People who experience social isolation have the same levels of diabetes, body weight, physical activity, and calculated heart disease risk as those who are socially connected, suggesting that social...

We analyzed the available evidence and found that social isolation does not appear to be linked to differences in diabetes, body weight, physical activity, or calculated heart disease risk as measured by the Framingham risk score. The single assertion we reviewed suggests that people who are socially isolated have similar levels of these health markers as those who are socially connected [1]. This means that if social isolation is tied to higher rates of death from heart disease, it may be through other pathways — not by changing these common risk factors like blood sugar, weight, or activity levels. What we’ve found so far leans toward the idea that social isolation affects health in ways that are separate from the usual biological measures used to assess diabetes or heart disease risk. We did not find any evidence contradicting this. The evidence we’ve reviewed is limited to one assertion, and while it is supported by 58.0 studies or claims, we cannot say how these numbers were counted or whether they represent direct measurements or indirect associations. More research would be needed to understand the exact mechanisms involved. For now, if you’re concerned about heart health and feel socially isolated, it may help to focus not just on diet and exercise, but also on building meaningful connections — even if those connections don’t immediately show up in your blood tests or BMI.