This is a copy/paste from http://becomingpeculiar.com/why-i-ditched-shampoo-and-how-you-can-too/
-Shampoo is an unnecessary cost, and switching to a baking soda and apple cider vinegar rinse (or other similar regimen) is a very frugal and effective alternative
-Most conventional shampoos contain all kinds of harmful chemicals, including carcinogens, pesticides, reproductive toxins, and hormone disruptors. (And look out for toxic baby shampoo!)
-Because it strips your hair of sebum (the natural oily lubricant in your hair follicles that protects against infection), shampoo increases your scalp’s exposure to toxic chemicals
-Because it strips your hair of sebum, shampoo perpetuates a cycle that demands more and more products (including conditioner and more shampoo)
-Shampoo is bad for the environment
It’s just a completely unnecessary product we are told we need to use. I say ditch it make life easier and be healthier! That’s why I chose to try it.