5 zero waste and non-toxic shampoo swaps

I remember the days when TRESemme took off. I was in high school, straightening my hair between classes in the girls’ toilets whilst applying lancome lipgloss. I was washing my hair every day because somehow it seemed that overnight it got greasy; I had no idea that was probably because of the particular products I was using, and I gave no thought to how many bottles I was throwing away every few weeks.