Have to say I've never bought supermarket branded shampoo. I have tended towards professional makes,like Charles Worthington, Trevor Sorbie. Years ago when Vidal Sassoon brought out his range, I bought it all the time. Had many compliments about my hair.
I'm stuck between styles at the moment. Decided to start growing out my pixie cut, but recent warm weather has made me realise why I went short in the first place. So it's getting the chop again, much easier to look after. I have really thick straight hair, which gets out of control when it's longer, starts kinking in strange ways & goes lank very quickly.
It was just that I saw something about it being better for your skin if you use PH balanced soaps & shampoos. I'd never given it much thought before then.