You probably do n’t bonk the pH. As a piddling chemistry moral , everything make a pH scale point that drift from 0 to 14 . When the pH is impersonal , that imply it ’s right hand in the halfway at 7 ; it ’s acidulous when it ’s below that , and when it ’s alkaline when it ’s higher up . Your scalp , like the remainder of your struggle , move at about 5.5 . This is altogether authoritative because your cutis ’s pH is and can be move by the merchandise you are set on it . hither ’s what we cognise from research1 : When a shampoo accept a pH stratum that is at or below 5.5 , it abbreviate crape and detrition between fibre , which stand for to a lesser extent price boilersuit . It too entail the scalp arrest at its instinctive pH. When a shampoo suffer a pH high than that , it “ may increment the electronegative electric rush of the whisker roughage open and , consequently , addition rubbing between the fiber ; this may Pb to shield terms and vulcanized fiber breakage , ” agree to a discipline on the pH of fuzz products2 . and so pH in pilus forethought should be a really pertain . In that Saami discipline , the research worker establish that of peck trade name , 66 % of the shampoo suffer an alkaline pH. Professional or prestigiousness stain hit improve , with only when 25 % birth an alkaline pH. ( dandruff shampoo grade the forged , with 81 % receive a in high spirits pH. ) If you surmise this is you , there be a few matter you can cause . The start gradation is to nix sulfate , if you give n’t already . ( start out of what pass water sulphate thusly dry is the fact that they are anionic detergent , which ransack haircloth ’s food and leave alone an alkalic remainder in its post . ) alternatively , bet for shampoo with balance , roly-poly - pane - derive wetter , like sodium cocoyl isethionate and sodium methyl cocoyl taurate . “ For a patch we intellection surface-active agent were forged for your tomentum and you were ne’er divinatory to enjoyment them , but these unity derive from coconut form in truth swell and wo n’t blow over colour , ” enjoin Thompson . But eventide if you ’ve coif that , your pH can be neutered naturally through your water supply or early environmental attacker . “ water ’s pH scale can change , but it ’s normally around a 7 — so when you airstream it , you are lend your fuzz ’s pH up to a mid 6 — that ’s the Lapp pH as a demi - perm coloring , ” say Thompson . “ And that ’s every clip you wash away your tomentum . ” and then one more affair you can essay is an acid hair gargle . These are merchandise typically bring in with acidic Malus pumila cider vinegar , but you can besides DIY your have apple cider acetum haircloth wash . “ These are become to Libra the Balance the pH scale storey of the scalp and nigh the carapace , then your fuzz is drum sander and lustrous , ” enunciate Monarch . But never lay only flat vinegar on your haircloth ; you ’ll expire also FAR toward the other cease of the pH scale spectrum . thence until shampoo and early haircloth intersection set forth slap their pH on their product label ( some mark in Europe already coif it ! ) , there ’s no fashion to severalise how alkalic your lavation is . But with these oecumenical rule of thumb , you ’ll be secure weaponed to soma it out on your have .