Best Fat Burners 2019 – A Buyers Guide To Fat Burners for Weight Management & Muscle Definition

Last updated on March 4th, 2019

Bet fat burners

Best Fat Burners 2019

Here are the best fat burning supplements for 2019 that are geared towards weight management (or weight loss for want of a better word) and fat loss for muscle definition and cutting.

Fat burners are THE most common and popular form of diet pills – they are suitable for both men and women who want to lose weight or use a supplement (cutting cycle) as part of fitness or workout regime.

Ask a dozen people why they want to use a fat burner and you’ll likely get a dozen different answers.

The following list, we feel, covers the best product for each major reason for wanting to use a fat burning supplement.

#1 PhenQ – Best Fat Burner for Men and Women

Who is it suitable for? Anyone who wants to lose body fat.

PhenQ is a great product. It is without gimmick, hype or hyperbole.

The people behind it have resisted the temptation to associate it with an ultra slim women in a bikini or an ultra fit ripped man in the gym – but make no mistake it is a powerhouse of a fat burner.

It has no celebrity endorsements, no catch phrase and no trendy new (largely useless) ingredients. And I absolutely love it.

Whether you need to lose weight or burn fat and retain the lean muscle mass PhenQ is ideal.

PhenQ real review

When I recommend this product I do so safe in the knowledge that customers will be buying a thoroughly researched product that offers value, is safe to use and will in most cases deliver what it promises.

PhenQ is a multi benefit diet product – what that actually means is that several mechanics of action are in effect.

PhenQ fat burner

It can do much more that just burn existing fat.

Most of the top products available have multiple benefits but PhenQ takes the concept to a new level.

  1. Fat Burner – contains Capsimax (capsicum, piperine, caffeine and niacin (vitamin B3)) A very effective thermogenic fat burning ingredient.
  2. Fat Blocker – blocks the potential for new fat by stopping the absorption of a percentage of the fat in your food from being digested by your stomach.
  3. Appetite Suppressant – stops the feeling of hunger, can prolong the feeling of satiety and reduce the need to snack
  4. Fight Fatigue / Tiredness – one of the biggest reasons why diets fail is the onset of fatigue and the need to snack on sugar laden foods

There is also a mild mood enhancing ingredient present. I must stress that the mood enhancing (nootropic) dosage is relatively small and is the only disappointing element of of the formula.

PhenQ has a 60 day money back guarantee. It is delivered all over the world (with a few notable exceptions) for free.

Bottom line – If PhenQ doesn’t help you lose weight it is highly unlikely anything else will.

#2 LeanBean – Female Fat Burner

Who is it suitable for? Women who want to lose body fat.

LeanBean is a fat burner and appetite suppressant intent for women.

In truth though, there is not many reasons why men cannot use it – the pink packaging maybe a deal killer for a majority of men though.

LeanBean real life review

The marketing of LeanBean is the exact opposite of PhenQ. LeanBean is Instagram, it’s Pinterest – it is a great looking brand and the people behind it know how to exploit demographic superbly.

The product itself is virtual perfection. It’s formulated and dosed correctly.

It is not just a fat burner though.

LeanBean fat burner for women

LeanBean can:

  1. Help to raise your metabolism and burn body fat. There is Turmeric and Cayenne Pepper to help boost your metabolism safely.
  2. Help to reduce cravings and suppress appetite using Glucomannan – arguable the most studied and cited hunger suppressant that has ever existed.
  3. Help to support your body’s natural balance with ingredients like Vitamin B and Green Tea

LeanBean has a 90 day money back guarantee.

#3 Instant Knockout – Cutting & Muscle Definition

Who is it suitable for? Anyone who needs a fat loss supplement for cutting body fat

Instant Knockout is squarely aimed at men and women who workout and want get a more chiselled and defined look.

It helps the fat loss process while preserving lean muscle mass.

It is ideal for virtually every physically active person: Bodybuilders, body conditioners, fighters, sportsmen, athletes.

Real review of Instant Knockout

It is manufactured by Roar Ambition, a company that sure knows how to promote their products – and why not they are responsible for some industry defining products.

