As you might know I am trying to reformulate my sulphate-free shampoo to use less thickener.
It occurs to me that I might try using MEA, which is a base, to neutralise the primary surfactant (Akypo RLM 45, a carboxylic acid)
At the moment I use NaOH to neutralise it.
MEA is a foam enhancer as well as a thickener. I'll have to try it and see.