Coffee and green tea
Many studies have shown that coffee and green tea speed up metabolism, as well as providing other health benefits: they possess a great amount of antioxidants, help lower blood sugar level, help to burn more fat, and reduce the signs of cellulite.
Apples and pears
Apples and pears can be great allies when it comes to losing weight, not only because of their low caloric content but also because these two fruits can boost your metabolism. This is supported by a study conducted at the State University of Rio de Janeiro, which confirms that women who ate three apples or small pears a day lost more weight than those who did not.
Spices like black pepper, mustard seeds, garlic powder, and ginger can keep your metabolic rates high. It is proven that people who incorporate spices into their diet can burn up to 1,000 more calories daily.
Citrus fruits like oranges, grapefruits, and lemons also help to burn fat and keep your metabolism high. In addition, because of the high amount of vitamin C, citrus fruits regulate the level of insulin.