A.S.
I asked my stylist a similar question about my daughter. She said she could either pick up a treatment for me or I could go to Sally Beauty Supply and get it myself. I opted to go to Sally. The lady working there was a stylist herself and was very helpful. I thought I knew what I was buying but once I got there, I was overwhelmed at all the different options. They even have single use packets if you don't need/want a large bottle. I just went online to find their locations & there were several near me. I think you might be able to order online too. I think the packet I bought was $2.19. Good Luck!