Instant Knockout is distinctive due it fist shaped bottle and vivid red capsules. It is also distinctive by it’s use of some very good ambassadors:

  • Pro MMA fighter Diego Sanchez
  • The #1 MMA coach in the world, Greg Jackson
  • John Dodson – one of the top MMA Flyweights in the world

Greg Jackson MMA coach recommends Instant Knockout fat burner

Instant Knockout ….

  1. includes ingredients that are scientifically proven to work
  2. contains those ingredients at effective dosages

#4 Clenbutrol – Cutting Cycles / Stacking

Who is it suitable for? Anyone who needs a fat burning/cutting supplement. Great for stacking.

It’s probably a bit unfair to label Clenbutrol as number 4 as it has a specific target customer – namely the the bodybuilder/body conditioner (or someone who works out).

What Is Clenbutrol and Why Is It the Best Substitute for Clenbuterol?

Clenbutrol is from CrazyBulk – it was brought to the market as an alternative to Clenbuterol – a substance that has safety and legality issues.

Clenbutrol burns fat and improves cardiovascular performance by increasing oxygen transportation, enabling users to burn fat while retaining lean muscle mass.

  • Safe and Legal Clenbuterol Steroid Alternative
  • Powerful Fat Burning
  • Improves Muscle to Fat Ratio
  • Preserves Lean Muscle Mass
  • Provides a Ripped Physique
  • Boosts Performance
  • Enhances Stamina and Endurance
  • No Needles or Prescriptions
  • Delivers Results Within 30 Days
  • Free International Shipping

This article is for anybody who wants to learn more about fat burning and the best fat burners on the supplement market today.

Fat burners are THE most popular and common form of diet pill and for anyone intent on losing weight.

They usually contain other ingredients that help with other areas of weight los such as: appetite suppression and fat blocking.

This is for both men and women who want to lose weight, improve their health and burn fat – for anyone not just gym bunnies!

Losing weight will improve your health and give you life longevity!

If you want to jump back to the top selling and most effective brandsclick here  I will list the best fat burners for weight management available to buy and the justification in layman’s terms.

If you’re looking for advice on how to identify a good product, what to look for, and what to avoid, then this is the guide for you.

I’ll also highlight some of the industry’s best current ingredients, hopefully undercutting the inexperienced, and frankly incorrect, nonsense that pervades the internet.

What Are Fat Burners?

Fat burners mostly come in the form of capsule supplements now, though there are more and more powders (like fat-burning pre-workout supplements) hitting the market these days.

Some are expensive, some are dirt cheap. Most contain multiple ingredients in what is commonly referred to as a formula, while others contain only one compound.

There are stimulant based formulas and stim-free formulas, and certain inclusions can cause certain unwanted side effects.

A few of them even work. Most are a waste of money.

What every one of them is supposed to do, is reduce your quantity of body fat.

How Do Fat Burners Work?

There are a few ways in which fat burners and the ingredients they contain can trigger the biochemical processes in your body that ultimately lead to more fat being “burned” as an energy substrate.

A term you will most likely have heard in conjunction with fat burners and the like is “thermogenesis”.

What Is Thermogenesis and Why Is It Important?

Thermogenesis literally refers to heat production. In the context of the human body, it is essentially a metabolism regulating mechanism.

It is the process of converting nutrient calories – either those being consumed or those stored – into heat energy for the purpose of maintaining homeostasis, i.e. a stable temperature (thermoregulation), healthy metabolic function and weight control.

In basic terms, the body’s basic form of energy – ATP (Adenosine Triphosphate) – is used up in order to oxidize fatty acids as rapidly as possible. This ATP utilization generates heat, hence the thermogenic effect.

Once the process of thermogenesis finishes, the cell switches back to synthesizing and storing ATP.

Much of this is driven by the stimulation of beta-adrenergic receptors and the actions of UCP1 (Uncoupling Protein 1). If you want to jack into some more detailed science about the process at the cellular level then I recommend reading this review by Stohs and Badmaev

Thermic Effect of Food

Eating isn’t a one way energy system. It provides you with fuel but digesting your food requires some energy input as well.

