Fruits acids Retrò cream is an exclusive hair strengthener which helps to improve your hair's structure. Capillary Fruits acids Retrò cream makes your hair easy to comb, soft and shiny all the way up to the stem making it more resistant. Wash your hair with the specific Retrò shampoo and rinse. Put a small quantily of shampoo on your hair and comb it in all the way to the very end. Let your hair absorb the shampoo for 5 minutes and rinse again.