As for our home range products like room diffusers, scented candles and dishwashing liquids, a global legislation has come into force. It dictates that all products containing a concentration of perfume/ fragrance that exceeds a certain percentage must be labelled with a warning. This is regardless if the fragrance consists of natural essential oils or synthetic perfume. Even if the amount of fragrance oil included in our room diffusers contributes to about 19% of the total content, and the fragrance substance which is the requirement for the labelling is only 2% of the total content, there must be a warning label with standardized phrases of different warnings/ cautions.