The heat that comes from this process is called the thermic effect of food (or feeding/eating). It’s a significant amount to as it makes up between 5% and 10% of your total daily energy expenditure (TDEE).

Exercise Energy Expenditure

Your constantly utilizing energy or synthesizing its substrates and storing them. Your metabolic functions – those that keep you alive – are always using energy.

Exercise requires energy input above that, and again, the heat production from physical exertion needs no introduction as everyone has experience it.

Cold Exposure and Non Shivering Thermogenesis

As I mentioned, thermogenesis helps keep us warm amongst other things. When our external temperature drops below a certain point, our biological thermostat kicks into gear a process called non-shivering thermogenesis.

This involves a body tissue called Brown Adipose Tissue (BAT) or brown fat. It originates from the same stem cells as muscle tissue, and shares many of the same characteristics.

For one, BAT uses white fat (the body fat your want rid of) as fuel to increase body temperature. This activation of BAT is particularly useful when we are infants because, proportionally speaking, we have much more of it.

We also cannot shiver to generate heat when we are babies, so we rely almost wholly on BAT to warm us up.

As we grow older, our brown fat stores become less important but they still have an effect, and recent research shows that we can “brown” white fat cells to increase our stores of BAT.

What’s more, we can activate brown fat through intentional cold exposure or through the use of certain ingredients and supplements.

I’ll explain more about Capsaicin (capsicum/hot pepper) and Turmeric in a little while but these are two of the more powerful ingredients used to light up our BAT stores and torch unwanted white fat.

Adaptive Thermogenesis

Cold exposure and diet induced thermogenesis are examples of adaptive thermogenesis. It’s one of the mechanisms that starts to fail in models of obesity.

Thermogenic supplements fit into this category as well, and their use has become extremely popular.

Thermogenic Supplements – Fat Burners

There are two basic categories of thermogenic fat burning supplements:

  1. Stimulants
  2. Non-Stimulants

Stimulants are compounds which interact with the central nervous system (CNS) or the sympathetic nervous system (SNS).

A sort of over-arching rule is that to be called a stimulant, it must temporarily increase the activity or efficiency of the whole or part of an organism.

Many stimulants also have thermogenic effects because they interact with beta-adrenergic receptors. They should hence be referred to as thermogenic stimulants.

Caffeine Anhydrous is probably the supplement industry’s most utilized thermogenic stimulant. Ephedrine is one of the more potent compounds, which also happens to be banned in most places.

Synephrine is an example of a sympathomimetic. It is structurally similar to ephedrine but while it does have strong beta-3 and thermogenic effects, it doesn’t interact much with beta-1 and beta-2 receptors. As such it doesn’t have much of an impact on the CNS.

Thermogenic stimulants are popular because they have multiple short-term benefits in addition to fat burning, including improvements in energy, cognitive function and focus.

However, they can also have a few unwanted side effects, especially for people who are sensitive to them. Stimulants increase heart rate and can cause nausea, headaches, dizziness and a nervous energy commonly referred to as ‘the jitters’.

Stimulants can either bind directly to adrenergic receptors (e.g. b1, b2, b3) or they can influence them indirectly by boosting levels of noradrenaline (norepinephrine) and adrenaline (epinephrine) which then bind to the receptors themselves.

The most powerful stimulants do both. They trigger the increase of noradrenaline and adrenaline while also acting on the adrenergic receptors to induce further CNS effects and stimulate thermogenesis.

Non-Stimulant thermogenic supplements do not increase CNS or SNS activity but still work via beta-3 receptors and so can trigger a fat burning response.

Great examples are capsaicin, green tea, cayenne and turmeric and groups of ingredients include: flavanoids, isoflavanoids, polyphenols and carotenoids.

Perhaps the most interesting aspect of some non-stimulant thermogenics is their effect on brown adipose tissue and the ‘browning’ of white adipose tissue (WAT).

Effective Thermogenic Stimulants

There are a number of stimulants which induce thermogenesis and thus fat burning. Some have less of an impact on the CNS than others and therefore have less associated effects, such as increased heart rate.

Caffeine Anhydrous

Caffeine is the most common stimulant in the world, owing to the fact that it is found in coffee and tea.

It’s main action is to increase levels of cyclic adenosine monophosphate (cAMP) which is a key intermediary in the cellular energy cycle. In tissues where cAMP is increased (adipose, brain, muscle, organs) the efficiency and activity of that tissues increases.

Caffeine – How to use it properly and get the results

One of caffeine’s mechanisms is to stimulate the release of CNS neurotransmitters, which further increases metabolic turnover, energy and cognitive function.

Make no mistake, caffeine is a potent ingredient but it must be used correctly in order to get the best results from it.

Habitual caffeine use (e.g. two/three cups of coffee per day) will lead to an insurmountable tolerance, where no increase in dosage will bring benefit (and will only increase negative side effects).

Once tolerance has set in, which can happen at around 8 to 12 weeks depending on the individual) it is best to reduce intake over a few days and then cycle off it completely for a couple weeks.

This will reset the body’s tolerance and allow it to once again feel the benefits.

For more information on caffeine, how to use it, how to cycle it and what it can do for you, click here


Yohimbine is a powerful molecule which acts as both a beta-agonist (activates bet-adrenergic receptors) and an alpha-antagonist (suppresses alpha-adrenergic receptors).

Beta-agonists include all of these thermogenic fat burners, whether they are stimulatory or not, because they trigger their effects through b1, b2 and/or b3 receptors.

The beta-adrenergic receptors are associated with lipolysis (breakdown of fats), whereas the alpha-adrenergic receptors suppress fat burning.

By acting as an antagonist on alpha receptors, Yohimbine basically blocks their suppressive effects on the breakdown and metabolism of fats.

Perhaps of most interest to people looking for a potent fat burner is the selectivity yohimbine has for alpha-2 receptors which appear to accumulate in the thigh area in women due to estrogen effects.

This means that yohombine could be one of the only fat burners with the ability to effectively target stubborn areas of fat in women. More research is required to confirm this.

While it is a promising ingredient in the context of fat loss, yohimbine can induce anxiety in people who are predisposed to it.

It can even cause panic attacks in those susceptible. What’s more, yohimbine interacts with neurological medications, including certain anti-depressants.

Should you consider using yohimbine, it is wise to make sure you are not taking any medication with which it can interfere and if you suffer from anxiety, panic attacks or depression it is probably better to steer clear.

After checking all of that, if you are still up for it, then it is recommended to start with a very small dose in order to assess your tolerance level. When it is taken in conjunction with other stimulants, or even non-stimulant beta agonists the effects can be increased.

Effective Non-Stimulant Thermogenics

Some of these may still have a small effect on the CNS but the impact is negligible and so they cannot be considered stimulants.

Synephrine – Citrus Aurantium – Bitter Orange extract

Synephrine is a compound present in bitter orange fruits, otherwise known as Citrus Aurantium.

You may have seen, used, or heard of the industry standard branded extract called Advantra-Z.

It binds to the beta-3 receptors of cells which as explained above are those which trigger the breakdown of fats and their subsequent metabolism.

Interestingly, synephrine can also increase glucose uptake into muscle cells and increases glycogenolysis (breakdown of stored glycogen to glucose for energy use), gluconeogenesis (production of glucose from non-carb sources), glycolysis (breakdown of glucose) and even oxygen uptake.

Hesperidin and naringen are two citrus bioflavanoids that are often found alongside synephrine in multi-ingredient fat burners. They have been shown to enhance one another’s thermogenic effect.

Synephrine is also synergistic with caffeine, especially in people who have reset their caffeine tolerance.

Capsaicin – Hot Chili Pepper Extract

Capsaicin might be included in a fat burner product in the branded form called CapsiMax, which applies a special time-release coating the powdered chili pepper so that it gets to the right part of the intestine and has maximum effect.

The main bioactive compounds in hot red peppers are called capsaicinoids and capsiate, the former being pungent and the latter being non-pungent.

capsicum and capsimax

Most research has been carried out with capsaicinoids but capsiate has very similar effects.

