Pls recommend a hair serum!

lately ive stopped using my hair straightner cos it makes my hair tooo straight and flat and basically it just looks lifeless and limp. ive resorted to tipping my head upside down and blasting it with the hair dryer for a few mins instead. this leaves my hair straight and makes it look a lot thicker and voluminous. i like the overall result except my hair looks a bit dry and dull with this method… i have no idea what kind of product to use on it afterwards to make it look glossy without losing the volume. pls can u recommend a good serum that i can use (and find in the UK)

thanks!! :smiley:

FrizzEase hair serum! Fekkai hair serum!