Yes—in data from 58,712 people, BMI (Body Mass Index) was less useful for spotting heart and blood sugar risks at older ages. The study examined U.S. health survey data collected from 1999 to 2020. People in the study were 12–85 years old. Researchers compared BMI (Body Mass Index) with waist size divided by height. They checked how well each measure identified people with high blood pressure, unhealthy blood fats, or diabetes. Both measures became less useful at telling who had these conditions with age. Their links to these health risks also weakened in older groups. The pattern was not a simple straight line. Among older adults, risk appeared to level off at higher body-size values. That does not show that a larger body size protects health. The usual cutoffs for obesity also worked differently across age groups. Researchers explored new cutoffs based on age and sex. Those need testing in studies that follow people over time. This study compared people at one point, rather than tracking how their health changed. The summary did not give an exact percentage for the drop in usefulness. For BioSocial members, the takeaway is about context, not ignoring a number. Tracking your body-size measure alongside your bloodwork can help frame community conversations. Comparing notes with people near your age may be more useful than comparing labels alone. A single cutoff may not tell the same story at every age. How has the relationship between your body-size numbers and bloodwork changed as you’ve gotten older?