Minimal and clean ingredients not only safe for the environment but also your scalp and hair! Also, by choosing organic, the ingredients aren’t made with pesticides. I have found that my bottles last twice as long as the aerosol cans I was using, equating to about 2 months when used regularly. Essential oils not only smell delightful, but have hair growth benefits derived naturally and directly from the plant. No Poo shelf life is about 3 months due to keeping the pure essential oils stable all while offering the best product I can!