An interesting talk by Prof Anne Steineman from Melb Uni on the fragrant additives in products. Many are carcinogens or responsible for allergic reactions. Sadly these chemicals are not legally required to be included on MDS's.
Im surprised (or not) at the lack of research into the considerable effects of fragrant additives on the population.
https://www.abc.net.au/radionational/programs/bigideas/summer-hidden-hazards/9224354