Dietary Supplement This formula was designed by David Christopher M.H. to temporarily nourish the thyroid gland. This product should be used for 6 to 12 weeks or until you feel that your energy level is back to normal. Avoid taking this product after 2 pm. as it may interfere with normal sleep patterns. This formula contains Guarana, Siberian Ginseng, Fo-Ti, Gotu Kola, Mullein and Kelp.