Exposure to Chemical from Babies Linked to Aggression

 

A recent study has found that hexadecanal (HEX), a chemical abundant on babies’ heads and emitted from human skin, saliva, and feces, may influence aggressive behavior in humans. Researchers discovered that while HEX appears to increase aggression in women, it suppresses aggression in men. The study involved exposing participants to HEX during a frustrating game scenario and measuring their aggressive responses. Using brain scans, scientists observed changes in neural activity linked to aggression. Although the study suggests HEX modulates behavior, experts urge caution, noting that more research is needed to confirm its role as a signaling pheromone.


Tristram Wyatt, a biologist at the University of Oxford who specializes in the evolution of pheromones and was not involved in the study, describes the authors' explanations for HEX’s impact on human behavior as speculative in an interview with *Science*. He also notes that psychological experiments can be challenging to replicate and criticizes the study for not demonstrating that humans emit sufficient levels of HEX to trigger an olfactory response. Wyatt advises a more rigorous approach and concludes, “It’s intriguing research, but I remain cautious about its significance.”

"Exposure to Chemical from Babies Linked to Aggression" could work well as a headline. It succinctly captures the core idea of the study, emphasizing the connection between a chemical (HEX) associated with babies and its potential impact on aggression in humans. 

Would you like suggestions for alternate headlines, or is there something specific you'd like to adjust in this one?

Radbound University behavioral scientist Jasper de Groot, who was not involved in the research, told *New Scientist* that one limitation of the study was its failure to measure physiological responses to the HEX odor. Similarly, University of Oxford biologist Tristram Wyatt, an expert on the evolution of pheromones, expressed skepticism in *Science*, calling the authors' explanations for HEX’s effects on human behavior speculative. He pointed out that psychological experiments are notoriously hard to replicate and noted the lack of evidence showing that humans emit enough HEX to trigger an olfactory response. Wyatt emphasized the need for a more rigorous approach, stating, "It’s fascinating research, but I’m not sure how much weight to put on it."

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