Sodium free shampoo and conditioner?

[SilverShadows]

I'm booked in to have a keratin treatment on my hair in a couple of weeks, and my hairdresser advised I would need to use sodium free products.
Of course she could be able to sell me some for £15 each.

I'm sure I must be able to get on the high street, can anyone recommend/suggest what I should use?

I am currently using this one. I've also used this in the past, but it didn't suit my hair really.

There used to be a couple that you could buy in supermarkets, but I have noticed that they are now adding sodium chloride to their product now.

I use the Organix coconut one as I had a keratin treatment last month. Its growing out a bit now but it was so lovely not to have frizzy hair