I don't believe in contemporary "physical dependency" -- withdrawals as a correlative of "tolerance mitigation-of-effects as down-regulation" is sorta inherently based on resources, to the very physiology / functionality. Alcoholic-hangover is the entity having overloaded very specific chemicals (such as oxygen, carbon, and -- relevance depending on the availability of magnesium -- the production of oxalates; or even, also, "calories"), counters, and to high insulinogenics, being obvious: antioxidants, nutrients.. and timing; the beverage is really cerebral and fascial, and has benefits of quick calories, and cleansing cerebrospinal fluid (so, performance)..