People who ate a salad topped with a spoonful of dressing had similar levels of thyroid hormones to people who hadn't eaten for 24 hours.

If you like the idea of a thyroid-boosting snack, try a spoon of apple cider vinegar on your salad, which has been found to increase metabolism by 40 percent.

The American Heart Association recommends a moderate amount of alcohol as beneficial (up to one drink per day for women, or two up for heavy drinkers). However, if you’re pregnant or breast-feeding, have a liver disease, or don’t drink, it’s best to avoid alcohol completely. Those who drink should choose lower-alcohol drinks, like wine, beer, or less than half a glass of dry sherry.

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The goal: Eat four to six meals that are small-sized (around 300 calories), are well spread throughout the day, and are either a smoothie, salad, or soup, he explains. This will keep sugar and calories stable, which can work wonders for your metabolism.

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When your sugar levels get too low, the body will start slowing down your metabolism, and you’ll be storing more fat than cutting it. The bottom line, he says, are the foods you avoid. “Eliminate sugar and you increase the efficiency of fat loss,” he says. According to the World Health Organization, worldwide obesity has nearly doubled since 1975. That’s not a great trend, and it doesn’t appear to be slowing down, either. So it is always a good idea to use your training jump rope to keep your metabolism active.

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