Castor Oil Shampoo and Conditioner Set - Brimming with balancing natural extracts, this Castor Oil shampoo and conditioner set is an effective way of fighting thinning hair and giving you that volume you crave. Castor Oil is the star ingredient in both the shampoo and conditioner. Pure Parker pride ourselves on delivering natural and chemical-free products. Pure Parker do not use any parabens, SLS, color dyes or harmful chemicals and of course, Pure Parker do not test on animals.