He served as a monk in Gaza, for many years and earned considerable controversy for his methods in reforming the local prostitutes and scandalous women. After his death, he was completely cleared of any possible impropriety or excessive zeal. … His legend states that after obtaining the name and address of every prostitute in the city, he hired himself out as a day laborer, and took his wage to one of these women at the end of the day. He would hire the woman for the night and, according to legend, spend the night awake and praying. … Vitalis was killed when a man, misunderstanding the nature of the monk's visit to a brothel, struck him on the head. Vitalis managed to return to his hut where he died. Apparently during his burial, former prostitutes came out to explain his works before processing with candles and lanterns as his body was brought to the grave.
https://www.catholic.org/saints/saint.php?saint_id=1864
Vitalis Hair Tonic