Why You Should Definitely Test Your Shampoo's pH
Most shampoos won't tell you what their pH is on the label.
And it's little wonder that they don't: studies on shampoo pHs have revealed how most shampoos have a pH that is too alkaline for hair. When a shampoo's pH is too high, it sets off the Static-Frizz-Tangle Cycle in your hair, which ultimately leads to breakage. And when the pH is too high for your scalp, irritation and the risk of infection go way up.
A lot of your worst experiences with shampoos could come down, not to the usual suspects like sulfates but to using a shampoo with the wrong pH for your hair. The role shampoo pH plays in breakage alone gives you every reason to play detective with your shampoo - if only to keep your length retention on course.
DHA Hair Care Experts