Many factors influence the decrease in B-PeTH levels, such as ending alcohol consumption and overall health status. Generally, B-PeTH levels begin to decrease within a few days after stopped alcohol use and can return to normal levels within about 1-4 weeks, depending on the amount and duration of alcohol consumption and individual health-related factors. It is important to note that this is a generalization, and individual differences can be significant. For an accurate assessment, it is recommended to perform a laboratory test that measures changes in B-PeTH levels.