Capsaicin can increase fat burning via the activation of BAT and the browning of WAT. The browning of WAT creates what has become known as ‘brite’ fat or beige fat – somewhere in between brown and white, in essence.

This process enhances the concentration of cellular mitochondria in an area of white fat and thus increases the fat burning potential.

Capsaicin also acts as an appetite suppressant and a vasodilator, i.e. the relaxing of the smooth muscle which lines the walls of blood vessels, allowing for greater blood flow and oxygen deliver.

The combination of all of these benefits makes capsaicin one of the must-have fat burning, and overall health, ingredients to look out for in a product.

Green Tea – EGCG

Green tea contains bioactive molecules called catechins, which include EGCG – or epigallocatechin gallate – the most abundant and possibly most potent of them.

A cup of green tea contains a moderate quantity of EGCG but a green tea extract standardized to a specific amount of the molecule, at a strong dosage, can do a lot more.

When included alongside caffeine, green tea works especially well because it actually inhibits the enzyme that degrades catecholamines (most notably norepinephrine/noradrenaline), which stimulants like caffeine trigger the release of.

Green Tea – EGCG, Powerful with Caffeine – Blocks the Breakdown of Adrenaline

By slowing the degradation rate of catecholamines, they can continue to stimulate the beta-adrenergic receptors and thus prolong the oxidation of fat.

Green tea can have this effect in isolation because it also contains caffeine, although the quantity can vary from one extract to another.

Most quality fat burning products will contain both a green tea extract, standardized to a quantity of EGCG, plus a caffeine anhydrous inclusion.

Turmeric and Curcumin

Curcumin is the active component of turmeric and has been shown [source] to induce the browning of white adipose tissue (WAT) whereby the cells develop more mitochondria, which can in-turn burn more stored fat.

Adding black pepper to turmeric increases its absorption significantly and the two ingredients should therefore always be included together.

Forskolin from Coleus Forskohli

Coleus forskohli is a herb which contains a bioactive compound called forskolin.

Forskolin indirectly increases fat burning activity by stimulating the release of cAMP but without stimulating the CNS to a noticeable degree.

Forskolin Fat Burner Testosterone

Forslean is the most well known branded standardized extract of Forskolin.

Green Coffee Extract and Chlorogenic Acid

Green Coffee Bean extract has become a very popular weight management supplement and much of it is down to the initial successes of its main active component, chlorogenic acid, in scientific studies.

Chlorogenic acid is mostly associated with a reduction in glucose absorption from eating which results in weight loss [].

However, other research [] indicates that chlorogenic acid probably has a fat burning effect independent of the carbohydrate blocking.

Chlorogenic acid can inhibit the enzyme which deactivates cAMP, which results in an increase of AMPK.

AMPK (adenosine monophosphate activated protein kinase) is an enzyme which can be considered a metabolic lever – i.e. when it is activated it plays a central role in energy metabolism and homeostasis.

The metabolic lever is catabolic, and involves the breaking down of fats to be burned.

Green coffee bean extract is a multi-faceted fat burning ingredient which does not cause any negative side effects.

Guide to Fat Burners 2019 – Wrapping Up

Many fat burners contain a lot of ingredients these days. Some products have lengthy formulas on their labels, detailing all kinds of inclusions from mood boosters to physical appetite suppressants.

The products above are excellent examples of the best fat burners to buy for 2019

But the essence of a fat burner, and arguably the most important ingredients they contain are thermogenic compounds.

The heat energy that these cause to dissipate from the body’s cells puts the “burn” into fat burner.

I’ve discussed how the process works, and introduced some of the best ingredients in the business.

Hopefully this article can help you choose the best fat burners for 2019 and the best supplement  that will work for you.

Back to best fat burners – top products

About Eloïse Bel 11 Articles
Certified holistic nutritionist, B.A. in communications (journalism) and specialist in weight loss. I've been writing for 10 years on how to use nutrition to live healthy and for as long as possible. I embrace a holistic approach to nutrition, not only through the preparation of menus, but also through lifestyle changes and emotional support for achieving goals. You can also read more About Me.

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