THE COSMETIC REPUBLIC Hairdressing Products. MULTI-VITAMIN Shampoo. The ideal shampoo for both hair loss problems and fine hair, without volume and with a brittle tendency. With microencapsulated keratin and vitamins A, B, C, E and F, this shampoo prevents premature hair loss. Designed for daily use, apply it accompanied by a gentle massage with the fingertips on the scalp for proper stimulation of blood circulation.