Personally, I use natural ingredients such as vinegar, coconut oil, honey or aloe vera to make homemade hair masks instead of buying commercial hair products. These natural ingredients help nourish and moisturize the hair and they're better for the environment, because they don't contain harmful chemicals that can harm aquatic life when washed down the drain. Additionally, reducing the frequency of hair washing can also be a sustainable hair care practice as it helps to conserve water and reduce the amount of energy used to heat water.
Use less water by washing less often! You can save 655 litres of H2O per week by having showers speedy showers under 5 minutes. If you are in the shower, turn the water off while you are lathering or shaving. Save water and product from going down the drain. You can also switch to a low-flow showerhead for efficient water consumption. Other actions I can speak to are plastic-free hair care options like switching to bars, visiting a refillery, or making your own DIY hair care options. Also researching the companies you support and consider the additional sustainability initiatives in their operations alongside the specific eco-friendly aspects of the products you choose. Sustainable product ingredients. Consider where the maker sources those ingredients, how they are harvested, transported and the sustainable and ethical supply chain along the way.