|rsID Number||Major Allele||Minor Allele||Minor Allele Frequency (%)||Major Amino Acid||Minor Amino Acid|
rs671 is a widely recognized SNP, distinguished by the phenomenon referred to as “alcohol flush,” also acknowledged as “Asian Flush” or “Asian blush.”
This occurrence is prevalent among certain individuals, frequently of Asian heritage, who experience facial, neck, and sometimes shoulder reddening following alcohol consumption.
The risk ‘A’ allele of the SNP rs671 in ALDH2 is associated with reduced ALDH2 activity making carriers more likely to experience alcohol flush, and bad hangover symptoms even with a relatively low intake of alcohol 2. However other foods sources such as coffee, fermented foods, dairy products and certain processed foods can also contain high levels of acetaldehyde 3.4.
Conversely, the presence of the G allele is linked to heightened alcohol consumption due to its association with more rapid clearance of acetaldehyde from the bloodstream.
Glutathione is an important antioxidant in its own right, but is also used by also used by several antioxidant proteins as a cofactor 5.
When glutathione is hydrolysed the product cysteinylglycine is formed which has been shown to strongly bind with acetaldehyde, reducing its harmful impact and allowing its excretion from the body 6.
As such increasing glutathione intake may result in an overall increase in antioxidant capacity, and also help reduce the impact of acetaldehyde.
|Foods rich in acetlyaldehyde||
While the metabolism of alcohol is a major source of acetaldehyde there are numerous other foods which also contain significant levels with coffee and certain fermented foods being particularly rich sources. For those with reduced ALDH2 activity reducing the intake of these foods may prove beneficial 3.4.
Those carrying the A allele of rs671 are best advised to avoid alcohol altogether. Although the flushing common with carriers of the A allele may seem harmless, it is a sign that alcohol is especially toxic for these people. Although rs671 A carriers often avoid alcohol due to unpleasant side effects, if these individuals do regularly consume alcohol, their risk of certain cancers, including colon cancer increases.
Discuss this information with your doctor before taking any course of action.