A thermogenic is a broad term for any supplement that the manufacturer claims will cause thermogenesis , resulting in increased body temperature, increased metabolic rate, and consequently an increased rate in the burning of body fat and weight loss. Until 2004 almost every product found in this supplement category comprised the " ECA stack ": ephedrine , caffeine and aspirin . However, on February 6, 2004 the Food and Drug Administration (FDA) banned the sale of ephedra and its alkaloid , ephedrine, for use in weight loss formulas. Several manufacturers replaced the ephedra component of the "ECA" stack with bitter orange or citrus aurantium (containing synephrine ) instead of the ephedrine.
…The final step is to simply divide the totals by the portion size. So, let’s say the total macros of whatever dish you cook up is 150 grams protein, 300 grams carbs, 50 grams fat. Then let’s say you want to eat one-quarter of it as your portion–you’d just divide each macro by 4: 150/4 = grams protein, 300/4 = 75 grams carbs, 50/4 = grams fat. Total calories for that portion would be ( x 4) + (75 x 4) + ( x 9) = 150 calories from protein + 300 calories from carbs + calories from fat = total calories per portion. Voilà!