Don't get me wrong, I frequently use a serum on someone else's hair. Mine is so fine and easily weighed down that I haven't used a serum in years. However, it was the heat defence double action and the light weight feel of it that drew me in. I did my usual and prepped my hair with my Structure prep spray and my Tresemme Naturals mousse. After it had air dried for a little while I put a small amount of serum through before blow drying my hair straight with a ceramic round brush. Result: good hair day! It had loads of movement and was really soft without being flat or drab or greasy. I should add here that I had been careful not to put any through the roots. Just the mid lengths and ends. I did end up putting a little Tresemme 24 Hour Body spray to give it some extra oomph and a little texture (to hide the hat head later).
This serum will protect your hair up to 230 degrees so it's fine to use with GHD's. It's also a handy size to keep in your bag so you can smooth a small amount through static hat hair or control random flyaways.
It's £4.38 for 30ml and you'll be able to find it from most Boots, Superdrugs and supermarkets.
PS, I was given my serum free of charge.