Keep in mind a trained RMT isn't even allowed to recommend to their clients to drink water because it's outside of the scope of their practice to recommend fluids.

Under “Chair Care,” a program funded by the Centers for Disease Control and Prevention, New Mexico hairstylists are paid and trained as “trusted messengers” to promote COVID-19 and flu vaccines, especially to minority and conservative clients with low vaccination rates. Hairstylists who sign up for a six-month commitment participate in two day-long trainings where they receive tools so they can “feel more confident” talking to their clients about taking vaccines. They will be trained in motivational interviewing, COVID-19 basics, flu basics and long COVID basics.

https://www.bettertogethernm.com/chair-care