
Every doctor’s appointment I’ve ever had starts the same way: shoes off, step on the scale, wait for the number. Then comes the math, height and weight run through a formula, and out pops a category that somehow gets to speak for my whole body before I’ve said a word.
That “formula” is BMI, and what I didn’t know until I started digging into it is that it was never built for this. It came from a Belgian mathematician, not a doctor, who was trying to describe the “average” person across a population. It was never meant to size up one individual. It only really became a go-to health screening tool in the 1970s, which means we’ve been leaning on a very old idea for a very personal question.

What gets me is everything it can’t see. BMI can’t tell muscle from fat, where weight sits on the body, or how someones heart, blood sugar, or sleep are doing. Someone can land in the “overweight” category with perfect bloodwork while someone in the “normal” range struggles with nobody checking. In 1998, the cutoff for “overweight” was lowered, and millions of Americans were reclassified overnight without a single body changing. I started thinking about BMI as a photo taken from too far away. It’s fine for a crowd, but useless for a face. It gives you the outline but completely skips the person, and then we act like the outline is the whole story.
So why do we keep treating it like a verdict or something thats so final? I think its because a number is easier to read on paper than a person.
And until that changes, a lot of people will keep walking out of appointments feeling measured, but not heard.