http://www.hairlossremedy.net/phbalanceandhairloss.html
http://www.nexxus.com/expert_hair_care_advice/hair_information_chemistry.html
http://www.recipezaar.com/132649 Here is a recipe to help restore acid balance
Specifically: Here is an example. If you never use protein, and only use acid based products...eg. AVC, then your hair can become too soft and mushy...and if your hair becomes deficient in protein, that is unbalanced. Too much protein and your hair can become too hard...too little sulphur and your hair can become thin and shred easily. Too much and it can dry right out, and be difficult to comb. Hair is composed of protein, sulphur, fats (from the scalp)...etc. and the scalp normally should have an acid mantle rather than an alkaline mantle . Some products are Ph balanced and some are not. Some products are very alkaline. You can look into this deeper by doing some searches on the net re: Hair composition and on acid mantle, protein bonds, sulphur bonds, oils and fats: in re: your hair. It is healthier for hair to have a balanced ph by using products and treatments that maintains the best ph balance for your hair. Hope this helps.
So you would not just focus on adding just one component and totally disregarding the other. There are many types of protein as well, and they are not necessarily interchangeable. eg. plant protein, hydrologized protein, etc. etc. Also check out "ph balance" "alkaline based products...eg. some relaxers....acid based...some relaxers etc. on your search. bonjour