In middle-aged adults, having more fat around the internal organs is linked to a faster rate of cardiovascular aging, with each additional liter of this fat corresponding to an extra 0.656 years of biological aging in the heart and blood vessels, even after accounting for overall body weight and chronological age.

The amount of fat stored around internal organs and within muscles and the liver is more strongly linked to signs of aging in the heart and blood vessels than overall body weight measured by BMI.

As people get older, they tend to have more fat around their organs and less under the skin, making weight and waist measurements less reliable for detecting health risks in seniors.

Higher amounts of fat in the liver are linked to older biological cardiovascular age compared to fat stored around the abdomen, with each 1% increase in liver fat corresponding to about 1.066 additional years of cardiovascular aging.

In men, having more fat around the upper body is linked to an older biological age of the heart and blood vessels, with each extra kilogram of this fat type adding nearly a year to cardiovascular age. This link is not seen in women.

Older adults who are more physically fit tend to have less body fat, especially fat around the organs, even if their weight looks normal.