Why Weight?

Ages 12–17

Teens' corner

Straight answers, no diets, no weigh-ins, no shame. Growing bodies play by different rules to adult ones, and most of the advice online was never written for you.

Bloom the owl, the friendly guide of Why Weight?

Your body is under construction, and construction sites look messy in the middle. That's not a fault — it's the job going well.

Why did my body change so fast?

Puberty adds height, muscle, bone and fat in bursts — and rarely in a tidy order. Lots of people gain weight first and grow into it months later. Hips, chest, shoulders and feet often turn up early and out of proportion. It's the build phase, not the final shape.

Should I diet?

A growing body needs a steady supply of fuel to build bone and brain. Restricting food during those years is linked to slower growth, weaker bones, more anxiety around food, and — surprisingly — higher weight later. If something about food or your body worries you, the move is a conversation, not a diet.

Everyone online looks different to me.

You're comparing your live, unedited body to filtered, posed, lit and often paid-for images. Feeds are built to make you feel like an outlier so you keep watching. Muting accounts that make you feel worse is a legitimate health decision.

My friends talk about calories all the time.

Diet talk spreads fast in friend groups and mostly makes everyone feel worse. You're allowed to say "I don't really do food talk" and change the subject. You don't owe anyone an explanation of what's on your plate.

What actually helps at this age?

Regular meals plus snacks, enough sleep, water, movement you genuinely like, and time off screens. That's the real list. Nobody your age needs a weigh-in, a calorie app, or a 'transformation'.

Sports, dance or gymnastics coaches keep mentioning weight.

Under-fuelling in sport is a genuine risk — it can stall periods, weaken bones and cause injuries. If a coach is talking about your weight, that's a conversation to bring to a parent, doctor or another trusted adult, not something to solve alone.

When to tell an adult

None of these mean anything is wrong with you. They mean it's time to have someone in your corner — a parent, school nurse, GP or counsellor.

  • Skipping meals, or eating in secret
  • Feeling panicky, guilty or 'bad' after eating
  • Exercising to make up for food
  • Weighing or body-checking many times a day
  • Periods stopping, feeling cold, faint or exhausted a lot
  • Thoughts about food and your body crowding out everything else

Eating difficulties are common, treatable, and much easier to treat early. You do not have to be very unwell to deserve help.

This corner is general education, not medical advice, and it can't replace a doctor who knows you. If you're in crisis, contact your local emergency number or a helpline in your country right away.