Force Factor LeanFire with Next-Gen SLIMVANCE Reviews: Is It Safe?

LeanFire with Next-Gen SLIMVANCE is a supplement which promises to promote rapid fat burning and weight loss, provide added energy, and offer other health benefits.

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In This Review

What is LeanFire with Next-Gen SLIMVANCE?

LeanFire is a dietary supplement which promises a huge increase in metabolism, leading to fat-burning and possible weight loss.

It includes botanicals which could improve mood, offer brain benefits like alertness and metal focus, and improve general health and immunity.

It’s a costly product, and will likely work better for some than others.

How Does It Rate?

Overall Rating: 4.1

Value for Cost

3.9/5Value for Cost
Return Policy

2/5Return Policy


Brand Highlights

  • This product has won several awards.
  • Clinical studies show positive results.
  • The supplement is widely available in stores and online.
  • The majority of the ingredients are naturally sourced.


mct wellness

*All individuals are unique. Your results can and will vary.

Key Ingredients

  • White Willow
  • Yerba Mate
  • Caffeine Anhydrous
  • Yohimbe Bark Extract
  • BioPerine
  • Guarana
  • Curry Tree
  • Turmeric
  • Theacrine
  • Cayenne Fruit
  • Niacin
  • Horseradish Tree Extract
  • Vitamins B6 and B12


  • The supplement could provide you with added energy.
  • It may promote fat-burning and weight-loss.
  • It might improve mental focus and alertness.
  • LeanFire may strengthen the immune system.
  • The supplement could enhance mood.


  • It is very high in caffeine, which could lead to side effects like insomnia and anxiety.
  • The product is fairly expensive for the market.
  • It’s not completely organic, as it includes artificial color.

About the Brand

The manufacturer of this supplement is a company called Force Factor, which has its headquarters in Boston, Massachusetts. Founded in 2009, they are a health and wellness brand which produces natural supplements for different health concerns.

How Does It Work?

This supplement is extremely high in caffeine, which speeds up the metabolism and causes the body to enter the state of thermogenesis, which leads to burning stored fat rapidly and possible weight loss. Other ingredients may help to suppress appetite.

A review in the American Journal of Clinical Nutrition discussed the connection between coffee, diabetes, and weight control [1].

The formula is full of nutrients and antioxidants which could boost general health, as well as destroy harmful free radicals and lower oxidative stress. Some ingredients increase the bioavailability of nutrients and other substances. An article Science Direct discussed nutrient bioavailability [2].

This promotes repair and healing in the body, and may strengthen the immune system. Force Factor Lean Fire also has anti-inflammatory agents, which may decrease swelling in the body, ease the gut, and support heart health.

What Are the Ingredients?

These are some of the primary active ingredients in this supplement:


– This is a topical fruit native to the Amazon full of caffeine, which could provide energy, improve exercise endurance, and speed up the metabolism. This leads the body to burn fat rapidly and promote weight loss. In our BioSwitch Advanced Reviews article, we have thoroughly documented the presence of this ingredient, offering comprehensive insights and analysis.

It also has brain health benefits, and may enhance memory, learning, and cognitive performance. A study in Phytotherapy Research found that guarana could promote fat-burning and weight loss [3].


– This is an alkaloid which comes from the Camellia Kucha plant, and it’s a potent stimulant which has similar properties to caffeine. It stimulates the central nervous system and may speed up the metabolism, for rapid fat-burning and weight loss as we referenced in our review of Longevity Max.

There’s some limited evidence that it may improve cognitive and athletic performance. An article in Frontiers in Nutrition explored the potential beneficial health effects of Theacrine [4].

Caffeine Anhydrous

– This is caffeine which is completely dehydrated, which gives it much more potency. It could greatly speed up the metabolism, leading to fat-burning and weight loss. It also gives users tremendous energy, which may help them burn more calories.

In addition, caffeine could offer brain health benefits like added focus and alertness, and it might improve exercise performance as we documented in our review of T5 Serum XT.

A study published in the European Journal of Sports Science concluded that caffeine and caffeine anhydrous could enhance strength and sprint performance during exercise [5].


Nutrisystem Review have suggested that niacin supplementation might help regulate appetite and promote a feeling of fullness (satiety). Niacin is involved in the metabolism of carbohydrates, fats, and proteins, converting them into usable energy. Adequate levels of niacin are important for maintaining a healthy metabolism.

This is Vitamin B3, which is important for bodily health and may help lower cholesterol levels. It occurs naturally in some foods, like leafy greens, chicken, meat, and eggs. There’s some evidence that it could decrease levels of fat in the blood, which may help with weight loss.

Niacin has other health benefits, like enhancing and hydrating the skin, as well as repairing damage and decreasing inflammation. A study on mice in PLOS ONE found that niacin decreased inflammation in adipose tissue in mice fed a high fat diet [6].


– Turmeric has numerous health benefits and is well known for its anti-inflammatory properties, which can benefit a range of chronic health problems, including obesity. In the realm of weight loss supplements, turmeric or curcumin is occasionally integrated as an ingredient, just like in Zuzili Superfood Gummies. This inclusion holds the potential to lessen inflammation within the body, foster a more favorable metabolic environment, and safeguard against oxidative stress



*All individuals are unique. Your results can and will vary.

Frequently Asked Questions

Q: How Do You Take It?

