Emotional tears contain significantly more types of proteins, high levels of manganese, and lots of hormones, including ACTH (adrenocorticotropin) and prolactin.    From Wordnik.com.  [Serendip's Exchange -] Reference

These are thyrotropin, adrenocorticotropin, luteinizing hormone, and follicle-stimulating hormone, which are tropic hormones, and their function is to control the activities of other endocrine glands.    From Wordnik.com.  [CreationWiki - Recent changes [en]] Reference