3 x Triple Eight Caffeine Shampoo Keratin Protein Hair Growth - 250ml Bottle. Triple Eight Caffeine Shampoo – 250ml Contains: 3 x 250ml Triple Eight brand Shampoo contains caffeine known to stimulate hair roots as well as promoting the growth of hair, combines with keratin – one of a family of fibrous structural proteins and the key structural component of hair, known for protecting and strengthening hair. Paraben FreeContains Strengthening Keratin ProteinDermatologically testedFor all hair types Known to stimulate hair roots during washing.