Scientists have discovered that feelings of loneliness can significantly impact memory performance in older adults, according to a new study. The research, published in Aging & Mental Health, found that those feeling more lonely initially scored lower on memory tests but the rate at which their memories declined over six years was similar to those who did not feel lonely.

Despite this, loneliness is seen as a crucial factor influencing cognitive performance early in old age. The study also highlighted that physical activity can improve initial memory scores, acting almost like a “cognitive buffer”. However, while it doesn’t accelerate decline, it does elevate the baseline level of mental function.

The findings come at a time when one in six people worldwide will be over 65 by 2050. This demographic shift poses significant challenges for healthcare systems and highlights the importance of addressing loneliness as a key factor in cognitive health.

Previous research has suggested that social isolation can lead to less social interaction, increasing the risk of depression – both of which directly affect memory tests. Additionally, lonely individuals often face more health issues such as hypertension or diabetes, further impacting cognitive function.