in Health Emotional tears contain leucine enkephalin… by Chirag Chauhan December 30, 2015, 12:50 pm 433 Views Emotional tears contain leucine enkephalin, a natural painkiller. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website By using this form you agree with the storage and handling of your data by this website. *