Best Fat Burners – The Most Effective We’ve Found

Editor’s Note: This list has been updated to contain only the most effective fat burners available in 2018. Product #1 is our recommendation (as results are guaranteed), but any product in this roundup is great – happy reading!

If you’re going to buy a fat burner pill, you undoubtably want to buy one that actually works. With the weight loss industry being worth multiple billions worldwide, the market sees new fat burner pills pop up almost on a daily basis – all of them claiming to be “the best”.

As there are literally thousands of products to choose from, selecting an effective one has actually become somewhat of a difficult task.

With more and more useless, ineffective and/or dangerous fat burners flooding the internet, shopping smart and being an informed consumer has never been more important.

In order to help guide you towards a safer and more effective purchase, the DietProbe team has analyzed and reviewed thousands fat burners products – from their hard work comes the following top 10 fat burners list.

Any product on this list is a fantastic choice, in our opinion.


    Top 10 Fat Burners - Ranked On Effectiveness

    Position: Highlights:
    1.Thermaxin Product Image
    Thermaxin is a powerful 2-per-day fat burning complex created by Astral Nutrition.

    We have placed this product at the very top of our best fat burners list because it’s a perfect choice for anybody who is looking for rapid weight loss loss results.

    After carefully researching the formula powering Thermaxin, we found that this product uses cutting-edge, clinically proven ingredients in all the correct doses.

    Thermaxin works by boosting the user’s metabolic rates, which allows the body to expend calories more rapidly (i.e. the product makes you burn calories significantly faster than normal). With your body burning calories at a faster rate, it goes without saying that you’ll start to lose weight faster too.

    Often those who find it difficult to lose weight have slow metabolic rates, which can make losing weight significantly harder (and sometimes even impossible) – by adding two servings of Thermaxin into your daily schedule, you’ll be turbo-charging your metabolism speed and forcing your body into a fat-burning state.

    Furthermore, this product is designed to naturally suppress appetite and reduce the user’s sugar cravings, due to the blood sugar balancing ingredients it contains.

    Finally, this product contains a whole host of energy-boosting ingredients that can both help fuel your workouts and improve your focus and concentration. Many people who are dieting regularly experience what is known as “diet fatigue”, which is a lethargic state where you feel constantly tired and your mind isn’t as sharp – Astral Nutrition have realized this and formulated their Thermaxin fat burners to directly address the issue.

    Thermaxin certainly isn’t the cheapest out there, but the price tag isn’t ridiculous either. We like how Astral Nutrition offer a full 30-day money-back guarantee too. Finding the product isn’t difficult at all; it’s available direct from Astral Nutrition themselves, via Amazon, eBay and is also in most supplement stores nationwide.

    The bottom line: if you’re looking for a fat burning product that simply works, this is very likely your best choice. Thermaxin uses clinically proven ingredients, won’t produce any negative side effects and is backed by science – and with a money-back guarantee you haven’t got anything to lose in our opinion.

    Rating: (5/5)

    Thermaxin Review

    2.Lipozene Product Image
    Lipozene is a fiber-based weight management pill developed and manufactured by Obesity Research Institute.

    We have featured this product in the second position of our top 10 fat burners list because, after some research, we found that this product is highly effective for supporting weight loss.

    If users follow the directions of usage correctly, we don’t see why Lipozene wouldn’t be consistent in delivering great weight loss results.

    The most important thing to note about Lipozene is that it’s a 1-ingredient product - it contains a clinically proven expansive fiber named Glucomannan, which has been shown to support weight loss when taken prior to your three daily meals.

    Lipozene works by swelling up inside the stomach, which in turn causes you to naturally want to eat less food, as there’s less space inside your stomach (temporarily of course). With sustained usage, users can typically expect to see slow and steady weight loss, as these pills will just naturally cause you to consume less calories each day.

    Furthermore, Lipozene is a great product for those who have a high appetite. A very useful quality of Glucomannan is that it produces a natural feeling of fullness, which can help to support you along with a calorie-restricted diet plan (after all, nobody likes feeling hungry all the time).

    Finally, this product is very unlikely to produce any negative side effects, as it’s stimulant-free and only uses a natural plant fiber. The only people who shouldn’t use this product are those with abnormalities of the esophagus or gut.

