Designed to promote a balanced scalp environment, Philip Kingsleys Density Preserving Scalp Drops deliver an innovative active complex to condition and nourish the hair and scalp. n The lightweight serum is enriched with caffeine, azelaic acid and anti-microbials, gently exfoliating to help minimise the appearance of oiliness and dandruff. Suitable for sensitive scalps, the drops offer a cooling effect upon application to leave your hair and scalp feeling refreshed.