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Our bodies need dietary fat—particularly healthy oils—in order to lose weight and function properly. The right kinds of fats and oils help quash hunger, maximize your metabolism, and speed nutrients through your body. Healthy monounsaturated fats like olive oil can actually help the body to burn calories. Extra virgin olive oil may also increase blood levels of serotonin, a hormone associated with satiety. Plus, olive oil is also loaded with polyphenols, antioxidants that help battle many diseases such as cancer, osteoporosis and brain deterioration.

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.

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."


Why does eating lots of fish rich in omega-3 fatty acids (salmon, herring, and tuna) help amp up metabolism? Omega-3s balance blood sugar and reduce inflammation, helping to regulate metabolism. They may also reduce resistance to the hormone leptin, which researchers have linked to how fast fat is burned. A study in Obesity Research found rats that ingested large doses of fish oil while exercising lost weight. Take omega-3 fatty acid supplements; Hyman recommends 1,000 to 2,000 milligrams per day. Hate the fishy after-burp? Try flaxseed oil, walnuts, or eggs fortified with omega-3s. Or check out supplements (by brands such as Nordic Naturals) that have no fishy taste.
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.
It takes the body extra effort to break down whole grains than more refined and processed grains, like the flour ordinarily used to make bread and pasta. You can help keep your metabolic rate elevated by consuming foods that the body has to work harder to digest. Your go-tos are whole foods that are also rich in fiber. We’re talking brown rice, oatmeal, quinoa, and sprouted grain bread.
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.
The key to this metabolism diet trick is to start slowly. First, add non-exercise movement to your day. Walk more often, take the stairs instead of the elevator, carry your groceries home from the store or add a few easy exercise sessions to your routine. ​Use an activity tracker to increase your daily step count and increase your total calories burned per day.
While nutritionists agree that there is no magic food to revving up your metabolism, getting enough exercise, especially the right kind of exercise, is key. Experts suggest strength training two or three times to build lean muscle mass. “A pound of muscle burns up to nine times more calories than a pound of fat,” says nutritionist Lisa Stollman. “Lifting weights is a great way to build muscle mass.” However, the point is not just to build lean muscle mass, but to maintain it. “As we age, we start to lose muscle,” says Pincus. “Strength training not only builds muscle groups to burn more calories, but also helps preserve them and prevent loss.” Check out these other nutritionist-approved ways to speed up your metabolism.
Whole foods contain an assortment of vitamins, minerals, and nutrients that act as metabolic spark plugs, giving you the energy to get up and move around. That’s the theory behind increasingly popular diets like Paleo, which eschews processed foods in favor of lean meat and vegetables. Without preservatives and unnecessary crap in your food, your body will burn clean, and that translates to a faster-moving metabolic engine.

Bring on the funny cat videos — they're good for your health, according to researchers. No, you won't get the same calorie-burning results as you get from your spin class, but laughing does give your metabolism a small boost. Astudy published in the International Journal of Obesity found that genuine laughter increased both energy expenditure and heart rate by 10-20 percent above resting values. Another study found that watching cat videos in particular can boost your energy level. Guess you know what you're watching on the treadmill from now on.
Whole grains, vegetables, fruits, beans and legumes, fresh herbs and spices provide the proteins, carbohydrates and fats that give you energy and even blood sugar levels. Healthy fats (olive oil, avocado, fish oils, seeds, nuts, soybeans) promote longer-lasting, stable energy levels. Lean proteins (fish, soy foods, white meat poultry, lean meats and low-fat dairy) offer essential proteins for better digestion and muscle building.

Muscles are fat-burning furnaces, so be sure to do enough resistance training to build and maintain them (these fast workouts tone your whole body in 30 minutes), and follow your workout with a healthy meal or snack that contains protein, carbohydrates and fat. Building new muscle raises your Resting Metabolic Rate (RMR) so you'll burn more calories every day.

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