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).
The best trick to keep your metabolism high after you work out is eating 20 to 30 grams of protein, preferably whey, he says. Protein takes more energy for your body to digest and absorb than other types of food; you may burn 25 percent of the protein calories you consume just by eating. After eating protein your body will stay in overdrive, which means you'll process more calories more quickly in the minutes and hours to come.