Instant Knockout contains green tea and cayenne pepper – both staples of many popular fat burners. These ingredients are said to help burn more calories, which could lead to faster results. IK also contains glucomannan, a fiber which may promote fullness and reduce food cravings. These ingredients are joined by vitamin B6 and B12, GTF chromium, zinc, piperine and green coffee extract. The result? A natural supplement without any risky substances – and one that could help you achieve your goals faster.
Who makes it: Hydroxycut Hardcore Next Gen is made by MuscleTech, one of the big players in the supplement industry. In business for over 20 years, MuscleTech has worked hard to develop a reputation of quality, innovative products and affordable prices. With a wide range of products and a huge fan base, it’s no secret that MuscleTech is one of the better companies out there.

Still, it’s a worthy goal to lose belly fat because it’s “unfortunately the most dangerous location to store fat,” says Lawrence Cheskin, M.D., chair of the department of nutrition and food studies at George Mason University and associate professor of health, behavior & society at Johns Hopkins University. Because belly fat—also known as visceral fat, or the deep abdominal fat that surrounds your organs—is more temporary, it circulates throughout the bloodstream more regularly and is therefore likelier to raise the amount of fat in your blood, increasing your blood sugar levels and putting you at a greater risk of heart disease and type 2 diabetes.
If you want to lose fat, you have to eat fat...the right kind, that is. Adding healthy fats, in the form of monounsaturated and polyunsaturated fats, can help you feel more satisfied with your meals. Yasi Ansari, M.S., R.D., C.S.S.D., national medial spokesperson for the Academy of Nutrition and Dietetics, says, "Fat sources that I recommend boosting in the diet come from unsaturated fatty acids found in foods like olive oil, nuts, avocados, fatty fish, and eggs, as they can help increase satiety while providing a variety of health benefits when consumed in moderation." You can increase your intake of healthy fats by adding some chopped avocado into your salads, enjoying wild salmon twice a week, and having a little peanut butter with your post-workout snack or smoothie. Just remember to enjoy them in moderation as they're still very calorie-dense, Ansari says.
Red is one of the best colors for weight loss. That's because the color is due to higher levels of nutrients called flavonoids—particularly anthocyanins—which calm the action of fat-storage genes, according to Oxidative Medicine and Cellular Longevity research. In fact, red-bellied stone fruits like plums boast phenolic compounds that have been shown to "turn off" fat genes. Plus, their pectin—a gelatin-like type of fiber found in the cell walls of fruits—limits the amount of fat your cells can absorb, as shown by a Nutrition & Metabolism study.
Caffeine tolerance is lower – In the past fat burners with high stimulants made women feel worse not better. Now, the best female fat burners use natural alternatives to help you burn more calories. This means you can give your metabolic rate the boost it needs, improving your energy levels in the gym and avoiding problematic palpitations or nausea which can halt your progress.
If you’re only getting a minimal amount of sleep each night, that leaves more time for you to snack and make otherwise unhealthy decisions that could affect your weight loss. Although it will vary from person to person on how much sleep you actually need to be most effective (and therefore make progress toward your weight loss goals), the ideal number is typically seven or eight hours, says Dr. Cheskin.
A handful of almonds packs a serious fat-burning punch: One International Journal Of Obesity and Related Metabolic Disorders study of overweight adults found that eating about a quarter-cup of almonds for 6 months led to a 62 percent greater reduction in weight and BMI, thanks to a compound that limits the fat absorbed by the body. And eating just 1.5 ounces of almonds daily led to a reduction in belly and leg fat, a 2015 study published in the Journal of the American Heart Association showed. For added effect, eat almonds before working out: The amino acid L-arginine can help you burn more fat while building muscle.
Brand reputation – have you heard of the brand/company who makes the product? Are they reputable, and known for making quality products? In our list (found above), we only included products from quality companies – but there are certainly low quality products out there. Especially if you’re doing your own research, read through some reviews to determine the quality of the product and the company behind it.
Still, it’s a worthy goal to lose belly fat because it’s “unfortunately the most dangerous location to store fat,” says Lawrence Cheskin, M.D., chair of the department of nutrition and food studies at George Mason University and associate professor of health, behavior & society at Johns Hopkins University. Because belly fat—also known as visceral fat, or the deep abdominal fat that surrounds your organs—is more temporary, it circulates throughout the bloodstream more regularly and is therefore likelier to raise the amount of fat in your blood, increasing your blood sugar levels and putting you at a greater risk of heart disease and type 2 diabetes.
Third on our best fat burners list is Hourglass, a 90 capsule fat burner which has an impressive selection of ingredients and attractive looking packaging. You might be put off by some of the more female orientated aspects of the product, including the marketing and the look of the brand, but don’t be. There’s no such thing as a gender specific fat burner. Men and women’s bodies are almost identical so there’s no reason why this product won’t work for any man. The best way to prove this is to look at the ingredients. As you’ll see, they’re common in many male targeted fat burners.
Instant Knockout looks great – but all the signs suggest it offers much more than pretty packaging. The product can help support your training goals, boost confidence and keep you motivated for longer as part of a good diet and exercise routine. No proprietary blends and transparent formula are big bonuses and make this product stand out on our list!
While few would suggest you start hitting up the tanning beds for better health, getting some natural sunlight can help you get rid of belly fat in a matter of weeks. Researchers at the Fred Hutchinson Cancer Research Center found that vitamin D-deficient overweight women between 50 and 75 who upped their intake of the so-called sunshine vitamin shed more weight and body fat than those who didn't. To practice safe sun, make sure you're limiting yourself to 15 sunscreen-free minutes per day.
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