What is Thermopure? Our formula of essential vitamins and popular ingredients including green tea and black pepper extractsthatll boost your everyday wellbeing, with caffeine increasing endurance performance,1 and chromium supporting your metabolism to help you on your weight-loss journey.2 Thermopure is our powerful thermogenic formula, to help you reach your goals. What is a thermogenic? The term thermogenic literally means to produce heat, and is commonly applied to supplements which increase heat through metabolism.2