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.

Resolve to do more prying. Oysters are one of the best food sources of zinc, a mineral that works with the hormone leptin to regulate appetite. Research shows that overweight people tend to have higher levels of leptin and lower levels of zinc than slimmer folk. A study published in the journal Life Sciences found that taking zinc supplements could increase leptin production in obese men by 142 percent! A half-dozen oysters only have 43 calories but provides 21 percent of your RDA of iron—deficiencies of which have been linked to a significant increase in fat gene expression.
According to the School of Sport and Exercise Sciences at University of Birmingham, “The term ‘fat burner’ is used to describe nutrition supplements that are claimed to acutely increase fat metabolism or energy expenditure, impair fat absorption, increase weight loss, increase fat oxidation during exercise, or somehow cause long-term adaptations that promote fat metabolism.” (3)
Green Tea: Green tea and green tea extracts have been shown to activate the body's thermogenic fat-burning activity. A study published in the American Journal of Clinical Nutrition found that men who ingested the active ingredient in green tea (catechins) significantly reduced their total fat area, waist circumference, skinfold thickness, and subcutaneous fat area.[2] As exercise physiologist Nick Coker explains in the article "Your Expert Guide to Green Tea," taking this ingredient with caffeine has been shown to make it even more effective.
Sometimes, to whip your body into shape, you have to get a little nutty. While nuts are high in fat, it's that very fat that makes them such powerful weapons in the war against a ballooning belly. In fact, a study published in Diabetes Care revealed that study participants who consumed a diet rich in monounsaturated fats, like those in nuts, over a 28-day period gained less belly fat than their saturated fat-consuming counterparts while improving their insulin sensitivity.
You can acquire CLA from supplements as opposed to natural foods, but it might not be as beneficial, considering CLA found in supplements is not the most effective type for stopping fat storage. Whole foods are made of CLA isomers called c9, t11, while many supplements are high in the types of CLA called t10, c12, which have less drastic effects. Your best bet is to eat foods that supply relatively high doses: real butter from grass-fed cows (ideally organic), full-fat dairy (preferably raw and possibly fermented, such as yogurt), grass-fed beef, and to a lesser degree grass-fed lamb, veal, turkey and wild-caught seafood.
Who Makes It: Shred JYM is made by JYM Supplement Science. The company is the brainchild of Jim Stoppani, a legendary bodybuilder and PhD of exercise physiology. For over a decade, JYM Supplement Science has been formulating and manufacturing high quality fitness supplements using only research-backed ingredients. They are also proud to use no proprietary blends, so every ingredient and dosage amount is clearly listed on the label.
Who knew there was a connection between a spicy pepper scorching your mouth and burning your belly fat? Scientists did! According to a study in the American Journal of Clinical Nutrition, daily consumption of one of the compounds found in pepper (capsaicin) speeds up abdominal fat loss by boosting the body's ability to convert food into energy. It also acts as a natural appetite suppressant: men who ate spicy appetizers consumed 200 fewer calories at later meals than those that did not, a study by Canadian researchers found. All you have to do to reap the benefits is use a pinch of cayenne pepper to season grilled fish, meats, and eggs.
This classic lunchbox sandwich condiment is teeming with flat-belly nutrients such as cholesterol-lowering monounsaturated fats and is a great source of plant-based protein. According to a recent study presented at the annual Society for Endocrinology conference, researchers found that when protein is digested and broken down into amino acids in your body, one of those amino acids—phenylalanine—triggers hormones that help reduce appetite and ultimately leads to fat burn and weight loss. Go for brands that have an ingredient list of just two items: nuts and a little salt, or look to our guide: Best and Worst Peanut Butters.

Whether it's turning off fat genes, helping to build muscle that robs energy from adipose cells, revving your metabolism and ability to burn fat, or helping you feel fuller longer so you consume fewer calories, these foods have been proven to show an increased rate of fat loss. So stop these bad habits that give you belly fat, and instead, incorporate these healthy fat burning foods into your diet to whittle your waist and bring your midriff back in line.
Caffeine: Studies show possible modest effects on body weight or decreased weight gain over time when consuming caffeine. Caffeine is usually OK in small to moderate amounts for most people but can also cause side effects like heart palpitations and restlessness. There’s no sound evidence that caffeine alone will help you lose weight, and the cons of taking too much caffeine definitely seem to outweigh the pros.
Sunny side up, scrambled, hard-boiled, or fried—it doesn't matter. A pan, spatula, and carton of eggs are all you need to fry some serious flab. Eggs are one of the best sources of choline, a major fat-burning nutrient that helps turn off the genes responsible for belly-fat storage. Bonus: eggs are a great source of lean protein, which can set the fat-burning pace for your entire day when eaten for breakfast. In a study of 21 men published in the journal Nutrition Research, half were fed a breakfast of bagels while half ate eggs. The egg group were observed to have a lower response to ghrelin, were less hungry three hours later and consumed fewer calories for the next 24 hours!
Are the weight loss claims about these ingredients necessarily true? It seems to depend on the type of thermogenic fat burners in question, the active ingredients that are used in the products, dosages taken and an individual person’s response. Active ingredients that are commonly used in thermogenic supplements vary by brand but usually contain a mix of stimulants, herbs and acids. Testimonials, along with findings from certain studies, suggest that thermogenics do seem to work for some — however in some cases their ingredients can also be dangerous or totally ineffective.
This content is for informational and educational purposes only. It is not intended to provide medical advice or to take the place of such advice or treatment from a personal physician. All readers/viewers of this content are advised to consult their doctors or qualified health professionals regarding specific health questions. Neither Dr. Axe nor the publisher of this content takes responsibility for possible health consequences of any person or persons reading or following the information in this educational content. All viewers of this content, especially those taking prescription or over-the-counter medications, should consult their physicians before beginning any nutrition, supplement or lifestyle program.
Hydroxycut Hardcore Elite is a great product, offering some of the most high-quality fat burning pills on the market. Hardcore Elite contains ingredients to target the most important aspects of fat burning: metabolism, thermogenesis, energy and more. All wrapped up in one convenient package, this product provides an easy way to increase your fat burning potential. Unfortunately, it does not contain any hunger suppression ingredients, which can be a downside for some people who have difficulty sticking to their diets.
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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