High-fiber cereal, citrus fruit, berries, garlic and lean sources of protein are metabolism-boosting foods, according to Prevention. Fiber found in berries, including strawberries, blackberries and blueberries, and in fiber-enriched cereals digests slower and leaves people feeling full for longer. Dietary fiber doesn't digest like other nutrients; however it puts the metabolism to work during digestion, which burns additional calories. Fiber is also essential for keeping insulin levels stable, preventing excess calories from being stored as fat.
Vitamin C helps metabolize fat faster and is found in grapefruit, lemons, limes and oranges, states Prevention. The minimum recommendation for vitamin C is 60 milligrams, but increasing the intake to 500 milligrams escalates fat-burning potential during physical activity by as much as 39 percent.
People following a high-protein diet burn twice as many calories due to the energy required to fully digest the macronutrient, explains Prevention. Foods such as lean beef, chicken and turkey are excellent sources of protein which help maintain lean muscle mass and burn excess fat.
Other foods that support a faster metabolism include green tea, coffee, hot chili peppers and cruciferous vegetables such as broccoli, cauliflower and Brussels sprouts, according to the Huffington Post. Drinking plenty of cold water keeps people hydrated and boosts the metabolism as it forces the body to use energy to maintain a normal body temperature.