Very dry hair

[stillstanding51]

Looking for High street/Amazon recommendations ideally…
So, hair had a Kerastraight treatment which didn’t really do much at all, followed later by highlights
Was told to use Olaplex 4,5 and 6 but this is making my hair feel extremely dry and brittle
more so on each use. Hair has very little movement too
I tried a bleach London mask which also didn’t make any difference so I’m thinking protein overload maybe?

Ive shoulder length very fine thin hair which is easily weighed down
Any nice recommendation which don’t cost the earth and are easily available. I’m assuming I need moisture rich products?
Many tia

One thing that has helped me when my hair is really dry is using a treatment before shampooing and leaving it in for about 10 mins, then shampoo and conditioner as normal. Makes it so soft.

Davines OI all in one hair milk is great. You can get a small 50ml size to start to see if it suits you.

Have you tried elasticiser pre wash? Leave it on for an hour or more before washing.
then wash only with a cleansing conditioner. The best one I’ve found is Tigi.
Then on the daily, feed with inkey list hyaluronic acid for hair and a few drops of squalene.