Is the treatment safe to use on shaved / short hair? June 07, 2022 10:28 Yes, The key is to apply the spray onto the scalp so the active ingredients can get to work deep on your follicles. Related articles Is the treatment safe to use on Afro-carribean hair? Can I use a hairdryer with my products? Is the treatment safe to use on long hair? What is the Dense Wash and Gro routine? Comments 0 comments Please sign in to leave a comment.