I am 62 years old...retired...I drink 16 ounces of 100 proof vodka every night between 8PM and midnight...for the last 15 years....and I do not drink in the daytime...And I function just fine...I do not crave alcohol in the daytime...I have had a liver, spleen, and kidney tests...all were fine...you simply need to know your limits, your weight, your stamina, and your physical ability to drink...everyone has a different body...there is no grid that makes everyone the same...