What are the health hazards of exposure to fragrances in consumer products and cosmetics? How can our regulatory system effectively address such hazards?

What are the health hazards of exposure to fragrances in consumer products and cosmetics? How can our regulatory system effectively address such hazards?
http://www.psr.org/environment-and-health/environmental-health-policy-institute/what-are-the-health-hazards-of-fragrances.html

"Fragranced consumer products are ubiquitous. In addition to products sold explicitly as fragrance, such as perfumes and air fresheners, fragrance is added to a wide range of products such as shampoos, soaps, makeup, laundry products, household cleaners, candles, and toys. The smell of a product often guides our consumer choices. But does it also influence our health? "