8 Ounces. Doctor in a Box has one major goal, to make YOU look better. When your hair looks good, you look good; and when you look good, you feel better. We strengthen hair, soften it, condition it, make it smell nice and make it shine. We are the hair professionals. You will look better and feel better because The Doctor Is In. Are you tired of flaky and itchy scalp? Doctor in a Box Dual Action Tingling Shampoo & Scalp Stimulator is the solution. Its therapeutic system eliminates the recurrence of itching and irritation that's associated with dandruff. It's the perfect remedy for hair and scalp! Invigorator Complex Stimulates Scalp and Promotes Growth. Soothes Dry Itchy Scalp. Reduces flaky dandruff buildup. Detangles hair. Reaches deep into hair follicle to deep clean and stimulate. Rebuilds and nourishes. Powerful "tingling" action gives you a scalp massage in a bottle. Tingling massage increases blood flow to the scalp for more stimulation and growth. 2 in 1 Dual Action.