The phrase "thermic effect" refers to how the body uses energy to digest food and absorb nutrients. When we eat, our body uses energy to break down the food, which increases our metabolism and helps in burning calories. Full definition
For example, a 750 calorie meal eaten in 10 minutes would result in a higher thermic effect of food than the same 750 calorie meal eaten in six equal portions of 125 calories at 30 minute intervals. (shapesense.com)
And the more protein and fibre you eat, the more you will increase your metabolism too because of their higher thermic effect of food. (rachaelattard.com)
A caffeine / ephedra mix primes the body to increase thermic effect (calorie burning), and the time - release carb intake should help stimulate insulin sensitivity. (muscleandbrawn.com)