Nature, nurture and the things being remembered

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What Staying Up Late Does to Your Health 
If you're a night owl, you may be asking yourself if staying up late is bad for 
you. It's not necessarily bad to go to bed late if you're sleeping in late and 
getting your recommended amount of sleep each night.
People who stay up late tend to have larger social networks than those who 
turn in early. However, they may also be at greater risk for depression, 
diabetes, high blood pressure, and other negative health effects. Here's 
why getting to bed in the wee hours may
—or may not—be bad for your 
health.
What Is a Chronotype?
Having a tendency to stay up late may be part of your genetic makeup, or 
your chronotype. You can think of your chronotype as your internal sleep
—
wake clock, and everyone's is different.
Your chronotype determines the time of day when you feel most active.
If you like to stay up late, you have what is called a late chronotype. Late 
chronotypes are at their most productive in the late evening or at night. If 
getting up early is your cup of tea, you have an early chronotype and feel 
most active during early parts of the day. Intermediate chronotypes fall 
somewhere in between late and early. 

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How Staying Up Late Affects You
Staying up late can have a number of effects on the health of not only grown 
adults, but also young adults.
1. Challenges for Teenagers
It's not uncommon for teenagers to have trouble falling asleep before 11 
p.m. With their tight schedules, they're also very unlikely to get their full 
recommended 9 hours of sleep in.
School responsibilities and social distractions are two big reasons, but 
hormonal changes around puberty can also have a lot to do with teens' 
shifted sleep schedule.
A February 2021 study published in the Journal of Youth and Adolescence 
investigated the sleep-wake timings for 349 adolescents. The researchers 
found that teenagers who stay up late
—males in particular—engaged in 
more risky behaviors and substance use than teens who didn't stay up at 
night.
If you have a teenager at home, encourage good sleep habits. You can also 
contact your local school officials about later start times, which can help 
ensure teens get more of that necessary shut-eye.