Impact of Flushing Response on the Relationship between Alcohol Consumption and Gamma-glutamyl Transpeptidase: the KOBE study.

Individuals with an inactive acetaldehyde dehydrogenase 2 have an. elevated level of serum acetaldehyde after drinking alcohol, and this may cause an alcohol flushing response with symptoms such as facial flushing, tachycardia, headache, and nausea. Recent studies have suggested that the flushing response influences the association between alcohol consumption and various health-related outcomes. In the present study, we investigated the impact of the flushing response on the relationship between alcohol consumption and serum y -GTP levels in Japanese drinkers. We conducted a cross-sectional study of 521 Japanese drinkers (260 men and 261 'vomen) to examine the impact of the alcohol flushing response on the relationship between alcohol consumption and serum y -GTP levels. The subjects were divided into three groups according to the amount .of daily alcohol consumption. (low, <20 g; moderate, 20-39 g;. and high, >40 g). Multiple adjustments were performed with linear regression models to examine the association between daily alcohol consumption and serum y-GTP levels, adjusting for potential con- founders including the flushing response. We found that the proportion of flushers was significantly lower in the high alcohol consumption group than in the low consumption group. The results of a multivariable analysis showed that,serum y -GTP levels were significantly higher in the moderate and high consumption groups than in the low consumption group after. adjusting for all potential confounders other than the flushing response. In addition, the association between serum y -GTP levels and alcohol consumption was unchanged after adjusting for the presence of the flushing response. In conclusion, serum y -GTP levels increased with increasing alcohol-consumption regardless of the flushing response. Screening for heavy drinkers using serum y-GTP levels was very important to prevent alcohol-related diseases or health problems in health examination.