Works from first usedermatologist testedwhen dandruff appears you want to get rid of it fast thats why neutrogena has developed tgel shampoo for dry hairneutrogena tgel shampoo for dry hair starts working immediately to relieve the itching and flaking of dandruff without drying out your hairneutrogena tgel has been specially formulated for maximum effectiveness on your scalp yet its gentle enough for everyday use its rich lathering non drying formula removes build up on scalp