But, Bustillo cautions against hanging too much hope on this: “Many companies that sell the ‘after burn’ or ‘metabolic workouts’ are just utilizing a marketing strategy with [a grain of science behind it],” he says. “They're not technically lying, because training can increase BMR [in the 24 hours post-workout], but it's not by more than 200-300 calories on average.”

Sleep, sleep, sleep: Getting poor sleep impacts our hunger hormones, D’Ambrosio says. Studies have also found that less sleep was associated with a higher BMI. “Less sleep increases our ghrelin – our hunger hormone – and decreases our leptin – which helps us feel full,” she explains. “If you are looking to burn calories more efficiently and moderate your consumption, be sure to get enough sleep.”

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.


In a small German study, subjects who drank 16 ounces of water at a time experienced a 30 percent increase in metabolic rate during the following hour, burning an extra 24 calories. The researchers recommend cool water because the body expends extra calories warming it up to your body temperature. Water's not the only healthy drink. We sipped our way through dozens of smoothies, teas, and juices to find this list of the most delicious and nutritious liquids.
Dried goji berries might be a staple of every health food store, but it’s worth looking for them a couple aisles over in the tea section. Lycium barbarum, the plant from which goji berries are harvested, is a traditional Asian therapy for diabetes and other diseases, but it also boasts a slimming effect. In a study published in the Journal of the American College of Nutrition, participants were either given a single dose of L. barbarum or a placebo after a meal. The researchers found that one hour after the dose, the goji group was burning calories at a rate 10 percent higher than the placebo group, and the effects lasted up to four hours. Bonus: Most goji teas are mixed with green tea, further boosting your calorie burn.
If you're cutting calories to lose weight, add 200-300 to your daily intake once in a while, says Amanda Bonfiglio Cunningham, a senior Yoga Medicine instructor. "The body will get used to a calorie deficit diet, adjusting by slowing the metabolic rate. By allowing yourself a day of indulgence (not overindulgence!), you're creating a healthy balance," she explains. "The extra calories raise leptin production, a hormone that regulates appetite and energy. This rise triggers thermogenesis, the body's natural tendency to create heat, which results in burning calories." Pass the dessert menu!
Instead of ditching carbs or going low-fat, try a diet that's rich in veggies, beans, and legumes to increase your metabolism — and keep your blood sugar from spiking. "Many people think weight is all about calories in, calories out, but quality also matters," says Aunna Pourang, M.D. "[In a 2012 study], low-carb diets showed the most increase in metabolism, but also showed an increase in the stress hormone cortisol. This is why scientists concluded that the low-glycemic diet worked the best."
Try to get 7-8 hours of sleep every night. A recent study from Case Western Reserve University found that, on average, women who sleep for 5 hours or less per night are 32 percent more likely to gain weight and 15 percent more likely to be obese than those who get at least 7 hours. If stress is keepig you up at night, try these 10 simple tips to reduce stress.
Caffeine may provide a bit of a boost to the metabolism, especially when ingested before exercise, but no amount of metabolic boost can burn off the empty calories that energy drinks supply. According to one study published in Mayo Clinic Proceedings, a typical energy drink serves up a quarter cup of sugar—calories that hit your body all at once and trigger fat storage. If you want to burn calories, try the miracle beverage known as tap water. According to a study published in The Journal of Clinical Endocrinology and Metabolism, after drinking two tall glasses of water (17 ounces), participants’ metabolic rates increased by 30 percent.
Skimping on sleep can derail your metabolism. In a study at the University of Chicago, people who got four hours of sleep or less a night had more difficulty processing carbohydrates. "When you're exhausted, your body lacks the energy to do its normal day-to-day functions, which include burning calories, so your metabolism is automatically lowered," explains Peeke.
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