The prevalence of fragrance sensitivities were investigated in the United States, United kingdom, Australia and Sweden by Steinemann (2019) and results included:

·         75.8% of Autistics are sensitive to fragrances

·         26% of the general population report being diagnosed with asthma/asthma like conditions and 57.8% are also fragrance sensitive.

Scents that were particularly problematic included:

·         Air fresheners and deodorisers (54.8%)

·         Being in a room with recently cleaned products (53.8%)

·         Being near someone wearing a fragranced product (56.5%)