Boots Botanics heat protection shine serum £3.99
I can tell you this, you really need to try it! I use it once a week a little pea shape after I towel dry my hair and rub into the ends working it up to the roots.
And this makes my hair so fresh, clean and soft, people always compliment my hair after I use it. I was so surprised. The shine, it's a healthy clean shine.
I've been using it for over a year and still have plenty left, so is by far value for money. I would have no hesitation in re-buying this.
Have you heard of it/tried it?