How do you know how much grey hair all your ancestors had at any age?
None of my grand-parents or any other 'old' person from their villages got their first greys till their mid to late 50s. When you take a look at old photos, also no one younger than 50 had a single gray.
People (ESPECIALLY women) are getting old and whitering at alarming pace. Young girls are starting to mature (at 15-16) and already when they hit 24-25 they look like average 30something used to look mere 20-30 years ago.
Time is passing by like ferarri, girls dangerously young are looking 'ready' and girls my age are already hitting the wall, hitting it hard. God, can you reset time speed to x1.00?