You’ve heard they're bad for you. But trans fats also slow down your body's ability to burn fat. "They have an altered shape and make your biochemistry run funny," Hyman says, explaining that trans fat binds to fat and liver cells and slows metabolism. Eating trans fat can also lead to insulin resistance and inflammation, both of which cripple metabolism and can cause weight gain.
Refined carbs, such as bagels, white bread, and potatoes, create a surge in insulin that in turn promotes storage of fat and may drive down your metabolic rate, says Louis Aronne, M.D., an obesity specialist at New York Presbyterian Weill Cornell Medical Center, who recommends high-fiber carbs instead. "It's important to keep carbohydrates in your overall diet, but focus on vegetables, fruits, and whole grains, which have less of an impact on insulin levels," he explains.

Studies have shown that high-intensity interval training is effective at burning belly fat and boosting your metabolism more than steady-state cardio. Alternating between short bursts of intense effort and periods of lower intensity resets your metabolism at a higher rate, so you burn more calories hours after your workout. This is known as EPOC (excess post-exercise oxygen consumption). Try this 10-minute HIIT workout you can do at home.


A 2003 study in the International Journal of Obesity demonstrated that a low-calorie diet that’s rich in almonds could help people shed weight. Not only do the good monounsaturated fats in almonds have an effect on insulin levels, say scientists, but also give dieters a feeling of fullness, meaning that they are less likely to overeat. So stock your pantry with almonds, walnuts, and nut butter.
If you vary your diet so that you get more calories once in a while, your metabolism will speed up to meet the need of burning the extra calories without your gaining any weight. Then the next day when you eat less again, your metabolism will still be higher so your body will burn fat to meet the energy needs of the higher metabolic rate. If you add in exercise, you will maintain a higher metabolic rate which will expedite the process even further.
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When it comes to weight loss, a strong metabolism is the key to not only reaching your goals, but also to reaching them in record time. Sadly, many diets and weight loss programs have the opposite effect and wind up lowering your body’s ability to burn calories, making your journey to your ideal weight much harder than it has to be. So, if you struggle with losing weight or don’t feel like the numbers are reducing as quickly as you’d like, here are nine effective actions you can take that will put your metabolism (and your weight loss) in higher gear:

If you want to weigh less, you’ve got to eat less, right? Well, if you take in too few calories, it can cause your body to lose muscle mass, which will decrease the rate of your metabolism. Plus, when you skimp on calories, your body slows the rate at which it burns calories to conserve the fuel it’s got. “Under-fueling is just as risky as over-fueling,” explains Carolyn Brown, MS RD at Foodtrainers in Manhattan. Lisa Moskovitz, RD, CDN agrees: “In an attempt for quick, noticeable weight loss, many people wrongfully believe that eating as few calories as possible is the best solution. Not only can this lead to numerous nutritional deficiencies as the body is getting less food overall, but it can also actually have the opposite effect on weight loss.” Instead of cutting calories like crazy, use the simple diet and exercise hacks below that can help you slim down quickly and safely without screwing up your metabolism.
Most of your resting metabolism is taken up by your organs—brain, heart, liver, etc. But the biggest factor affecting your metabolism that you can control is your ratio of body fat to lean muscle mass. "Muscle burns more calories than fat tissue, because muscle requires more energy to maintain," says Harold Gibbons, New York State Director of the National Strength and Conditioning Association. "The more fat you have, the slower your metabolism will be."

Add mustard to your meal, and feel the burn—literally! Scientists at England’s Oxford Polytechnic Institute found that by eating just one teaspoon of mustard (about 5 calories) can boost the metabolism by up to 25 percent for several hours after eating. The benefits, researchers say, may be attributed to capsaicin and allyl isothiocyanates, phytochemicals that give the mustard its characteristic flavor.


It's one of the most frustrating realities of dieting—if you cut out too many calories, your metabolism thinks times are lean and puts the breaks on fat-burning to conserve energy, Hunter explains. Here’s the trick to keeping your metabolism revved up while dieting: Eat enough calories to at least match your resting metabolic rate (what you'd burn if you stayed in bed all day; calculate yours here). That's about 1,330 calories for a 5-feet-4-inch, 150-pound, 40-year-old woman.
It's tempting to curl up on the couch the minute PMS mood swings and bloat strike, but you'll lose more weight if you exercise during those two weeks before your period, according to a recent study at the University of Adelaide in Australia. "Women burned about 30 percent more fat for the two weeks following ovulation to about two days before menstruating," says study coauthor Leanne Redman. Here's why: The reproductive hormones estrogen and progesterone are at their peak then — and because they promote the body's use of fat as energy, more fat is burned off when you exercise during this time.

While going on a diet or purchasing the latest weight-loss products might seem like a quick way to shed pounds, you might not get the results you hoped for if you don't take your metabolism into account. Dieters might count fats, carbs, and calories meticulously, but in order to lose weight successfully, you have to understand your metabolism and what it does for your body.
It's one of the most frustrating realities of dieting—if you cut out too many calories, your metabolism thinks times are lean and puts the breaks on fat-burning to conserve energy, Hunter explains. Here’s the trick to keeping your metabolism revved up while dieting: Eat enough calories to at least match your resting metabolic rate (what you'd burn if you stayed in bed all day; calculate yours here). That's about 1,330 calories for a 5-feet-4-inch, 150-pound, 40-year-old woman.

Not only is vinegar great on salad, it’s also shown to “switch on” genes that release proteins that break down fat. In a study of 175 overweight Japanese men and women published in Bioscience, Biotechnology, and Biochemistry, researchers found that participants who drank one or two tablespoons of apple cider vinegar daily for 12 weeks significantly lowered their body weight, BMI, visceral fat, and waist circumference.

If you're someone who loves being cold while they sleep, you might already be doing your metabolism some good. A small study looked at how lowering the temperature while you're catching some zzzs may increase your levels of "brown fat" — the "good" fat that keeps you warm in cold temps by burning calories to generate heat. When the participants in the study slept at 66 degrees opposed to warmer temperatures, their amount of brown fat increased, while the opposite occurred during the months their sleeping areas were warmer. Turns out blasting the AC can really do you some good.
Health.com is part of the Meredith Health Group. All rights reserved. The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments. All products and services featured are selected by our editors. Health.com may receive compensation for some links to products and services on this website. Offers may be subject to change without notice. See the Terms of Servicethis link opens in a new tab and Privacy Policythis link opens in a new tab (Your California Rightsthis link opens in a new tab)for more information. Ad Choicesthis link opens in a new tab | EU Data Subject Requeststhis link opens in a new tab
Make sure you eat breakfast. Eating a nutrient-rich morning meal (like oatmeal with almonds and berries, or a spinach-and-feta omelet with a slice of whole-grain toast) shortly after getting out of bed literally wakes up your metabolism. "Eating breakfast gets the engine going and keeps it going," Hyman explains. It's hard to argue with these results: According to the National Weight Control Registry (an ongoing study that tracks 5,000 people who lost an average of 66 pounds and kept it off more than five years), 78% of those who keep it off eat an a.m. meal every day.
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