The RF 80 anti-hair loss treatment is a concentrate of plant extracts and natural essential oils that promotes healthy hair growth and slows down hair loss. It directly responds to all factors responsible for reactive hair loss. How to use - Apply all of the vial, section by section, using the applicator tip, to a clean scalp. Massage your scalp to make the product penetrate. Do not rinse. Frequency of use: 1 time per week for 3 months.