    This is a very accessible product too. Lipozene is available in most stores and of course via their official website, so you shouldn’t have too much trouble getting your hands on it.

    The bottom line: Lipozene is a stimulant-free fat burner that we believe can genuinely help users lose weight if they use it in the correct manner. It’s not too expensive and won’t produce any negative side effects, making it very user-friendly.

    Rating: (5/5)

    Lipozene Review

    3.Slimvance Core Slimming Complex Product Image
    Slimvance is another heavy-hitter in the fat burner market. This powerful fat burner is created by a company named BodyDynamix and distributed by the supplement retailer powerhouse GNC.

    Slimvance finds itself in position #3 of our best fat burners roundup because it’s simply just a great weight management pill all-round.

    The formula contains a whole host of metabolism-boosting stimulants, which is why it is so effective for the purposes of losing weight. By taking the Slimvance Core Slimming Complex daily, the ingredients may help to stimulate the user’s central nervous system, causing the body to expend calories at a faster rate than it otherwise normally could. When used in conjunction with a calorie-restricted diet, this can lead to faster weight loss than normal.

    Another awesome benefit to using Slimvance will be the enormous surges of energy the product will likely provide (unless you have some sort of massive tolerance to stimulants!) – with more energy, you’ll be able to work harder in the gym and push your performance to the next level. This same effect will also help counter any diet fatigue that may arise when you start to lower your daily caloric intake.

    Finally, the product may also help improve your cognitive performance by improving your focus and concentration – again, due to the stimulant content.

    As we mentioned earlier, Slimvance is available at most GNC stores, making it easy to find. It’s definitely not the cheapest product on the market, but we believe you’re certainly paying for quality with this one.

    The bottom line: this is just another rock solid fat burner that does everything a product like this should do. It’ll help spike your metabolic rates, boost your energy levels and ultimately puts you in a great position to burn off that excess body fat.

    Rating: (5/5)

    Slimvance Review

    4.Bio X4 Product Image
    Bio X4 is unlike any other other supplement on this list – it’s something that the manufacturers Nucific claim to be a “weight management probiotic”.

    We have placed it at #4 because we believe this is a great fat burner for anyone who’s looking for results.

    Firstly, this product is in our best fat burners list because it’s been formulated a medical professional named Dr. Amy Lee.

    In Bio X4 we essentially have two products in one – Dr. Lee has essentially merged a probiotic supplement with a fat burner supplement, and in doing so has created something very unique.

    The Bio X4 formula features a fully-dedicated weight management complex, consisting of various natural stimulants and herbal extracts, designed to help increase the user’s metabolic rates – with a faster-running metabolism, users may be able to start burning calories at a faster rate than they otherwise could (when combined with a low calorie diet, this can obviously lead to faster weight loss than normal).

    Another very useful trait of Bio X4 is that it has a whole host of general health benefits too. The probiotic ingredients inside the formula will help support the user’s gut health and can also aid in digestion.

    As Bio X4 is meant to be used while sticking to a low calorie diet, “diet fatigue” can be a real issue, luckily ingredients inside this product can help naturally elevate your energy levels, which can stop you from feeling tired and sluggish, and can actually help support your gym and training routine.

    You’ll not be able to find this product anywhere other than the Nucific website, but from what we’ve gathered, they’re a very trustworthy company and have a good reputation. The price of Bio X4 is somewhat high, but as it’s basically a 2-in-1 product, we don’t think it’s too bad for what you’re actually getting.

    The bottom line: this unique fat burner pill offers consumers something they probably won’t find anywhere else; it’s a probiotic and fat burner rolled into one. It’s unlikely to produce any side effects, has been formulated by a medical professional and even comes with a 90-day money-back guarantee, which is always reassuring to see.

    Rating: (5/5)

    Bio X4 Review

    5.LeanFire XT Product Image
    Leanfire XT is Force Factor’s flagship fat burner pill, and has been an Amazon and GNC best-seller for several years now.

    Leanfire finds itself in position #5 of our best fat burners list because it uses max-strength ingredients and is a great choice for the hardcore gym-user. After some further research, we believe this product is a rock-solid fat burner that’ll likely help the majority of those who use it lose some weight.

