The term alcohol flush reaction, also known as Asian flush or Asian glow, refers to the red face commonly experienced after consuming alcohol. This happens because of a genetic ALDH2 enzyme deficiency common in, but not exclusive to, people of Asian origin.

The functionality of the ALDH2 enzyme is a crucial element in breaking down a toxic metabolite of alcohol called acetaldehyde and it's deficiency causes a toxic buildup whenever alcohol is consumed. This results in a variety of unpleasant reactions that include facial flushing, headaches, nausea and a general feeling of discomfort.

Read our 'Ultimate guide to Alcohol Flushing/Asian Flush' for more information.