Chimpanzees test positive for alcohol: like one or two drinks a day
A study found that many wild chimpanzees are consuming alcohol by eating overripe fruits, similar to one or two drinks a day for humans.
A recent study published in Biology Letters investigated the alcohol consumption habits of wild chimpanzees in Kibale National Park, Uganda. Over a period from August 15 to 21, 2025, primatologist Aleksey Maro observed and collected urine samples from 20 chimpanzees, discovering that at least 17 of them tested positive for significant alcohol levels. This finding implies that chimpanzees may intentionally seek out overripe fruits with high alcohol content, indicating a level of behavior that parallels human drinking habits.
The study highlights the cleverness and adaptability of chimpanzees in their natural habitat as they consume these fruits, which ferment and produce alcohol. This behavior poses interesting questions about the cognitive abilities of these primates and their social interactions. The insight into their alcohol consumption could inform conservation efforts and further understanding of primate behavior, particularly regarding foraging and dietary choices.
The implications of this research extend beyond mere observation; they challenge previous assumptions about the relationship between alcoholic beverages and animal behavior. Understanding that wild chimpanzees may consume alcohol intentionally opens up new avenues for studying the evolutionary psychology of primates, their health outcomes related to alcohol consumption, and the potential cultural significance of such behaviors in wild chimpanzee communities.