We recommend alternating these two shampoos in the same wash; the washing procedure should be started with Cold effect Shampoo and the second wash with Indian Hair Rebuild Shampoo. The Cold Effect Shampoo with hammamelis, menthol and aloe vera is purifying, combats excess oil and oily dandruff (flaking). The second wash with Indian Hair Rebuild Shampoo with nourishing and protein ingredients helps rebuild the hair fiber. This alternating wash helps to balance the scalp, preventing it from becoming extremely dry just by washing with the Cold Effect purifying shampoo. When you use just one purifying shampoo, it can drastically reduce the scalp’s natural oiliness and moisture. When this happens, the body tends to overproduce oil in an attempt to compensate. This can lead to an extremely oily scalp, which is why we recommend this procedure. Oiliness is the most common factor behind the vast majority of scalp problems. Oiliness (sebum) is not necessarily bad for the scalp; its purpose is to permanently protect its surface and the hair shaft. This means that having sebum in balance is essential for good scalp and hair health. Its fluctuations – whether in excess or deficiency – can lead to imbalances. When the rate of sebum production is higher than average, we are talking about hyper seborrhea, which means an extremely oily scalp. When the scalp has dandruff (flaking), there is often doubt as to whether the scalp is dry or oily, since dandruff can occur in both situations. The easiest way to tell if your scalp is dry or oily is to identify whether it is dry or oily dandruff. Oily dandruff is manifested by yellowish films that adhere to the scalp and is always associated with excess sebum. The scalp can also become irritated.