A: The recommended dosage is 2 capsules in the morning with breakfast, and 2 with lunch. Do not take more than the maximum daily dosage under any circumstances.

Q: What is the Return Policy?

A: The manufacturer is offering a 30-day money back guarantee. If you’re not happy with the product, package it up with the receipt and send it back to the company within 30 days of the purchase. You should get a full refund.

Q: Is It Cruelty-Free?

A: Force Factor does not appear to be a cruelty-free company, as they do not mention it on their site and they are not on the PETA list of cruelty-free brands. They may test on animals, or may have associates or suppliers who do.

Q: Where to Buy It?

A: While this supplement is not directly for sale on the offical site, you can purchase Force Factor from numerous online retailers like Walmart, Amazon, and others as well as offline stores. The price varies quite a bit, from about $30-60 depending on where you buy.

Q: What Sets It Apart From the Competition?

A: This formula is very powerful, and includes more ingredients than some other fat-burners. However, it’s also higher in caffeine than many other brands, which may present issues for those who are sensitive.

What Do the Reviews Say?

The LeanFire reviews were fairly mixed. There were customers who did get great weight loss and energy benefits from this supplement, and some lost a fair bit. Others found the high caffeine content ad Yohimbe gave them side effects and they could not continue. Here is some of the customer feedback:

I Would Buy This Product Again

This works as an effective appetite suppressant. It does give me more energy throughout the day. –Customer

Not Worth It

I wasn’t expecting any miracles, I was just hoping that the supplement would take the edge off my hunger in the afternoons so I could avoid snacking. In the end, it made no difference, and the hunger was in no way changed.

It’s mostly a caffeine pill, which meant that if I wanted to have a cup of tea or coffee in the afternoon, I would become jittery and uncomfortable. Not worth the high price tag, better off just getting a very low calorie snack to curb the cravings and drink a cup of tea or coffee if your energy is low. – J.G

This Product Works

I started this product on June 7th and to my amazement on July 5th when I went to my doctor, I was actually down 8lbs. – Gissy


mct wellness

*All individuals are unique. Your results can and will vary.

Force Factor LeanFire with Next-Gen SLIMVANCE – Conclusion

LeanFire Force Factor is a dietary supplement which aims to provide great fat-burning, appetite suppression, energy, and weight-loss benefits. In addition, it may sharpen thinking and mental focus, and possibly boost mood. The manufacturer is reputable, but the price of the product is high.

The reviews for LeanFire offered a range of opinions. Some users really did lose a lot of weight, and were happy with the results. Others said it had little effect except to give them jitters from the caffeine. In addition, many customers found the supplement costly for the market.

This supplement contains a high amount of caffeine as well as other ingredients that could lead to side effects. If you experience unpleasant symptoms, discontinue the use immediately. Prior to taking this supplement, it’s important to go to a doctor and make sure it’s suitable for you.

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Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Consumer Health Digest. We do not verify or endorse any claims made in these reviews. Please read the full product reviews disclaimer. *All individuals are unique. Your results can and will vary.

Customer Reviews for LeanFire with Next-Gen Slimvance

Force Factor LeanFire with Next-Gen SLIMVANCE Reviews: Is It Safe?

Customer Reviews & Ratings

1.0 out of 5

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  1. K. Ancheta

    Causes jitters, nausea, and vomiting
    I ordered this through CVS. The first time I took this, I took two pills, and it wasn’t too long before I vomited. This made me extremely jittery and upset my stomach.

    I waited a week and took one pill today to see if I would have the same reaction, and my stomach is very upset. I will not retake this.

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LeanFire with Next-Gen Slimvance
Force Factor
120 Capsules
Guarana, Theacrine, Caffeine Anhydrous, and Niacin

10 sources

We review published medical research in respected scientific journals to arrive at our conclusions about a product or health topic. This ensures the highest standard of scientific accuracy.

[1] Coffee, Diabetes, And Weight Control:
[2] Nutrient Bioavailability: Nutrient Bioavailability - an overview | ScienceDirect Topics
[3] Guarana Supplementation Attenuated Obesity, Insulin Resistance, And Adipokines Dysregulation Induced By A Standardized Human Western Diet Via Brown Adipose Tissue Activation:
[4] Theacrine From Camellia kucha and Its Health Beneficial Effects:
[5] Niacin Increases Adiponectin and Decreases Adipose Tissue Inflammation in High Fat Diet-Fed Mice:
[6] Modulatory Effects of Guarana (Paullinia cupana) on Adipogenesis:
[7] Yohimbine: The Effects On Body Composition And Exercise Performance In Soccer Players:
[8] Caffeine Intake Is Related To Successful Weight Loss Maintenance:
[9] Efficacy and Safety of White Willow Bark ( Salix alba ) Extracts: Willow Bark Extract Efficacy and Safety:
[10] Anti-Obesity Effects Of Yerba Mate (Ilex Paraguariensis): A Randomized, Double-Blind, Placebo-Controlled Clinical Trial:

**This is a subjective assessment based on the strength of the available informations and our estimation of efficacy.

*Result may vary. If you are pregnant, nursing, have a serious medical condition, or have a history of heart conditions we suggest consulting with a physician before using any supplement. The information contained in this website is provided for general informational purposes only. It is not intended to diagnose, treat, cure, or prevent any disease and should not be relied upon as a medical advice. Always consult your doctor before using any supplements.

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