Unless you’ve embraced the ‘no poo’ method (where you eschew shampoo), you’ll be regularly pouring hair products onto your head. Shampoo, conditioner, perhaps a hair treatment mask every now and then, texturising spray, styling pomade, colour treatment …
All of these add up, not only in cost and precious shower space, but in increasing your environmental footprint. A lot of energy goes into making and transporting even the smallest of plastic bottles, with most not being able to be recycled after their use.
Many of the products on the market also expose you to nasty chemicals such as propylene glycol (which has been linked to headaches and kidney problems), triclosan (a hormone disrupter) and parabens (which can cause skin irritation), and the majority have been tested on animals.