Blood tests suggest that social disadvantage can accelerate aging and increase disease risk

A new study led by researchers from University College London (UCL) has found that individuals with higher socioeconomic status, such as those with higher incomes or education levels, exhibit a reduced risk of age-related diseases and show fewer signs of biological aging compared to their peers of the same age. The study, published in Nature Medicine, highlights the impact of social inequalities on the biological aging process.

The research, led by Professor Mika Kivimaki from UCL, analyzed data from four large longitudinal studies with over 800,000 participants, including the Whitehall II study in the UK, the UK Biobank, the Finnish Public Sector Study (FPS), and the Atherosclerosis in Communities (ARIC) study in the US. The study looked at various social advantage indicators, such as education, father’s socioeconomic position, neighborhood deprivation, occupational status, and household income, to measure their impact on aging.

The findings revealed that individuals with more social advantages had lower levels of proteins in their blood associated with the aging process, including proteins linked to inflammation and the immune system. These proteins play a crucial role in regulating inflammatory and cellular stress responses, influencing the aging process.

According to Professor Kivimaki, the study provides strong biological evidence that social conditions can influence the pace of aging. The research suggests that healthy aging is achievable for society as a whole, as individuals with favorable socioeconomic conditions already exhibit slower aging processes.

The study also found that changes in social standing can have a measurable impact on biological aging. Individuals who improved their social advantage later in life showed more favorable protein concentrations compared to those whose circumstances did not change. This highlights the importance of addressing social disparities to promote healthy aging.

While the study does not provide a definitive explanation for how social factors influence biological aging, previous research has suggested that factors such as stress, mental health, environmental exposures, and lifestyle behaviors could play a role. The researchers emphasize the need for further studies to elucidate the mechanisms underlying the link between social advantage and aging.

In conclusion, the study underscores the significant impact of socioeconomic status on the aging process and highlights the importance of addressing social inequalities to promote healthy aging. By understanding the biological markers of aging, researchers hope to develop targeted interventions to improve health outcomes for individuals at risk of accelerated aging.

For more information, the study titled “Social disadvantage accelerates aging” can be found in Nature Medicine.