    Firstly, this product is absolutely loaded with stimulants and herbal extracts that can potentially help stimulate the user’s metabolic rates. With a faster-running metabolism, there’s a chance that users will start to burn calories at a faster rate than normal (which can of course lead to faster weight loss, provided you’re sticking to a calorie-restricted diet).

    As you’d expect with any stimulant-based fat burner, this product is also able to significantly boost your energy levels, which can fuel your gym sessions and help you push yourself further – the stims inside Leanfire XT can help reduce your perceived rate of exertion, which essentially means it’ll take longer for you to feel tired and exhausted.

    Finally, Leanfire XT contains natural cognitive-enhancing ingredients that can help improve your focus and concentration – again, a very useful effect for those who are actively training.

    Force Factor products are very easy to locate (stocked in most good supplement stores) and they don’t cost the earth either.

    The bottom line: this is a fat burner for the more advanced user. If you’re looking for a more hardcore product that’s perfect for someone who regularly trains or leads an active lifestyle, Leanfire XT is a great fat burner pill to pick. The product uses a very potent formula and may produce some negative side effects, but as we said, this isn’t a product for a newbie.

    Rating: (4.5/5)

    LeanFire XT Review

    6.Phentaslim Product Image
    Phentaslim is a weight loss / appetite management formula produced by Optimum Nutra.

    We have put Phentaslim in position #6 of our best fat burners list because of its great reputation within the industry (winning the backing of a popular supplement watchdog) and robust formulation.

    The most important thing when it comes to any fat burner is whether or not the ingredients are actually helpful for contributing towards weight loss, and with Phentaslim we can genuinely say that the product will help users lose weight.

    The formula contains a whole host of natural stimulants that can help speed up users’ metabolic rates, thus potentially triggering a faster rate of caloric expenditure (i.e. taking Phentaslim may help your body burn calories faster than normal).

    Furthermore, Phentaslim contains a complex of vitamins and minerals that can help contribute towards your general health. Often, when you’re dieting you’re not always getting 100% of your daily required vitamins – Optimum Nutra have recognized this and filled their fat burners to the brim with health-boosting vitamins and minerals.

    Finally, certain ingredients inside this product may help curb your appetite for a short period of time too (though it’s definitely not going to be as effective as a fully-dedicated appetite suppressant pill).

    Like you’d expect from a good fat burner, Phentaslim also has the ability to boost the user’s energy levels significantly. We always recommend that people who use these types of products should be regularly working out and/or doing cardiovascular activity; for a lot of people, this can seem like a chore, but we believe that the energy provided by Phentaslim will make the task a lot more bearable.

    The bottom line: despite having a slightly misleading name (no, there is no phentermine inside this product), Phentaslim really does appear to be a useful product for anyone looking for support with their weight loss. It’s probably not going to cause any negative side effects, it’s reasonably affordable and comes with a money-back guarantee to boot.

    Rating: (4.5/5)

    Phentaslim Review

    7.Alli Product Image
    Alli is another unique weight loss supplement that is manufactured by the pharmaceutical giant GSK (GlaxoSmithKlein).

    The reason Alli is found in our top 10 fat burners list is because it uses a clinically proven active ingredient named Orlistat (though, not in as potent a dosage as the Orlistat doctors can prescribe obese patients).

    Alli works by reducing the amount of fat the user can absorb from their food. This means that you’ll not be getting 100% of the calories from the food that you eat, instead much of the fat content will be passed straight through your digestive tract without being broken down for energy.

    Unlike most other fat burner pills, Alli doesn’t contain stimulants, it doesn’t boost metabolic rates and it doesn’t suppress your appetite – Alli is simply designed to help you lower your daily caloric intake with minimal effort.

    When Alli is used with a low-calorie diet plan, users can typically expect to see faster natural weight loss than they otherwise normally would.

    It goes without saying that Alli has a great reputation within the weight loss supplement industry, as it’s manufactured by one of the biggest pharmaceutical companies in the world, and has had significant clinical trials conducted on it.

    Alli is very easy to find (being present in most supplement stores and pharmacies) and it’s very affordable. It’ll likely not produce any unpleasant side effects and it shouldn’t really interfere with your lifestyle in any way.

