Simple lifestyle related to food diet, nutrition, sleep, managing stress, exercise can make a big difference.
Food diet affects our body metabolic rate. When we eat, our body's cells increases the activities to facilitate digestion & absorption. This stimulation of cellular activity known as diet-induced thermogenesis uses about 10% of the total food energy consumed.
Different types of foods produce different thermogenic effects. Protein-rich foods such as meat increase thermogenesis & have a stimulatory or energizing effect on the body. This is true as long you don't overeat.
Overeating puts tremendous strain on the digestive system which can drain your energy & make you feel tired. This is why we often feel sleepy after a big meal. Protein has a much greater thermogenic effect than either carbohydrate or fat. This is why when people suddenly cut down on meat consumption or become vegetarians they often complain of a lack of energy.
Amazingly, there is one natural functional food that can increase your metabolism work similarly like protein is Virgin Coconut Oil.