How often should I change my shampoo?
If you are using professional shampoos, you may never need to. On the other hand, water conditions can affect how some products react with your hair. Differences in water condition may prompt you to change to a different kind shampoo. If you travel frequently, you may need several different products depending on the local water conditions. Also, medication you take orally comes out in the hair. If you have changed prescription drugs recently, you may need to switch shampoos and or styling products. If you find that your shampoo is fine for a few days and then your hair becomes weighted down or coated, you are using a poor quality shampoo and/or conditioner that is unsuited for your hair type! Even the time of the year can affect your hair. In severe climates, many people spend the winter months in dry, heated homes. Other times of the year it may be humid.