    The bottom line: it’s a product that is backed by clinical trial, with an extremely reputable manufacturer. While it’s not the most potent or hardcore fat burning pill out there, if you’re just looking for helping hand towards your weight loss goals, Alli is a good option.

    Rating: (4.5/5)

    Alli fat burners Review

    8.Fitmiss Tone Product Image
    Don’t let the brand name fool you, this one isn’t just for the ladies! FitMiss Tone is a strong fat burner produced by MusclePharm (but branded under their female-oriented brand FitMiss).

    Tone finds itself in position #8 because it’s a very useful fat burner that will likely produce good results for most users, whether they be male or female.

    Unique to this list is that Tone doesn’t actually contain any stimulants or caffeine at all – it is essentially just a CLA 1000mg softgel, but that in no way holds the product back.

    CLA (conjugated linoleic acid) is a natural substance that studies have shown can help to shrink fat cells.

    MusclePharm are a very well respected supplement manufacturer and their products (including the FitMiss range) can be found in most good supplement stores. Another great thing is that Tone isn’t really expensive at all – as CLA isn’t an expensive ingredient.

    The bottom line: this CLA-based fat burner can help you reduce your body fat percentages if you use it with a low calorie diet and regular exercise. While it doesn’t contain any stimulants or energy boosting ingredients, it can still help you towards your weight loss goals for sure. Tone is also unlikely to produce negative side effects, making it a good supplement to use if you’re just starting out with weight management products.

    Rating: (4.5/5)

    FitMiss Tone Review

    9.Hydroxycut Hardcore Product Image
    Hydroxycut is arguably one of the most successful lines of fat burners to have ever existed! The Hydroxycut Hardcore fat burner pill, as the name suggests, is the most potent of the range and ranks at position #9 on our best fat burners list.

    As you’d expect with any “hardcore” fat burner, this isn’t a product for the faint of heart – Hydroxycut Hardcore is certainly targeted towards the more - dare we say it - “hardcore” fat burner user.

    The formula is loaded with powerful stimulants, amino acids and a huge amount of caffeine – all intended to elevate the user’s metabolic rates, thus triggering a faster rate of calorie-expenditure (i.e. this product is meant to cause your body to burn calories at a faster rate).

    Furthermore, Hydroxycut Hardcore is very likely to give you soaring energy levels, which will both counter diet fatigue and help you push yourself much further in your workouts (due to the ingredients reducing your perception of exertion) – with more energy, you’ll be able to work harder and burn more calories in the gym too!

    Like most products on this list, Hydroxycut Hardcore can be found in the weight management isle of most supplement stores and supermarkets, but it’s also available directly from Hydroxycut themselves.

    The bottom line: this is a very potent fat burner that isn’t for those new to fat burner pills! It’ll help boost your metabolism, spike your energy levels and can also help improve your athletic performance. If you’re a veteran of these types of products, then Hydroxycut Hardcore is a very good choice, but if you’re totally new to fat burners, then you may experience some negative side effects from the powerful stimulants inside it.

    Rating: (4/5)

    Hydroxycut Hardcore Review

    10.Dietspotlight Burn Product Image
    Burn is a popular fat burner produced by Greenbracket LLC and marketed by the popular supplement review website DietSpotlight.

    We have featured Dietspotlight’s Burn in position #10 of our best fat burners list because of its excellent formula.

    Burn effectively combines a scientifically-proven weight loss ingredient named Meratrim (a proprietary blend of Sphaeranthus Indicus and Garcinia Mangostana) with a complex of natural stimulants and chromium, to ultimately form a very effective fat loss formula.

    Studies have shown that taking the Meratrim proprietary blend daily (in conjunction with a low calorie diet that doesn’t exceed 2000 calories per day) helped users lose three times more weight than those who were not taking the blend, over a period of 8 weeks.

    While it’s not overly-potent, Burn also contains enough caffeine and green tea extract to help spike the user’s metabolic rates and energy levels – both effects being extremely useful for anybody who’s looking to shake off some excess fat.

    This is another product that isn’t exactly cheap, but we believe that for what you’re getting it’s a pretty good deal. Dietspotlight also offer a guarantee for dissatisfied customers, so you’re protected if you don’t happen to find it effective.

