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Best Fat Burner for Men

Check out our top 7 picks to help men burn fat and get fit in 2023.

Last Updated: Dec 27, 2022
Best fat burner for men

Everything from diet and lifestyle to genetics can influence how we create and store fat. Modern society does a pretty good job of ensuring that the foods we eat and the exercise we get (or don’t get) are sufficient to create an obesity crisis. So, what else can you do if you don’t have the genes to keep you effortlessly trim?

This is where thermogenic fat burners come in. They provide the body with several ingredients that clinical studies show can stimulate the body to burn more fat. There are many options among fat burners, and figuring out which would best suit your needs can be a chore.

That’s why we created this guide, so you can evaluate only the best fat burners for men the market has to offer. Read on for our top seven picks.

If you’re pressed for time, here’s a look at our favorite fat burners for certain needs:

Summary of recommendations

Our Top Choice

Animal Cuts

Animal Cuts offers effective fat burners that include quality ingredients in high dosages.

Animal Cuts is a trusted name in the bodybuilding world. They offer their fat burner in both capsule and powder form. Choose between three different flavors, and receive free shipping for orders over $89.

How we evaluated thermogenic fat burners

Fat burners must work safely and not cost you an arm and a leg. We’ve developed a handful of essential criteria to compare these products and ensure you get results.


Winner: Animal Cuts

Animal Cuts is a cut above the competition in terms of effectiveness, thanks to its sheer number of ingredients and their doses. A careful look at the label reveals a supplement with targeted mixes designed to help you cut fat, increase energy, gain focus, shed water weight, and more. Our testers found the pill form to be most effective, as the powder form has a significantly different albeit still effective ingredient profile. EVL ENGN SHRED was a runner-up here with its impressive ingredient list, but Animal Cuts is the way to go if the only thing you care about is getting results.



For its high efficacy and low cost, EVL ENGN SHRED takes this category easily. Of course, we look at more than just the price of the bottle itself when considering how much it will ultimately cost you. Even the cost per day doesn’t paint a complete picture. Old School Labs Vintage Burn offers the same cost per day as EVL ENGN SHRED, but the latter provides a more complex and effective supplement.


Winners: Hunter Burn and Old School Labs

In evaluating the safety of a given fat burner, we looked first for ingredients with enough clinical studies behind them to support a low side effect profile. We also looked for supplements with shorter ingredient lists overall to minimize the potential for an adverse reaction. Both Old School Labs Vintage Burn and Hunter Burn offer short lists of safe, natural, and effective ingredients. Hunter Burn’s list is shorter compared with Old School Labs, but there are more botanical ingredients in the latter, and Hunter Burn is significantly more expensive.

There were a few options out there that we eliminated from contention — not just to win the safety evaluation but to be included in our guide at all. That’s because they include two controversial ingredients we found too dangerous to recommend in any form: clenbuterol and Bitter orange.

We’ll have more information on these ingredients below, but you can rest assured that none of the supplements we recommend here contain them.


Winners: EVL ENGN SHRED and Old School Labs Vintage Burn

A lot of fat burners out there require you to take large handfuls of enormous pills multiple times per day. That’s particularly inconvenient if you have difficulty swallowing pills. We have a tie in this category because we wanted to give the laurels to the best powder supplement and the easiest pill regimen to take. EVL ENGN SHRED beats out Animal Cuts Powder because you only use it as a pre-workout, so most people will need to take it just once per day. Animal Cuts has you taking their powder before breakfast and lunch.

Among capsule supplements, Old School Labs Vintage Burn has the smallest number of pills at just two per serving. You still need to take them twice per day, but the smaller pill quantity is an undeniable convenience.

How our top recommendations compare

  Cost (one bottle) Cost per day Noteworthy ingredients
Animal Cuts $44 $2.10 Caffeine, DMAE, ashwagandha
Animal Cuts Powder $41 $1.95 Carnitine blend, choline, tyrosine
EVL ENGN SHRED $40 $1.33 Beta-Alanine, choline, CLA
Hunter Burn $80 $2.67 Vitamin D3, glucomannan, capsicum
Old School Labs Vintage Burn $40 $1.33 Raspberry ketones, Garcinia fruit extract, chrysin
Instant Knockout Cut $65 $2.17 Vitamin D3, glucomannan, capsicum
Burn Lab Pro $60 $2.00 Forskohlii, cayenne pepper, HMB
Prime Shred $50 $1.67 Cayenne pepper, rhodeola rosea, vitamin B complex

How do fat burners work?

The fat burners in our guide are often referred to as thermogenic fat burners, a term that relates to fat cells’ ability to release energy as heat. They work by increasing your body’s natural fat-burning tendencies. Many ingredients achieve this effect in specific ways, with some boasting more clinical evidence than others. Let’s look at some of the most common ingredients in these fat burners to see how they might work.


This analysis of 90 trials shows that capsicum — a common fat burner that causes the spicy kick in peppers — creates an average additional energy expenditure of 50 calories per day. That adds up to about five pounds per year of fat loss in addition to the effects of diet, exercise, and any other ingredients in your fat burner.


This study discusses how choline initiates fat metabolism and does so in a way that can tame appetite. Choline can also function as a potent antioxidant, making it an especially healthy addition to any fat burner.


In a particularly thorough four-way crossover study, just 50mg of caffeine was enough to instigate a 6% increase in thermogenic response. Most thermogenic fat burners offer several times that amount.

Green tea extract

While caffeine is generally associated with fat burning, this study argues that green tea specifically targets brown adipose tissue more effectively than caffeine alone.

Green coffee bean extract

Studies into green coffee tend to produce mixed results, with some researchers raising methodological questions. Others, like this one, appear more promising and indicate a noteworthy effect on body fat.

Garcinia cambogia

While it’s often associated with its ability to prevent fat accumulation, studies show that garcinia cambogia can help you shed visceral and subcutaneous fat over several months.


Manufacturers don’t include theanine for its fat-burning effects. Rather, it serves to take the edge off caffeine present in a supplement, thanks to its soothing abilities.


Not only can taking carnitine help with weight loss, but it’s also an outstanding option if you’re trying to preserve lean muscle mass. Look for a supplement with carnitine if you’re cutting between bulking periods.


Like carnitine, you’ll find beta-alanine in fat burners intended for fitness enthusiasts. Studies show that it can give you a little more power to get through additional reps in the gym.


If you want to start exercising to help you reach your weight loss goals, you might consider a supplement with tyrosine in it, which has been shown to improve exercise tolerance among non-athletes.


Often derived from konjac root, glucomannan is a concentrated form of fiber. In a fat-burning supplement, it helps create a feeling of fullness, so you’re less likely to overeat or snack between meals.

Forskohlii root

More than burning fat, forskohlii appears to help prevent its accumulation. That can come in handy if you have one too many cheat days while still taking your supplement. Anecdotal evidence suggests it may also boost testosterone, but further research is needed.

Grains of paradise

Grains of paradise perform well in studies looking at the mobilization of brown adipose tissue. It’s a somewhat underused ingredient, especially given its apparently low side effect profile.

Dangerous fat-burning ingredients

Our research revealed certain ingredients sometimes present in fat burners that we strongly advise our readers to avoid. These components are particularly hazardous to those with heart or blood pressure issues.

Here’s a quick look at each:


This drug is intended for asthma patients, but bodybuilders often abuse it for its ability to enhance performance and help with fat loss. Unfortunately, it can cause heart palpitations, tremors, and even cardiac arrest.

Bitter orange

You might also see this ingredient listed as Citrus aurantium. It effectively helps with weight loss but also contains a compound the FDA banned for safety reasons. Side effects include heightened pulse, increased blood pressure, and stroke.

Who should take a fat burner?

Fat burners are a nice addition to a regimen of diet and exercise for those who struggle to lose weight even when they abide by a specific program. They can help those genetically predisposed to store more fat and those with hormonal imbalances that affect their body composition.

Fat burners are also great for athletes and bodybuilders who want to decrease their body fat percentage. Such users should look for supplements that also contain ingredients designed to help preserve muscle mass.

What makes some fat burners better for men?

No matter where you look on the gender spectrum, you’ll find people who want to lose weight. As a result, there are fat burners on the market that are supposed to be gender-neutral and those that target male or female demographics specifically. So what would make one fat burner better for men than women?

The first thing you’ll want to consider is dosage. Fat burners geared toward men tend to have higher doses of their active ingredients because men typically have higher BMIs than women.

Next, there’s muscle-mass-oriented ingredients. There’s nothing to say that women don’t want to gain lean mass and keep it on, but this is generally a target for men in the fitness space.

Finally, there are ingredients that have been shown to affect testosterone levels and that some supplement companies include in their male fat burners. Low levels of testosterone and obesity share a link in many studies, so ensuring higher T levels may help fight fat. This is something that women will want to stay away from, as high T is linked to more abdominal fat in estrogen-based systems.

Animal Cuts

Best overall and best for boosting testosterone


  • Powder and capsule forms available
  • Three powder flavors
  • Powder has two kinds of carnitine
  • Capsules contain ashwagandha
  • Helps shed water weight


  • Pills and powder are different formulas
  • Powder doesn’t dissolve well in water
  • Has to be cycled on and off

Animal offers a slew of supplements intended to help men achieve their ideal physique. Their Cuts products are among the most effective fat burners on the market, with comprehensive ingredient lists and high doses. The difficult part is deciding whether to go with the powder or the capsules. We found the best prices for Animal Cuts through

Here’s a look at the highlights of each side-by-side:

  Animal Cuts capsules Animal Cuts powder
Cost $44 $41
Dandelion root

In some cases, despite sharing some ingredients, each supplement’s doses are markedly different. This is sometimes due to the greater bioavailability of a powder over a capsule, but that’s not always the case.

We reached out to Animal to discuss the differences between the two formulas, and the answer we received was rather interesting. Apparently, an attempt to render the capsules in powder form went so poorly that they had to build their powdered Cuts supplement from the ground up. Supposedly it tasted terrible and barely mixed with water. Our testers can attest to the pleasant taste of Animal Cuts Powder’s Blue Ice Pop flavor, so we’re grateful for that.

One thing that’s a little frustrating about Animal Cuts is that you have to cycle the products for three weeks on and one week off. Not only does this make the product more expensive per dose, but it also makes it a little harder to stick with the routine consistently. At least it makes sense for the powder, as carnitine studies show a decrease in efficacy over time, so a week off every month can help keep it active.

Animal Cuts capsules make their exact ingredient doses hard to figure, as many components are part of complexes, and the company only provides dosing information on the complexes as a whole. Here’s a look at how they list their ingredients:

  • Stimulant Complex (750mg): Caffeine Anhydrous, Kola Nut, Guarana, Yerba Mate, Raspberry Ketones, Coleus Forskohlii, Evodiamine
  • Metabolic Complex (750mg): Green Tea Extract (polyphenols/EGCG), Oolong Tea Extract (polyphenols), Black Tea Extract (polyphenols), Coffee Bean Extract (polyphenols), White Tea Extract (polyphenols)
  • Thyroid Complex (350mg): L-Tyrosine, Olive Leaf Extract, Salvia Officinalis (leaf)
  • Water Shedding Complex (800mg): Dandelion Root (taraxol, taraxerol), Uva Ursi Leaf (arbutin, methyl-arbutin), Hydrangea Root, Buchu Leaf, Juniper Berry Fruit, Celery Seed
  • Nootropic Complex (500mg): DMAE (dimethylaminoethanol), Bacopa Monniera (bacopasides A & B) (leaf), Huperzine A
  • Universal Animal Cuts Cortisol Inhibiting Complex (300mg): Ashwagandha Root Extract (withanolides), Eleutherococcus Senticosus (root), Phosphatidylserine, Magnolia Bark Extract
  • CCK Boosting Complex (300mg): Cha-De-Bugre (aerial parts), Apple Pectin (fruit), Cinnamon (bark)
  • Bioavailability Complex (500mg): Ginger Root (gingerols, shogaols), Cayenne (fruit), Grapefruit (6,7-Dihydroxybergamottin) (peel), Quercetin, Naringin (citrus), Piper Nigrum Extract (fruit)

By contrast, the ingredients and doses in Animal Cuts Powder are much clearer:

  • Choline: 685mg
  • Acetyl-L-carnitine: 750mg
  • L-carnitine tartrate: 750mg
  • Caffeine: 200mg
  • Herbal extract blend*: 150mg
  • N-acetyl-L-tyrosine: 500mg
  • L-tyrosine: 500mg
  • L-taurine: 1,000mg
  • Phosphatidylserine: 50mg
  • Huperzine A: 100mcg
  • Dandelion root powder: 100mg
  • Uva Ursi leaf powder: 100mg

*Herbal extract blend contains:

  • Green tea leaf extract
  • Oolong tea leaf extract
  • Black tea leaf extract
  • Coffee bean extract
  • White tea leaf extract
  • Coleus forskohlii root extract

Animal Cuts powder is available in three flavors:

  • Blue ice pop
  • Strawberry watermelon
  • Orange mango

Evlution Nutrition (EVL)

Best budget pick and best pre-workout


  • Wide variety of supplements
  • Several flavors to choose from
  • Comprehensive ingredients list
  • Only need to take it once daily
  • Ideal as a pre-workout


  • Not available as a capsule
  • Uses artificial flavors and colors
  • Sweetened with sucralose

EVL offers an impressive amount of supplements, including fat burners, protein powders, and workout aids. Their most effective fat burner — ENGN SHRED — comes in a powder form you mix into water. It’s technically a pre-workout, so in addition to helping you burn fat, it contains ingredients in doses designed to improve performance in the gym immediately after consuming it. This is distinct from many other fat burners that require you to take them more than once daily and often just before meals.

If you’re interested in ENGN SHRED, but you aren’t sure you want to start out with something as strong, EVL also sells a product called LeanMode, which is a much milder formula intended to help you lose weight. LeanMode is available as a powder or a capsule, and it’s less expensive than ENGN SHRED. It may also be less effective, though.

Here’s a look at ENGN SHRED’s full ingredients list:

  • Niacin: 35mg
  • Vitamin B6: 2mg
  • Folic acid: 800mcg
  • Vitamin B12: 25mcg
  • Choline: 200mg
  • Betaine anhydrous: 750mg
  • Choline bitartrate: 500mg
  • L-tyrosine: 500mg
  • Agmatine sulfate: 200mg
  • Alpha-glycerylphosphorylcholine: 60mg
  • Huperzia serrata extract: 6mg
  • Beta-alanine: 1,600mg
  • Conjugated linoleic acid powder: 500mg
  • L-carnitine L-tartrate: 500mg
  • Coleus extract: 100mg
  • Red pepper fruit extract: 25mg
  • Yohimbe extract: 40mg
  • Natural caffeine: 260mg
  • Green tea extract*

*The 260mg caffeine dose includes green tea extract, but the exact quantities of the natural caffeine and green tea extract are unknown.

The ingredients in LeanMode powder and capsules are nearly identical, but the quantities are noticeably different. Here’s a look at them side-by-side.

  LeanMode capsules LeanMode powder
CLA 500mg 1,000mg
Acetyl-L-carnitine 500mg 1,000mg
Green coffee bean extract 500mg 200mg
Green tea leaf extract 500mg 100mg
Garcinia Cambogia extract 250mg 200mg

We found the best prices for EVL products came from Here’s what you can expect:

  ENGN SHRED LeanMode capsules LeanMode powder
Cost for 30 servings $40 $20 $25.18
Cost per serving $1.23 $0.67 $0.84
Total active ingredients 18 5 5


Best high-end


  • Simple ingredient list
  • Low-stimulant formula
  • Good for suppressing appetite
  • High dose of cayenne
  • Bulk discounts available


  • On the pricey side
  • No free shipping
  • Large, six-capsule serving size

Hunter Burn is part of a three-prong approach to male wellness that Hunter promotes. In addition to Burn, the company offers Test and Focus supplements to boost testosterone and cognitive performance, respectively.

We appreciate Hunter’s commitment to simple ingredient lists, as their supplements don’t have the same potential for adverse effects as many others. But their prices are counterintuitive to this; their supplements contain less but cost more.

Here’s a look at Hunter Burn’s full ingredients list:

  • Vitamin D3: 3,000IU
  • Konjac root extract: 3,000mg
  • White kidney bean extract: 500mg
  • L-theanine: 200mg
  • Matcha green tea: 200mg
  • Cayenne pepper: 125mg

Hunter Burn utilizes green tea as a caffeine source and a 200mg dose of theanine to smooth out any of its potentially jittery effects. As such, it’s a good option if you don’t need to go stimulant-free but you still want to take it easy.

All of Hunters supplements follow the same pricing system, allowing you to purchase any for the following:

  • One-month supply: $80
  • Two-month supply: $160
  • Four-month supply: $240

Hunter charges shipping on all orders regardless of size as if those prices weren’t already high enough. You’ll pay a flare rate of $7.95 for shipping. The company will accept returns but only for unopened products.


Best money-back guarantee


  • High doses of cayenne and B12
  • Vegan-friendly capsules
  • Free shipping on bulk orders
  • Free of most major allergens
  • Contains black pepper for bioavailability
  • 100-day money-back guarantee


  • May contain too much caffeine for some
  • Uses DMAE
  • No subscription options

PrimeShred gets lost in the mix a little bit because there isn’t a lot about it that makes it stand out. But it offers an impressive ingredient list for a reasonable price on a product that contains none of the following:

  • Soy
  • Gluten
  • Dairy
  • GMOs
  • Artificial colors or flavors

It’s also made in the U.S. and boasts one of the highest doses of cayenne in its class. Here’s a closer look at the ingredients in PrimeShred:

  • Vitamin B3: 15mg
  • Vitamin B6: 1.3mg
  • Vitamin B12: 24mcg
  • Green tea leaf: 500mg
  • L-tyrosine: 300mg
  • Rhodiola root: 250mg
  • L-theanine: 250mg
  • Caffeine anhydrous: 225mg
  • Cayenne pepper extract: 200mg
  • Dimethylaminoethanol (DMAE): 150mg
  • Green coffee: 100mg
  • BioPerine: 5mg

The fact that PrimeShred contains DMAE isn’t a dealbreaker, but it’s worth noting. DMAE can be an effective nootropic, but fat loss isn’t its primary benefit. And with a side effect profile that includes a fair risk of headaches, high blood pressure, and mental confusion, it might preclude some people from taking the supplement.

PrimeShred is available in the following quantities:

  Cost Cost per bottle Shipping
One bottle $50 $50 $7.95
Three bottles $100 $33 Free
Five bottles $150 $30 Free

Burn Lab Pro

Best non-stimulant


  • Good choice for athletes
  • 30-day money-back guarantee
  • cGMP-certified facility
  • Non-GMO formula
  • Vegan-friendly


  • Small dose of Bioperine
  • Free shipping on their largest order only
  • Not an all-natural blend

Burn Lab Pro designs their product with a result-first mindset that admits fewer botanical ingredients and more lab-derived components than some of their competitors. At the same time, they take pains to produce their supplements safely and with no unnecessary additives. That’s why you’ll see complex chemical names like HMB ß-hydroxy ß-methylbutyrate on an otherwise short ingredients list.

Here’s a look at Burn Lab Pros ingredients in total:

  • GFT chromium: 90mcg
  • Calcium: 262.5mg
  • HMB ß-hydroxy ß-methylbutyrate: 1,500mg
  • Forskohlii root: 375mg
  • Cayenne pepper extract: 75mg
  • BioPerine: 3.75mg

HMB ß-hydroxy ß-methylbutyrate (HMB) has been shown to increase performance in the gym by reducing muscle fatigue, letting you work harder for longer. That means it’s not the best ingredient for someone hoping their fat burner will do all the work for them. Studies also show no adverse effects at this point, but further research is needed to verify HMB’s safety.

Chromium is another of Burn Lab Pro’s ingredients that you don’t often see in competitors’ blends. Much of the available research into chromium’s potential role in weight loss remains inconclusive, with studies showing statistically insignificant differences between intervention and control groups.

Here’s how Burn Lab Pro’s pricing works:

  Cost Cost per bottle Shipping
One bottle $60 $60 $7.95
Two bottles $118 $59 $7.95
Four bottles $177 $44 Free

Old School Labs

Best all-natural and best for keto dieters


  • All-natural ingredient profile
  • Contains chrysin, a muscle-preserving fat burner
  • Gluten-free and non-GMO
  • Subscribe and save 15%
  • Points-based reward system
  • Discounts for military and students
  • Good money-back guarantee


  • Powder uses sucralose
  • Free shipping only kicks in after $70

Old School Labs has several outstanding supplements for men looking to shed fat, build muscle, and maintain overall wellness. Those include two excellent fat burners in their Vintage Burn capsules and powder and their Real Keto Fat Burner. They also boast one of the best money-back guarantees, allowing you to recoup your investment without even having to send back your remaining product.

In addition to their fat burners, Old School Labs offers the following:

  • Sleep support
  • Vitamins
  • Joint and bone support
  • Protein shake mix
  • BCAAs
  • Workout recovery
  • Testosterone support
  • Nootropics

Here are the prices for their three fat burners:

  Vintage Burn capsules Vintage Burn powder Real Keto Fat Burner
Cost for 30 servings $39.99 $39.99 $34.99
Cost with subscription $33.99 $33.99 $0.67
Total active ingredients 9 14 12

Here are the ingredients for Old School Labs Vintage Burn:

  • Green tea leaf extract: 330mg
  • Green coffee bean extract: 270mg
  • Raspberry ketones: 200mg
  • Olive leaf extract: 160mg
  • Caffeine: 150mg
  • Bacopa leaf extract: 130mg
  • Garcinia fruit extract: 100mg
  • Chrysin: 100mg
  • Forskohlii root extract: 60mg

An important ingredient in Vintage Burn that you don’t see in many competitors’ products is chrysin, which studies show helps burn fat while preserving muscle. Chrysin is in both the Vintage Burn powder and capsules, but like Animal Cuts, the capsules and powder have notably different formulas.

Here are the ingredients for Vintage Burn powder:

  • Vitamin C: 90mg
  • Niacin: 5mg
  • Vitamin B6: 2mg
  • L-taurine: 500mg
  • L-leucine: 500mg
  • Olive Leaf Extract: 160mg
  • Caffeine: 150mg
  • L-carnitine tartrate: 150mg
  • L-carnitine HCL: 150 mg
  • Green tea leaf extract: 100mg
  • Chrysin: 100mg
  • Garcinia cambogia extract: 100mg
  • Green coffee bean extract: 75mg

In addition to these active ingredients, Vintage Burn powder contains a few extras to add flavor and color. Unfortunately, one of these is sucralose, which can leave a bitter taste in some people’s mouths. You can get Vintage Burn powder in strawberry kiwi and peach mango flavors.

The other fat burner that you can get from Old School Labs is their Real Keto Fat Burner, which is significantly different than the Vintage Burn formulas. Specifically, it contains ingredients designed to support fat loss through ketogenesis, a process related to but unlike normal thermogenesis.

The Real Keto Fat Burner includes the following:

  • Pantothenic acid: 100mg
  • Iodine: 50mcg
  • Choline: 160mg
  • L-methionine: 125mg
  • Trimethylglycine: 100mg
  • Inositol: 100mg
  • Guggul gum extract: 200mg
  • Tyrosine: 200mg
  • Caffeine anhydrous: 150mg
  • Organic kelp: 17mg
  • DL-phenylalanine: 160mg
  • 5-HTP: 35mg

Shipping from Old School Labs is only free if you spend over $70. If you don’t, you’ll pay the following rates:

  • Standard (3-5 days): $6.83
  • Expedited (1-3 days): $9.41

Instant Knockout


  • Uses well-supported ingredients
  • Piperine increases bioavailability
  • Vegan-friendly formula and capsules
  • Also offers a meal replacement system
  • Get one month free with a 3-month supply


  • No free shipping option
  • Poor return policy
  • May cause some jitteriness

Instant Knockout has been around since 2014, and they’ve accumulated some interesting success stories from within the MMA world. Their two central offerings are their fat burner and a meal replacement system. You can purchase these separately or together, but combining them adds more convenience than it does savings.

The company’s fat burner, Instant Knockout Cut, has a pretty simple ingredient profile with a healthy dose of glucomannan to help curb your appetite. The caffeine-to-theanine ratio is a little off in our opinion, so you might still feel a few of the jitters from its stimulants.

Here’s a look at the ingredients in Instant Knockout Cut:

  • Green tea extract: 500mg
  • Cayenne pepper seeds: 100mg
  • Glucomannan: 1,800mg
  • Caffeine anhydrous: 300mg
  • Vitamin B6: 5mg
  • Vitamin B12: 10mcg
  • Vitamin D3: 45mcg
  • L-Theanine: 100mg
  • Piperine: 10mg

Instant Knockout Cut comes in 1-, 2-, and 4-month supplies you can get for the following prices:

  • One-month supply: $65
  • Two-month supply: $130
  • Four-month supply: $195

Instant Knockout Complete

Instant Knockout Complete is the company’s meal replacer. It’s essentially a 400-calorie shake you consume once daily instead of a regular meal. In theory, it will provide you with most of the nutrients you’d get from that meal but with fewer calories and ingredients that should help with fat loss.

Note that one bag only contains 14 servings, so you’ll have to buy two bags to get a month’s worth. Also, it only comes in one flavor: vanilla.

Here are the main ingredients in Instant Knockout Complete:

  • Pea and soy protein
  • Golden flaxseed
  • MCT oil
  • Oat flour
  • Chia seed
  • Organic brown rice

Instant Knockout Complete’s nutritional profile:

  • Vitamin D: 20mcg
  • Calcium: 653mg
  • Iron: 8mg
  • Potassium: 2,339mg
  • Vitamin A: 786mcg
  • Vitamin C: 45mg
  • Vitamin E: 8mg
  • Vitamin K: 36mcg
  • Thiamin: 0.8mg
  • Riboflavin: 0.8mg
  • Niacin: 6mg
  • Vitamin B6: 1.3mg
  • Folate: 200mcg
  • Vitamin B12: 1.2mcg
  • Biotin: 109mcg
  • Pantothenic acid: 2mg
  • Phosphorus: 1,428mg
  • Iodine: 63mcg
  • Magnesium: 210mg
  • Zinc: 5mg
  • Selenium: 17mcg
  • Copper: 0.3mg
  • Manganese: 0.7mg
  • Chromium: 12mcg
  • Molybdenum: 15mcg
  • Chloride: 690mg
  • Choline: 165mg

Instant Knockout Complete is available in 1-, 2-, and 3-month supplies:

  • One-month supply: $65
  • Two-month supply: $130
  • Three-month supply: $195

Unfortunately, Instant Knockout does not provide free shipping, no matter how much you spend. Shipping is $8.95, and delivery usually takes just 2-4 days.

Frequently asked questions about fat burners for men

Do fat burners for men really work?

Fat burners can increase your body’s utilization of fat stores for energy, especially when you combine them with diet and exercise. Multiple studies support many of the most commonly used ingredients in fat burners, like cayenne, choline, and caffeine. Fat burners for men take things a step further by potentially supporting things like muscle mass and healthy testosterone levels.

Are fat burners for men safe?

Just as many of the most commonly used ingredients have clinical evidence supporting their efficacy, they also have plenty of evidence supporting their safety. Most men will feel few to no side effects, and the ones that crop up are usually rather mild. They might include stomach upset, nausea, or headaches.

That said, some fat burners contain ingredients that are either more dangerous or less well-researched than others. It’s wise to talk to your doctor or at least a nutritionist before beginning any fat-burning regimen.

What’s in fat burners for men?

Most fat burners contain things like caffeine, cayenne pepper, green tea extract, and other ingredients that studies show can mobilize fat stores in the body. Fat burners for men might also contain ingredients like beta-alanine or chrysin, which can also help preserve lean muscle mass. You might also find ingredients like ashwagandha, which supports testosterone production.

Will fat burners give me the jitters?

Many fat burners contain caffeine, and that can make you feel a bit jittery. But the best fat burners out there also contain theanine, which rounds off the caffeine’s sharp edge and tames the jitters. There are also several options out there that are low-stimulant or completely stim-free if you’re worried about caffeine side effects.

Can I drink coffee with a fat burner?

Fat burners that contain caffeine usually have a few cups worth in their servings, so you might want to switch to decaf if you still require the coffee-drinking experience in the morning. It’s wise to start out by removing coffee from the equation until you get to know how a given fat burner makes you feel. You can then introduce it back in small portions to make sure you don’t have any negative reactions.

Can fat burners curb my appetite?

Several ingredients in fat burners can stave off feelings of hunger. These include caffeine and glucomannan, a fiber that helps your stomach feel full. That said, one of the best ways to curb your appetite is to stay hydrated, which is an instruction you’ll find on many fat burner labels.

How long do fat burners take to work?

Depending on ingredients and dosing, you might notice the effects of a fat burner within the first several days. More commonly, it will take a few weeks for you to notice weight loss. Combined with a cutting diet, you should aim to lose no more than two pounds per week. Otherwise, you might begin to suffer from certain deficiencies, or your body may target muscle mass instead of fat.

Why you should trust us

At Innerbody Research, we extensively test each health service we review, including thermogenic fat burners. All told, our team has collectively spent hundreds of hours testing and researching fat burners to provide an accurate, unbiased analysis of how they compare, free of marketing jargon and gimmicks.

Over the past two decades, Innerbody Research has helped tens of millions of readers make more informed decisions to live healthier lifestyles. We evaluate the service based on adherence to quality, the latest medical evidence and health standards, and a simple question: would we buy the product or service ourselves if it weren’t part of our job, and would we recommend it to family and friends?

Additionally, like all health-related content on this website, this guide was thoroughly vetted by one or more members of our Medical Review Board for accuracy.

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