Phthalates are a type of chemical used as plasticizers to make plastics more pliable. There has been a lot of research on the endocrine-disrupting effects of phthalates. Your genetic variants may impact whether phthalates are a problem for you.
Allergies are usually due to a mix of genetic susceptibility and being exposed to certain triggering molecules. Several different gene variants have ties to an increased risk of grass pollen allergies.