Hormones | Endocrine Glands | MedlinePlus

Hormones | Endocrine Glands | MedlinePlus

Hormones: a Delicate Balance

Hormones are your body's chemical messengers and are made by endocrine glands. They travel in your bloodstream to tissues or organs. They work slowly, over time, and affect body processes from head to toe. Find out why too much or too little of a certain hormone can be a serious health problem.