The answer to the question, "Do I need to change my shampoo every few months" is not a straightforward one. The popular myth out there is that you get used to a certain formula and stop responding to it after some time. In reality, the reason for your hair misbehaving after a point of time has nothing to do with the formula at all. The reason is external factors like weather change or product buildup, which is what makes your hair limp and flat after a couple of months of using the same product. Having said that, you most certainly need to relook at your hair care routine every once in a while in order to breathe life back into your hair. This is because your hair changes how it responds to products overtime, given certain lifestyle and climate changes. You absolutely shouldn't jump at the first chance of changing a shampoo, especially if you've found something that really works for your hair. Instead, take into account external changes and make tweaks in your hair care routine accordingly. Some of the ways are mentioned below...
