Several research studies have shown a strong correlation between social interaction and health and well-being among older adults and have suggested that social isolation may have significant adverse effects for older adults. For example, study results indicate that:

Social relationships are consistently associated with biomarkers of health.
Positive indicators of social well-being may be associated with lower levels of interleukin-6 in otherwise healthy people. Interleukin-6 is an inflammatory factor implicated in age-related disorders such as Alzheimer’s disease, osteoporosis, rheumatoid arthritis, cardiovascular disease, and some forms of cancer.
Some grandparents feel that caring for their grandchildren makes them healthier and more active. They experience a strong emotional bond and often lead a more active lifestyle, eat healthier meals, and may even reduce or stop smoking.