Some hard of hearing Ancient Greeks made Arsenic mean Masculine. Selenium I havent heard of except for sheep having a bad-fleece-day, a bad movie, and finally its discovery by its smell and a whimsical idea of naming it after the Moon. Yes selenium is in "Head and Shoulders" https://www.headandshoulders.co.uk/en-gb/healthy-hair-and-scalp/non-category-dandruff/head-and-shoulders-anti-dandruff-shampoo-ingredients http://lessonpeer.com/drhillteach/Moon%20in%20the%20Periodic%20Table/Moon%20in%20the%20Periodic%20Table.mp4 http://lessonpeer.com/drhillteach/Moon%20in%20the%20Periodic%20Table/Moon%20in%20the%20Periodic%20Table.mp3.mp3