Iroiro Natural Premium Semi-Permanent Hair Colors are the first and only natural vibrant hair color with natural ingredients. Vegan simply means it does not contain animal bi-products however it does not mean harsh chemical free. Our colors are truly vegan because our colors do not contain petrol based chemicals. Our colors do not contain following harsh chemicals and synthetic ingredients commonly found in many semi-permanent hair colors today: Propylene Glycol (petro chemical used in anti-freeze & brake fluids), Methylisothiazolinone / Methylchloroisothiazolinone (synthetic preservatives named Allergen of the Year in 2013), PEGs (synthetic chemicals classified as a known human carcinogen), Methylparaben (synthetic preservative can act as potential hormone disruptor) peroxide, ammonia, PPD and alcohol.