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Leanbean Fat Burner Review: Is It Safe and Effective for Weight Loss?

Written by Lauren Panoff, MPH, RD

Reviewed by Anthony Dugarte, MD 

Last Updated on July 23, 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 women’s fat-burning supplement that contains a few ingredients with some evidence for supporting healthy weight maintenance. However, it also contains several ingredients that lack evidence and have safety concerns.

Leanbean Fat Burner Review: Is It Safe and Effective for Weight Loss?

Pros

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

Cons

  • Requires a high maintenance daily dosing routine that’s 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 claimed 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 manufacturers outline the basics of each ingredient in Leanbean, they don’t include scientific evidence behind them.

I’m also unsure what makes this product designed specifically for women.

Here’s what I could find about ingredient effectiveness concerning weight loss:

Glucomannan, 3,000 mg

Glucomannan is considered a dietary fiber that is obtained from the roots of the konjac plant.

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.

Summary:

There is currently not enough evidence to support the use of glucomannan for long-term weight loss. 

Choline, 82.5 mg

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.

Summary:

While choline is an essential nutrient, there is little evidence to support that it will help reduce body fat. 

Chromium Picolinate, 35 mcg

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.

Summary:

In a recent review of 9 studies, including 622 participants, researchers concluded that there was no current, reliable evidence for using chromium picolinate for weight loss.

Vitamins B6, B12, and Zinc, 1.7 mg, 2.4 mcg, 11 mg

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.

Summary:

While these are all essential nutrients, there is little to support that they play a significant role in helping reduce body weight. 

Green Coffee, 50 mg

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

I found that human research is limited. In a 2018 randomized controlled trial, participants were given 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.

Summary:

There is moderate evidence that green coffee may help promote fat loss. 

Turmeric, 50 mg

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.

Summary:

There is limited evidence that turmeric helps support weight loss, but it may do so by reducing inflammation. 

Garcinia Cambogia, 100 mg

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.

Summary:

The evidence remains mixed on the effectiveness of garcinia cambogia for weight loss.

Acai Berry, 20 mg

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, 5 mg

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

Verdict on Claimed Benefits

Below is our summary of the available evidence for the claimed benefits of Leanbean based on the available research:

  • Banishes cravings and reduces caloriesModerate Evidence
  • Kickstarts fat metabolismModerate Evidence
  • Boosts energy and focusModerate Evidence

Overall, most of the ingredients in Leanbean either lack solid data for their intended use or are primarily supported by studies that are small or conducted on animals.

Side Effects, Safety, and Dosage

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 Leanbean, as it may interfere with certain medications.

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

Additionally, it’s important to be aware of the risk for overall nutrition and energy deficiencies when using supplements that claim to reduce your appetite.

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.

The website states 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 website’s 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.

To take Leanbean, the manufacturers instruct a dose of 2 capsules before breakfast, lunch, and dinner, for a total of 6 capsules per day, with 8 oz (240 mL) of water 30 minutes before eating.

Cost and Where to Buy

One bottle of Leanbean contains 180 capsules, a one-month supply, and costs:

  • 1-month supply: $59.99
  • 2-month supply: $119.98
  • 4-month supply: $189.97

All three options 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 per 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 Leanbean Compares to Alternatives

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

Compared to other similar supplements, 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.

I would still not recommend weight loss supplements as most, including Lean Bean, have limited evidence of their effectiveness.

The Bottom Line

While Leanbean 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 be inclined to recommend this supplement for weight loss.

A Word from Our RD

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.

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. However, eating a nutrient-rich diet and engaging in regular exercise will help you meet your goals.

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