Source: Japan Society for Dietary Ethics Journal Vol. 24 No.3 (2013)
Pollens may cause allergy symptoms such as sneezing, runny nose, and itchy eye. The immune system protects the organism from invasion by foreign agents. However, sometimes, the immune response is directed to harmless substances such as a pollens and certain foods, causing allergic reactions. The number of individuals suffering from allergies has been increasing in recent years due to various factors such as changes in lifestyle habits, diet, increased exposure to allergens found in natural environments, and improved hygiene.