if you can't find any sulfate-free shampoos, what you can do is what lorraine massey talks about in her first 'the curly girl' book --
-- do not wash your hair every day, try every other day or even 2x/week,
-- water down the shampoo,
--and you can coat the hair with conditioner and only shampoo the scalp mostly.

see if that helps!
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3a, some 2c & 3b, medium texture, porosity normal, low elasticity
washing/cowashing, conditioning, protein tx: curl junkie products
leave in:cj conditioners and treatments as leave in
styling: cj pattern pusha, cj honey butta leave in, cj cccc, cj ciab, lalsg. cj aloe fix gel is my high dews/summer HG!!
sealants - spiral solutions emollience butter, jane carter nourish & shine