    The bottom line: this is a product that uses ingredients backed by science and clinical study, as any good fat burner should. It’s not a ultra-potent fat burner like many others on this list, but it’s definitely a great starting point for anyone who has never tried such products before. It’s unlikely to produce negative side effects and only contains mild amounts of caffeine.

    Rating: (4/5)

    Dietspotlight Burn Review


    What do we deem to be a good fat burner? Our reviewers look at four key aspects of a product to determine an overall rating out of ten.

    These aspects are:

    1. Price – When we look at a fat burner, the first thing we look at is the price per bottle and how long that bottle will last a user. Typically one bottle of fat burners will last the user 30 days. In our opinion, the price should directly correspond with ingredients used, it’s fair to say that a fat burner that used expensive, premium ingredients would cost more than a product that simply uses cheap and lower quality ingredients.
    2. Ingredients Used – Unfortunately the fat burner industry is full of scammers, liars and cheats who sell customers nothing more than a sugar pill while promising incredible weight loss results. The most important factor in what makes the best fat burners is of course the ingredients used – once you put pretty packaging and clever marketing schemes aside customers ultimately just want quality weight loss results. We always analyze ingredients with a fine-tooth comb. Not only do we look at the ingredient selection, we also closely look at the amounts used. It’s not unusual for shady manufacturers to use an expensive ingredients in tiny, ineffective amounts just so their ingredients list can look more impressive.
    3. Scientific research – We compare what the manufacturers claim against published, independent scientific research in order to validate the products ability and effectiveness.
    4. Manufacturer reputation – Finally, we look at the manufacturers themselves. As previously stated there are a lot of less-than-reputable fat burner manufacturers out there, all claiming that their product is the best. We do our best to dive into customer feedback and other online reviews to give a clear insight into what the after-sales support is like. We also look to see if the company has any outstanding legal action or has had historic legal action taken against it.

    Fat Burner FAQ

    Below you’ll find a list of the most commonly asked questions. If you don’t find your answer you can always drop us an email!


    Q. Are Fat Burners Safe?

    Answer: The answer to this question depends on your choice of product. There are products out there that are very unsafe, likewise there are products that are completely safe (like those in our top 10 list).

    In order to spot a safe fat burner, you should do the following:

    • Check that the manufacturer adhering to good manufacturing practices and not using any banned or deemed-dangerous ingredients within the formula.
    • Stick to the set directions of usage and don’t exceed the serving size. Even the safest fat burner pills in the world will cause adverse effects if you were to consume more than the set dosage.

    Q. Do Fat Burners Make You Sweat?

    Answer: Fat burners can make you sweat more than usual but it’s usually only noticeable during exercise.

    If you’re planning on using fat burner pills to lose weight without exercise you’ll probably not really notice any major different.

    The increase in sweating comes from the ingredients boosting your metabolism which in tern raises your body’s core temperature – this increase in temperature is what can cause sweating.


    Q. Do Fat Burners Work With No Exercise?

    Answer: Fat burners will work without exercise as long as you’re still restricting your daily calorie intake.

    Remember, the fat burner pill is going to help your body burn more calories than it normally could without them.. but if you’re still eating hundreds or thousands of calories more than your body’s daily requirement you’ll not see any results.

    If you exercise while using fat burner pills you’ll just burn even more calories and lose weight even faster.


    Q. Do Fat Burners Burn Muscle Mass?

    Answer: Fat burners do not ‘target’ or ‘burn’ muscle, that is a rumor. Fat burner pills also do not prevent muscle growth.

    Muscle-loss while dieting can potentially happen (due to your lowered calorie intake), but for the most part, your body is going to burn its excess fat storages long before it starts burning muscle.


    Q. What Are The Fat Burner Side Effects?

    Answer: It’s hard to say what side effects you may experience while using fat burners because it’s so highly dependent on the ingredients used in the product in question.

    With that being said, the most typical side effects of fat burners stem from the stimulant content of them (the stimulants are what cause the metabolism-boost). These can include:

    • Jitters
    • Restlessness
    • Insomnia

    Kath Ross, PhD
    Health Editor at DietProbe
    Kathryn is a Ph.D Health Editor here at DietProbe. She specializes in diabetes and weight control research and in her spare time she's a professional cat lady and wine connoisseur!