Fruits

Fruits like Grapefruit, Guava, Honeydew Melons, Apricots, Blackberries, Strawberries, Tangerines, Oranges, Peaches, plum, Raspberries, Damsons, and Melon Cantaloupe. They are some of the fruits, which can help in improving your metabolism rate.
It has to be mentioned here, that fruits help in weight loss. Not only by way of improving the metabolism rate. But there are some fruits, like oranges, which are rich in Citric acid. Which is simply great for weight loss.