This term is used for internal secretions from ductless glands giving Adrenaline; Thyroidine; Insuline etc. When these ductless glands become deficient, certain diseases are caused which can only be cured by making the glands efficient by the the use of appropriate homoeopathic medicines. For instance premature grey hair and baldness are caused by the deficiency of Thyroid gland. The use of Thyroid in 30 or 200 dilution will not only prevent grey hair but help in restoring natural colour. Similarly Insuline 30 or 200 should be used as an intercurrent remedy in diabetes to make efficient the glands which produce insuline.