Le Petit Marseillais Anti-Pelliculaire (anti-dandruff) shampoo contains 4 essential oils: thym - recognized for it's natural cleansing properties; rosemary - known for it's purifying elements; citrus - recognized in regulating the production of sebum; chamomile - soothes the scalp. In addition to these four essential oils, this anti-dandruff shampoo also contains cedrat, which purifies the hair from the roots to the tips. It is recommended to lather the shampoo into foam and leave on the scalp for one or two minutes before rinsing.