Can you be overweight but still metabolically healthy?

The question really bundles two things: having good metabolic lab results despite excess weight, and being fit despite it. On the first point the research is fairly consistent. Kramer and colleagues pooled eight studies with just over 61,000 participants and found that people with obesity but no metabolic abnormalities still had a higher risk of cardiovascular events and death than normal-weight people with equally healthy results, but only once follow-up passed ten years (relative risk 1.24). Over shorter periods no difference showed up, which is part of why the picture looked contradictory for so long.

Caleyachetty and colleagues followed 3.5 million adults and saw the same pattern more sharply: metabolically healthy people with obesity had a higher risk of coronary heart disease, stroke and heart failure than normal-weight people with equally good results, with the largest gap for heart failure.

Stefan and colleagues explain why. 'Metabolically healthy obesity' is usually a way-station rather than a stable category. A large share of people move into metabolically unhealthy obesity over time, and the thresholds for what counts as 'healthy' differ so much between studies that the label is slippery. Being fit dampens some of the risk, but does not erase it.

The message is appealing for several reasons. It offers relief: if the labs look fine, nothing has to change, and a normal blood-pressure reading feels like proof that everything is in order, even though risk builds slowly and invisibly. 'Fat but fit' is also memorable and shareable, while 'usually a transitional phase' is not. Media benefit from the clean, comforting version. Parts of the health industry also have an interest in shifting focus from weight to single lab values or one-off fitness tests, because that sells a simpler story. And for many people it is simply easier to hear that the number on the scale doesn't matter.

Treat metabolically healthy excess weight as good news with an asterisk, not a free pass. Good labs today mean you have a better starting point, not that the risk is gone. Keep moving and lifting for your fitness and strength, track your blood pressure, blood sugar and blood lipids over time, and let a small, sustainable shift in weight head in the right direction rather than waiting for the labs to slip.