What the number means, the WHO ranges, and what counts as healthy for adults.

Full height & weight table with underweight, normal, overweight and obese boundaries.

The same table for women, with notes on pregnancy and body composition.

How clinicians subdivide obesity, and why the class — not just the label — changes risk.

BMI and body fat tell different stories — when each measure is more useful.

Fat around the organs drives disease risk independent of your BMI reading.

A simpler metric that predicts cardiometabolic risk better than BMI alone.

The five diagnostic criteria and the insulin-resistance pathway behind them.

Does a healthy BMI shift as you get older? What the research actually says.

Paediatric BMI uses age- and sex-specific percentiles, not adult thresholds.

How menopause changes body composition and why the standard thresholds get less reliable.

Why BMI misleads for muscular people, with real examples from professional sport.

Calorie-deficit mechanics, protein targets, and what the evidence says about sustainable loss.

Where BMI is genuinely useful, where it fails, and what experts recommend instead.

The Devine formula, where it came from, and why it's a reference point, not a target.

One man. 33 lbs to lose. 23 Tuesdays he almost quit. What keeping going actually looks like.