There are not free trials of this product.


While this product certainly looks good on the surface, especially for those who are more about building muscle and toning the body rather than dropping fat, we do not recommend it. Though technically a proven fat burner, the company has misleading research and product claims, more than likely produced to boost sales rather than provide honesty to customers. Consume feedback shows a mixed bag of results on this one, so we advise those who do try this product to proceed with caution. We encourage you to continue your research until you find a product that contains clinical proven amounts of clinically proven ingredients and use it with a balanced diet and regular exercise program for the best weight loss results.

One User Review About Carbolin-19

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  • 1

    is this legal? I wnt to make sure is not in WADA prohibit list


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