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Leanbean Fat Burner Review: Pro, Cons, and Effectiveness

Written by Lauren Panoff, MPH, RD

Published on February 12, 2021

Our Expert Rating:

2.3

About This Rating
The average rating of this product is calculated based on the evaluation of the following factors:
  • Support for Claims:3.0
  • Ingredient Safety:1.0
  • Value for the Price:2.0
  • Brand Transparency:3.0

Leanbean is a fat burning supplement for women that contains a few ingredients with the potential for supporting healthy weight maintenance. However, it also contains several ingredients that lack evidence and have safety concerns.

Leanbean Fat Burner Review: Pro, Cons, and Effectiveness

Pros

  • Ingredient list is easy to read without any proprietary blends.
  • Contains a few ingredients with promising evidence of supporting metabolism for healthy weight management.

Cons

  • Requires a high maintenance daily dosing routine, likely not sustainable for most people.
  • Contains several ingredients that lack clear purpose or evidence from human trials and at least one that may carry risk of liver toxicity.
  • Does not bear a third-party testing seal.

What Is Leanbean?

Leanbean fat burner is designed to promote fat loss for women. It’s said to reduce appetite, increase metabolism, and burn fat.

It contains antioxidants, vitamins, minerals, and substances intended to boost energy and support weight loss.

Evaluation of Ingredients

While the site outlines the basics of each ingredient, it doesn’t include scientific evidence behind them.

I’m also unsure what makes this product designed for women, as advertised. Here’s what I could find about ingredient effectiveness in relation to weight loss.

Konjac Fibre (Glucomannan)

Glucomannan is considered a dietary fiber. An older review from 2005 on preliminary research states that 2–4 grams of glucomannan per day could result in significant weight loss among obese adults by promoting satiety and fat loss through stool.

However, more recent research doesn’t seem to support this.

In a 2013 randomized controlled trial, 53 participants, aged 18–65 years and with a BMI of 25–35 kg/m², were given 1.33 grams of glucomannan or placebo with 8 oz of water before each of three meals per day.

Researchers found that, while glucomannan was well tolerated, there was no difference in weight loss seen between intervention and placebo groups after 8 weeks.

In a 2014 systematic review and meta-analysis of 9 randomized clinical trials, researchers concluded that evidence was lacking in using glucomannan for weight loss.

Choline

Choline is an essential compound for fat transport and metabolism. It helps prevent fat and cholesterol buildup in your liver.

Animal studies show that the addition of choline supplementation to a ketogenic diet can help prevent fat accumulation in the livers of rats.

However, there’s not much research on choline and fat metabolism relevant to weight loss.

A small 2014 study divided 22 female athletes into two groups, finding that those who took choline for one week experienced more reduction in body weight and fat mass biomarkers.

Chromium Picolinate

A 2010 randomized controlled trial found that daily supplementation of 1000 ug of chromium picolinate for 24 weeks had no effect on weight loss among overweight adults, even when paired with nutrition education.

And in a 2013 Cochrane review of 9 studies, including 622 participants, researchers concluded there was no current, reliable evidence for using chromium picolinate for weight loss.

Vitamins B6 and B12, Zinc, Chloride

One animal study found that B vitamins helped reduce weight gain among rats on a high fat diet by improving metabolism-related enzyme activities.

A small 2019 RCT of 40 obese adults found that adding 30 mg/day of zinc supplementation for 15 weeks to a reduced calorie diet was more effective than placebo in reducing anthropometric measurements, insulin resistance, appetite, and inflammation.

Chloride is excreted in gastric juices to aid digestion, but I don’t see the reason for adding it to this supplement.

Green Coffee

Green coffee contains chlorogenic acid. It has been shown to be helpful in promoting weight loss in several animal studies.

I found human research limited. In a 2018 randomized controlled trial, participants were given either 400 mg of green coffee bean extract (GCE) daily or a placebo.

The authors found that GCE seemed to help reduce systolic blood pressure, fasting blood sugar, insulin resistance, abdominal fat, and possibly appetite.

