Over the years, adolescent alcohol consumption has been associated with a multiplicity of adverse psychosocial and behavioral consequences, including antisocial predispositions, mental health challenges as well as school difficulties (Mason & Spoth, 2011). Additionally, as acknowledged by these authors, adolescent alcohol use not only interrupts normal processes associated with brain development but also plays a substantial role in increasing the number of homicides, suicides and accidents among this group of the population. While most scholars are in agreement that the negative outcomes of adolescent alcohol consumption are not basically confined to the teen years but do extend into adult life (Khan, Berger, Wells, & Cleland, 2012; Mason & Spoth, 2011), only a few studies have bothered to assess and evaluate how use of alcohol in adolescence occasions adverse outcomes later in life (McCambridge, McAlaney, & Rowe, 2011). Consequently, the main purpose of this paper is to expand the knowledge on unfavorable alcohol outcomes by reviewing and synthesizing current professional literature detailing how alcohol consumption during adolescence causes adverse consequences in adulthood. Literature Review A systematic review aimed at investigating the possible effects of any behavioral measure of adolescent alcohol use on any adult outcome found dependable proof that high alcohol use during the late teen years continues into adulthood and is positively correlated with a range of consequences in adulthood, including dependence, early death among men as a result of car accidents and suicides, and burden of alcohol related diseases such as liver cirrhosis. This systematic review also found that, although there are several studies associating adolescent alcohol use with adult physical and mental health challenges, the empirical evidence so far achieved is of unsatisfactory quality to necessitate causal inference or presumptions at this juncture. The study concluded that more empirical research needs to be undertaken to investigate if alcohol use during adolescence is actually related to the physical and mental health challenges presenting during adulthood (McCambridge et al., 2011). Another study using a sample of 208 rural teenagers of between 11 and 21 years to investigate alcohol use, negative alcohol-related outcomes and subjective wellbeing in teen years found evidence of a positive relationship between alcohol consumption and subjective well-being in adolescence, hence reinforcing a widely held conception that subjective well-being indicators (e.g., material conditions and personal character) predict alcohol consumption during adolescence. The study also found that alcohol consumption during late adolescence is positively associated with alcohol problems in early adulthood, with findings documenting some of problems as elevated risk to develop problem drinking and alcohol consumption disorders, functional problems due to disruption of brain maturation during adolescence, and increased uptake of alcohol as a coping mechanism to deal with depressive symptomatology (Mason & Spoth, 2011). In yet another study, researchers used 10,783 adolescents and young adults sampled from a population of Whites and African Americans to investigate the relationship between adolescent alcohol consumption and adulthood sexually transmitted infection (STI) risk in Ameri