Leanbean Fat Burner Review: Pro, Cons, and Effectiveness
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 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.
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 is an essential compound for fat transport and metabolism. It helps prevent fat and cholesterol buildup in your liver.
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.
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.
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.
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 2015 study found that curcumin increased weight loss and reduced body fat and other anthropometric markers.
While the weight loss benefits of garcinia cambogia are attributed to its hydroxycitric acid content, the evidence is mixed for effectiveness.
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.
This is the active component of black pepper, which can boost the bioavailability of curcumin by 2000%.
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
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.
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.
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.
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.
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.
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.
At WellnessVerge, we only use primary references for our articles, including peer reviewed medical journals or well-respected academic institutions.
- Glucomannan and obesity: a critical review:
- Safety and efficacy of glucomannan for weight loss in overweight and moderately obese adults:
- The efficacy of glucomannan supplementation in overweight and obesity: a systematic review and meta-analysis of randomized clinical trials:
- Role of choline deficiency in the Fatty liver phenotype of mice fed a low protein, very low carbohydrate ketogenic diet:
- Methionine and choline regulate the metabolic phenotype of a ketogenic diet:
- Effect of choline supplementation on rapid weight loss and biochemical variables among female taekwondo and judo athletes:
- A pilot study of chromium picolinate for weight loss:
- Chromium picolinate supplementation for overweight or obese adults:
- B Vitamins Can Reduce Body Weight Gain by Increasing Metabolism-related Enzyme Activities in Rats Fed on a High-Fat Diet:
- Zinc supplementation improves body weight management, inflammatory biomarkers and insulin resistance in individuals with obesity: a randomized, placebo-controlled, double-blind trial:
- Evidence for intestinal chloride secretion:
- Inhibitory effect of green coffee bean extract on fat accumulation and body weight gain in mice:
- Effects and Mechanism of Chlorogenic Acid on Weight Loss:
- Chlorogenic acid exhibits anti-obesity property and improves lipid metabolism in high-fat diet-induced-obese mice:
- Effects of green coffee extract supplementation on anthropometric indices, glycaemic control, blood pressure, lipid profile, insulin resistance and appetite in patients with the metabolic syndrome: a randomised clinical trial:
- Effects of subacute ingestion of chlorogenic acids on sleep architecture and energy metabolism through activity of the autonomic nervous system: a randomised, placebo-controlled, double-blinded cross-over trial:
- Curcumin and obesity:
- The Effects of Curcumin on Weight Loss Among Patients With Metabolic Syndrome and Related Disorders: A Systematic Review and Meta-Analysis of Randomized Controlled Trials:
- Adiponectin as a Target in Obesity-related Inflammatory State:
- Potential role of bioavailable curcumin in weight loss and omental adipose tissue decrease: preliminary data of a randomized, controlled trial in overweight people with metabolic syndrome. Preliminary study:
- Updates on Antiobesity Effect of Garcinia Origin (−)-HCA:
- The Use of Garcinia Extract (Hydroxycitric Acid) as a Weight loss Supplement: A Systematic Review and Meta-Analysis of Randomised Clinical Trials:
- Reduction of adipose tissue and body weight: effect of water soluble calcium hydroxycitrate in Garcinia atroviridis on the short term treatment of obese women in Thailand:
- Garcinia cambogia (hydroxycitric acid) as a potential antiobesity agent: a randomized controlled trial:
- Does Glycine max leaves or Garcinia Cambogia promote weight-loss or lower plasma cholesterol in overweight individuals: a randomized control trial:
- The effects of 2-week ingestion of (--)-hydroxycitrate and (--)-hydroxycitrate combined with medium-chain triglycerides on satiety, fat oxidation, energy expenditure and body weight:
- Curcumin: A Review of Its Effects on Human Health:
- The effect of daily intake of green coffee bean extract as compared to Agiolax® on the alveolar bone of albino rats:
- Dangerous dietary supplements: Garcinia cambogia-associated hepatic failure requiring transplantation:
- LiverTox: Clinical and Research Information on Drug-Induced Liver Injury:
- Tainted Weight Loss Products:
- A comprehensive scientific overview of Garcinia cambogia: