Best Fat Burners for Men of 2025, Reviewed by a Dietitian

Despite the claims you may read, no fat burner pill can magically melt body fat. Alongside a calorie deficit and workout regimen, though, they may help promote progress. Importantly, Transparent Labs Recomp is a transparent, third-party tested product.

“I’m usually hesitant with fat burners, but I appreciate that Recomp has been tested by a third party,” according to Chelsea Rae Bourgeois, RDN, who gave the formulation a 3.5 out of 5. “I also like that Transparent Labs provides research-backed ingredients. Still, fat burners aren’t necessarily appropriate for everyone.”

This supplement supports fat loss from different angles, thanks to its combination of ingredients. In one dose, you get 250mg of forslean, which contains forskolin, an ingredient that may help promote weight loss, according to the National Institutes of Health; however, research is very limited and inconclusive.

You also get l-theanine, which can help support mental clarity and focus for a distraction-free workout, per the Cleveland Clinic. However, you do need to take multiple servings per day, earning this product a 3 out of 5 for dosage convenience. It’s best to start with one capsule twice per day to determine your tolerance, the brand recommends.

“I like that Transparent Labs doesn’t promote Recomp as a magic pill,” Bourgeois said. “If you’re sensitive to caffeine, the multiple doses of caffeine may not be ideal for you.” Though it’s not necessarily a downside, too much caffeine may not work for every athlete, especially if you train at night.

While we like the formula, TL’s Recomp isn’t the most budget-friendly pick, earning a 4 out of 5 for cost. “The price is pretty good for what you’re getting, but it’s not the cheapest fat burner on the market,” says Nick English, BarBend expert contributor. One serving is only $0.91, however, you have to take multiple servings per day, so you’ll be restocking relatively quickly.

Read our full Transparent Labs Fat Burner Review.

Different fat burners take different approaches in their formulas. Some focus on appetite control and others may increase your body temperature to burn more calories (aka thermogenesis). For those who want a thermogenic fat burner, we recommend Jacked Factory BURN-XT.

“Fat burners usually give me pause, but I like that BURN XT doesn’t promise magic results and it contains many of the same ingredients you’d find in a clinically effective pre-workout,” says BarBend expert contributor and RDN, Chelsea Rae Bourgeois.

Jacked Factory Burn XT contains 450mg of green tea extract, which may help with weight loss and blood sugar regulation. It also contains 25mg of cayenne pepper and 270mg of total caffeine, which may help with thermogenesis and increased energy. “If you’re sensitive to caffeine, BURN XT might give you some jitters,” mentions Bourgeois.

You also get 700mg of l-carnitine, which may help improve your body’s ability to metabolize fat, according to the National Institutes of Health (NIH). However, this is probably most beneficial for people with larger amounts of body fat, according to Jillian Kubala, RDN.

“I’m generally not a fan of fat burners, but this contains fewer questionable ingredients than others on the market, “ according to Bourgeois, who gave the formulation a 3.5 out of 5. “They should still be included mindfully and under the guidance of a doctor if possible.”

Jacked Factory provides supplement facts for both one capsule and two, so beginners can start with a half dose first, which is wise if you’re new to fat burners. However, Jacked Factory does recommend two doses per day, so we gave the dosage convenience a 3 out of 5 rating.

Jacked Factory Burn XT also comes at a pretty reasonable price, earning a 5 out of 5 rating for cost. One 60-serving bottle is $34.99, which is about $0.58 per serving. Despite that you need to take multiple servings daily, this is still one of our most budget-friendly options.

For anyone who exercises at night or loves to get their caffeine from coffee (or just doesn’t like caffeine period), we recommend Legion Phoenix Stim-Free. This is a totally stimulant-free formula that provides emerging research to back up its ingredients.

“The caffeine-free version of Legion Phoenix scores a 3.75 out of 5 for its formulation,” Chelsea Rae Bourgeois, RDN says. “For a fat burner, it contains an impressive list of ingredients with science-backed doses.”

Legion Phoenix Stim-Free includes 5-HTP, caralluma fimbriata, and forskolin, all of which are ingredients that may help suppress your appetite, making it a little easier to maintain a calorie deficit. However, 5-HTP isn’t safe for everyone, according to Jillian Kubala, RDN. If you’re taking any medications (especially SSRIs, MAOIs, or tricyclic antidepressants), it’s best to check with your physician before trying this fat burner.

“Plus, I’m impressed that it provides 100% of your daily needs for vitamins B6 and B12,” adds Bourgeois, who appreciates that Legion uses dosages and ingredients backed by updated research on ingredients’ effects on weight loss.

When it comes to dosage convenience, our testers gave this product a 4 out of 5, as you only need to take one dose of three capsules. “If you don’t like swallowing pills, that could be a deal breaker,” says Bourgeois. We also like that this product is third-party tested and Legion doesn’t try to make any huge fat-burning promises — this product may help you burn a few more calories and may suppress your appetite.

For 30 servings per bottle, this product costs $34.99, which is about $1.16 per serving. This is pretty pricey compared to other picks on this list, despite that we appreciate the ingredients. Our team rated Legion Phoenix Stim-Free a 3 out of 5 for cost.

1st Phorm’s L-carnitine isn’t exactly a fat burner like the other products on this list. However, L-carnitine may help promote fat loss if you’re in a calorie deficit and following an exercise plan. We do still need larger studies to confirm a link between carnitine supplements and weight loss. However, the 1,500-milligram dose is in line with the clinically-researched dosage. According to Chelsea Rae Bourgeois, RD, “[This] clinically based dose of L-carnitine [may] support the body’s biological processes to reduce fatigue during your workout and efficiently utilize fatty acids.”

“The 1,500 milligrams of L-carnitine per scoop is very close to the researched recommendation of 2,000 milligrams daily,” says Bourgeois, who gave the formulation a 3.5 out of 5. “However, it may be overdoing it, as L-carnitine is found in various food sources.”

One serving also packs 200 milligrams of green tea leaf extract and 2,500 milligrams of fucoxanthin, an ingredient that’s found in brown seaweed. Some studies have shown that fucoxanthin may support weight loss, however, there’s a lack of substantial research in this area. (1) 

Unlike other fat burners, 1st Phorm’s product does come in five different flavors. However, Bourgeois highlights that “it contains artificial sweeteners that many people cannot tolerate.” It’s also a powdered supplement, whereas most other fat burners are capsules. For that reason, we rated the dosage convenience a 4 out of 5.

Compared to Legion’s fat burner, this one has a pretty approachable price point. One 60-serving container is $42.99, which is about $0.71 per serving. For cost, our testers gave this one a 4.5 out of 5 rating.

Our team loves products with simple formulas — the less unnecessary ingredients, the better. That’s precisely why we loved BulkSupplements Berberine HCl. Berberine is the only ingredient in this supplement with zero additives or sweeteners. Berberine is an ingredient found in some plants and may have some weight-loss properties, according to the National Institutes of Health. However, more studies are needed to create a solid link. 

“There is still so much to learn about berberine and its effects on fat loss,” Chelsea Rae Bourgeois, RDN, says, rating the formulation a 2.5 out of 5. “In addition to the limited research, the potential for medication interactions really gives me pause. Plus, it’s not third-party tested.”

Plus, berberine is considered unsafe for use during pregnancy or breastfeeding, according to the National Institutes of Health. It’s especially important to consult with your physician before starting this supplement.

We do like that this product comes in the form of a powder with no flavor. That makes it easy to mix with your supplement stack or in a post-workout smoothie. However, this berberine doesn’t come with a scooper in the bag, so we had to give the dosage convenience a 3.5 out of 5.

There are plenty of bulk buy options to choose from, making it convenient for those who want to save extra money. And when it comes to cost, this one earned a 5 out of 5 rating. “There isn’t any fluff in Bulk Supplements’ Berberine HCI. You’re paying for berberine, and that’s what you get,” says Bourgeois. One container (50 grams) contains 100 servings and costs $21.96, making the serving cost only about $0.21. Needless to say, it’s definitely a budget-friendly choice.

Green tea extract is a pretty common fat burner ingredient — you can find it in many of the standard fat burners above. For athletes who don’t want to try a typical fat burner pill, green tea extract is a great alternative to consider. If that’s the case, we recommend Thorne’s Green Tea Phytosome, which packs 250 milligrams of decaffeinated green tea extract.

“The research has shown that green tea extract may offer many benefits for the average healthy adult,” according to Chelsea Rae Bourgeois, RDN, who gave this formula a 4 out of 5. “However, it doesn’t come without risks and it should be discussed with your doctor before adding to your supplement routine.”

“In the world of weight loss supplements, green tea has likely been studied the most,” says Bourgeois. “Camellia sinensis, where Thorne derives their green tea extract from, has been linked to positive effects on weight management, diabetes control, and cardiovascular health.”

Our team gave Thorne a 3.5 out of 5 for dosage convenience. The serving size is only one capsule but you do have to take two to three servings per day (unless your doctor says otherwise). 

On the surface, Thorne’s Green Tea Extract seems pretty budget-friendly. After all, it’s only $30 for a 60-serving bottle. However, considering you need to take up to three servings each day, that’s actually more like $1.50 per serving, making this somewhat pricey. As a result, our team gave this a 3.5 out of 5 for cost.