Three women -- ages 41, 55 and 64 -- share their secrets to better health and longevity

For an increasing number of women over 40, age really is just a number. It may not be possible to stop the passage of time -- but certain healthy habits can help slow down biological age, experts say. "As we age, our abilities to perform certain physical and cognitive tasks decline, while our risks for disease and ultimately death increase," Chris Mirabile, CEO and founder of NOVOS, a longevity supplements company in New York, told Fox News Digital. "Although these changes are correlated with chronological age, biological age is a more accurate predictor, because it looks at individuals and how well – or poorly – they are aging." If a 40-year-old woman has a biological age of 35, it implies that she is biologically in the same place as an average 35-year-old, Mirabile said – which means a significant reduction in risk for disease and death, plus an increased capacity for activities associated with a high quality of life.