A 2017 clinical trial also found that consuming chlorogenic acid before sleep could promote fat oxidation overnight.

Turmeric

Potential weight loss benefits of turmeric are related to its active component, curcumin.

Some lab studies indicate that curcumin may lower inflammatory markers often present in obesity.

A 2019 review of 21 studies found that curcumin could help reduce BMI, waist circumference, and weight while increasing the metabolism-regulating hormone adiponectin.

A 2015 study found that curcumin increased weight loss and reduced body fat and other anthropometric markers.

Garcinia Cambogia

While the weight loss benefits of garcinia cambogia are attributed to its hydroxycitric acid content, the evidence is mixed for effectiveness.

Some studies say it may help with short-term, small amounts of weight loss, while other studies have found it to be no more effective than placebo.

Acai Berry

I’m unclear why the product contains acai, as it just says that it “packs a powerful punch.”

Acai is rich in antioxidants, but I didn’t find any studies suggesting it plays a particular role in weight loss.

Piperine

This is the active component of black pepper, which can boost the bioavailability of curcumin by 2000%.

Verdict on Claimed Benefits

Here is our summary of the available support for the claimed benefits of Leanbean, based on the available studies:

  • Banish cravings and reduce caloriesModerate Evidence
  • Kickstart fat metabolismModerate Evidence
  • Boost energy and focusModerate Evidence

Side Effects, Safety, and Dosage

One bottle contains 180 capsules, a one-month supply.

Take 2 capsules before breakfast, lunch, and dinner, for a total of 6 capsules per day, with 8oz (240mL) of water 30 minutes before eating.

The website says that this product is made in FDA-registered facilities, following GMP quality standards.

Consumers should be aware that these are requirements of any dietary supplement company and do not mean the brand is necessarily going above and beyond.

The FAQ section states the product is “3rd party tested to ensure purity and quality,” but there is no further detail, and the product doesn’t visibly bear a third-party seal.

According to research, side effects of glucomannan include abdominal discomfort, diarrhea, and constipation.

An animal study found that prolonged use of green coffee may cause bone calcium depletion.

It’s best to speak with your doctor before starting this product, as it may interfere with certain medications.

Pregnant and breastfeeding women should not take it due to a lack of safety information.

I’m mostly concerned about garcinia cambogia and the risk of liver damage. Supplements containing garcinia cambogia have caused liver failure and toxicity.

The FDA has released several reports about tainted weight loss supplements, many of which contain this ingredient.

While this, of course, may not be the case here, there’s no visible third-party testing seal or information that would alleviate some concerns.

Cost and Where to Buy

A one-month supply is $59, but you can get two months for $118 or 4 months for $185.

All three come with a home workout guide, details of which are not described, and the 4-month bundle also includes a healthy eating guide.

The website states that if you follow the 6 capsules/day regimen for 3 months and don’t think it’s helped with fat loss, you can get a refund.

However, instructions on how to do so are not easy to find.

How It Compares

The fat loss supplement market is very saturated. Many products use garcinia cambogia, turmeric, and green coffee bean extract, among other compounds.

Compared to other products, Leanbean has a higher price point.

It doesn’t, however, include a “proprietary blend” as many others do. Instead, it lists all of its ingredients and amounts clearly on the label.

The Bottom Line

As a dietitian, I tend to steer away from fat-burning supplements in general. Instead, I promote a whole foods diet and active lifestyle for a healthy weight.

While the product contains a few ingredients that may complement a healthy lifestyle, I’m not convinced that it’s worth the investment for most people.

I don’t like that it doesn’t have a third-party seal indicating testing has been done to assure safety, particularly with garcinia cambogia.

Due to the high price and questionable efficacy of the ingredients, I would not recommend this supplement for weight loss.

A Word from Our RD

If you want to lose weight, whole plant foods, in particular, are rich in dietary fiber, known to promote satiety, reduce appetite, and help prevent overeating.

They also offer many vitamins, micronutrients, and antioxidants, without risk of toxicity or interaction with medications.

There are no shortcuts to losing weight. Eating a nutrient-rich diet and engaging in regular exercise will help you meet your goals.

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