Weight isn't only calories in vs calories out — hormones set how hungry you feel, how much you move spontaneously, and where fat gets stored.
Insulin: opens fat cells for storage; chronically high with visceral fat.
Leptin: satiety signal from fat cells; drops during weight loss, causing hunger.
Ghrelin: hunger signal from the stomach; rises before meals and during sleep loss.
Cortisol: stress hormone; chronically high drives belly fat.
Thyroid (T3/T4): sets metabolic rate; low thyroid slows the whole system.
Sleep, strength training, protein, and waist size positively affect all five.
Start with the marker that reflects all five.
WHtR Calculator →
BMI can label muscular athletes as overweight or obese. Here's when BMI misses the mark and what to use instead.
The clearest waist guideline for women, based on the NHS and Ashwell Waist-to-Height ratio — no charts, just one rule.
How age changes your healthy weight range, and the simple WHO/CDC formula that answers "how much should I weigh?".