Researchers Say Kissing Can Transmit Depression and Anxiety

However, the researchers behind the Iranian study were careful to note the limitations of their work. They did not account for all potential confounding factors, such as diet, genetic predisposition, or pre-existing medical conditions, all of which can influence both microbiota and mental health. Moreover, the study only tracked couples for six months—a relatively short time frame in the context of lifelong relationships. Despite these limitations, the findings raise important questions about the hidden pathways through which our mental states are influenced by those closest to us.