For a primo shampoo, what is the minimum recommended duration for scalp massage and shampooing?

The correct answer is three minutes because this duration is deemed optimal for ensuring that the shampoo effectively cleanses the scalp and hair. Massaging the scalp with shampoo for this length of time not only helps to thoroughly distribute the product but also promotes increased blood circulation, nourishing the hair follicles and enhancing overall scalp health.

During this period, the mechanical action of massaging loosens dirt, oil, and product buildup, ensuring a more effective cleansing process. It also allows the active ingredients in the shampoo to work more efficiently. While shorter durations might not adequately cleanse the hair and scalp, three minutes strikes a balance between thorough cleansing and maintaining the integrity of hair and scalp health.

It is significant to note that durations shorter than three minutes may not provide sufficient time for these benefits to take effect, potentially leading to less effective cleansing and missed opportunities for scalp stimulation.