Work the product on the palm of the hand before application.
For medium to coarse hair: apply to damp hair and leave on for 5-10 minutes. Rinse thoroughly.
For medium to fine hair: apply to dry hair, leave on for 10 minutes. Rinse thoroughly. Proceed with the shampoo.
For an extra nourishment treatment: apply before and after shampooing as indicated above

All the products in the OI line contain oil extracted from Roucou, a plant native to the Amazon, it is very rich in beta-carotene (100 times more than carrots) and has a restructuring action on hair and favors its growth.