People with PFAS are often allergic to birch, grass, and ragweed pollen. The ACAAI website explains that Oral Allergy Syndrome (OAS) happens when the immune system reacts to proteins in both pollen ...

"So this is a birch tree, and so some people who are allergic to the pollen that's produced from this tree and released in the spring time can have something called oral allergy syndrome (OAS).

Allergies to the pollen of trees and plants are common ... allergies alongside their sniffles. Pollen food syndrome (also known as oral allergy syndrome) is perhaps more common than you’d ...

Some dairy-rich foods like yogurt and aged cheese may contain histamines, which can trigger an allergic reaction in sensitive ...

People with PFAS are often allergic to birch, grass, and ragweed pollen. The ACAAI website explains that Oral Allergy Syndrome (OAS ... vegetables or tree nuts. This cross-reactivity makes ...