Four Loko
Four Loko is a brand of flavored malt beverages produced by Phusion Projects, LLC, a Chicago-based alcoholic beverage company founded in 2005.[1] The product line features large-volume cans, typically 23.5 ounces, with alcohol by volume (ABV) concentrations ranging from 8% to 14%, equivalent to approximately four to five standard beers per serving.[2][3] Originally formulated with caffeine, taurine, and guarana alongside alcohol—referencing the "four" key ingredients—the beverage's combination of stimulants and depressants masked intoxication cues, facilitating rapid overconsumption and contributing to its reputation as a potent intoxicant.[4] This formulation led to widespread availability among college students and young adults starting in the late 2000s, with empirical evidence indicating heightened risks of acute alcohol poisoning due to underestimation of intake volume and effects.[5] In response to a 2010 U.S. Food and Drug Administration warning citing safety concerns from peer-reviewed literature on caffeine-alcohol synergies, Phusion Projects voluntarily eliminated the stimulants, reformulating Four Loko as a caffeine-free malt liquor while retaining high ABV levels.[6][7] The brand's surge in popularity precipitated regulatory scrutiny, including state-level bans on high-ABV versions and Federal Trade Commission mandates for clearer alcohol content labeling, as studies demonstrated persistent consumer misjudgment of serving equivalents even post-reformulation.[8][9] Despite these challenges, Four Loko expanded into variants like seltzers and remains commercially successful, distributed globally with ongoing emphasis on responsible consumption initiatives by the manufacturer.[10][11]