It took me a long time and many "you're just trying to get the sales commission" conversations with hairdressers to finally realise that cheap shampoo and conditioner is often a false economy. There are some really good bargains out there, but you often use twice as much product with each wash because it doesn't contain such a strong concentration of ingredients, meaning you may as well have bought the expensive stuff in the first place. I'm not loyal to any specific hair products, but I have discovered two or three salon products that give results I've yet to re-create with cheaper products. Sometimes, it's worth splashing out if you know something works.
Image Source: POPSUGAR Photography / Sheila Gim