Prolactin (PRL) is the most versatile and diverse of all the pituitary hormones in its physiological actions in hair growth, sebaceous gland activity and mammary gland alterations in mammals, spermatogenesis and its effects on accessory reproductive glands in males. There are several factors which are involved in the regulation of this hormone. The role of excitatory amino acid (EAA) is very important in the regulation of all the hormones including PRL. EAAs contribute for the regulatory processes... Mehr