The thyroid gland is situated in the low neck in the front. It looks just like a butterfly and produces those hormones triiodothyronine and thyroxine. These hormones are responsible for controlling how fast cells burn the fuels from food to generate energy. Thyrotropin controls thyroid hormone production and release. The pituitary gland secretes it. Stress, tiredness and low energy levels are known passion killers but you can do something about it and again Ginseng and Ginkgo Biloba are great body tonics. Another great one is: