Revealed: How a can of DIET Coke makes your body store fat, rots teeth and affects you in the same way as cocaine within ONE HOUR. A UK pharmacist has shocked fizzy drink fans by releasing a step-by-step guide to the dramatic way a can of Diet Coke affects the body from 10 minutes after the first sip until an hour later.
For girls. puberty can start anywhere between the ages of 8-13 years (and sometimes earlier or later) but often the first changes happen around 10 or 11 years. For boys. the first changes often happen a bit later than they do for girls, somewhere between 10 and 15 years.
Puberty doesn't happen all at once â it happens in stages. Guys usually start puberty later than girls, when they're around 10 to 12 years old. Some start sooner and others later. You may continue to go through puberty changes until you're 20 years old. A guy may show some signs of puberty at an early age (like a voice that's starting to crack) but may not show other signs of puberty until years later (like growing facial hair).