Could a Simple Dietary Supplement Ease Autism Social Challenges?

A new study from Academia Sinica suggests that a simple dietary supplement could help improve social behaviours in autism spectrum disorder (ASD). Researchers tested a low-dose mixture of zinc, serine, and branch-chain amino acids (BCAAs) on mice with ASD-like traits. The results showed noticeable improvements in brain function and behaviour across three different mouse models. ASD is known for causing difficulties in social interaction, communication, and repetitive behaviours. These challenges stem from abnormal neural development, where connections between neurons form differently due to genetic and environmental influences. Nutrition is one such environmental factor, leading scientists to explore dietary interventions as potential treatments.

The research team hypothesised that combining zinc, serine, and BCAAs might work better together than individually. They also believed lower doses of each could still be effective. After testing the cocktail, they found it reduced hyperactive neurons in the amygdala—a brain region linked to social behaviour. This change helped the mice behave more like typical animals.

Further analysis revealed that the supplement altered protein expression in the synapses, making them resemble those of healthy mice. The same positive effects appeared in two other ASD mouse models, Nf1 and Cttnbp2. The study concluded that the nutrient mixture improved synaptic function and social interactions across all three models. The findings suggest that a multi-nutrient supplement could offer a safer, long-term approach for managing ASD-related deficiencies. Unlike single-nutrient treatments, this cocktail worked at low doses and showed broad effectiveness in different ASD models. The team now sees dietary supplementation as a practical strategy for future research and potential therapies.