A Romulan with blood on his face. Nanoprobes assimilating blood cells. Blood is the circulatory fluid that runs through most corporeal lifeforms in the universe. Its primary function is to carry nutrients and respiratory gases to cells and to remove waste products.
Muscle is more metabolically active than fat, and building muscle can help increase your metabolism (36, 37, 38, 39). This means you will burn more calories each day, even at rest (40). Lifting weights will also help you retain muscle and combat the drop in metabolism that can occur during weight loss (41, 42, 43, 44).
3. 1  1. Drink plenty of water. Studies have shown that by increasing the amount of water that you drink, you can also increase your metabolic rate by as much as 40%. 2  2. Drink coffee. Coffee has been shown to increase metabolism because of the caffeine content. 3  3. Drink green tea.