Iron deficiency affects more than 1 in 5 women in the U.S. Being deficient in essential minerals can show up in all kinds of ways, such as fatigue and anemia, but an iron deficiency can also be a blow for getting into your skinny jeans with relative ease. See, your body can’t work as efficiently to burn calories when it doesn’t have what it needs to work properly. A cup of lentils, it turns out, provides over a third of your daily iron needs. Legumes like lentils also have been shown to drive down bad cholesterol and blood pressure.
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.
When you're trying to ramp up your metabolism, eating fats might sound scary — but you just have to eat the right kind. Focus on a balanced diet of protein, carbs, and healthy fats like avocados, nuts, and olive oil to see a change. "I told my friend to start her day with high-fiber cereal, plain yogurt, and a handful of walnuts, or a hard-boiled egg and a slice of whole-grain toast topped with avocado. Then eat this same balance of protein, carbs, and fat for lunch and dinner," says Eugenia Gianos, M.D., co-director of the Center for the Prevention of Cardiovascular Disease at New York University Langone Medical Center. "She felt full between meals, had fewer cravings, and because good fats and fiber work in tandem to boost metabolism, she was able to drop the extra pounds and keep them off. It's a strategy I've seen work over and over again in my practice."
Activity. Aerobic exercise helps you burn calories, and strengthening exercises (resistance training) can help you build and maintain muscle mass. Having more muscle causes you to burn more calories even while at rest (your resting metabolic rate). Keep in mind that building more muscle to burn calories is much more difficult than burning calories through aerobic activities.
You might want to think twice before ditching dairy if you’re trying to lose weight—despite what your Paleo-preaching CrossFit friends tell you. Cheese is a satisfying, portable, and inexpensive food that’s packed with calcium, vitamin D, and protein. “Calcium can also promote weight loss because it helps maintain muscle mass, which boosts and helps maintain metabolism, helping you burn calories more efficiently throughout the day,” says Tanya Zuckerbrot, RD, author of The Miracle Carb Diet: Make Calories & Fat Disappear—With Fiber! That doesn’t mean you can help yourself to a cheese-drenched casserole, though. Work cheese into fiber-rich snacks to make them more satiating.
Even when you’re at rest, your body is constantly burning calories. In fact, 75 percent of the calories that you burn each day are being used up just keeping you alive. “Resting metabolic rate” is much higher in people with more muscle, because every pound of muscle uses about 6 calories a day just to sustain itself. If you can pack on just five pounds of muscle and sustain it, you’ll burn the caloric equivalent of three pounds of fat over the course of a year.
Studies conducted at The Nutrition Institute at the University of Tennessee suggest that consuming dairy may help your body metabolize fat more efficiently. Other studies have shown that increased calcium intake from dairy products (though not from supplemental calcium carbonate) caused study participants to poop out more fat as opposed to it sticking around on the body.