The light you're missing
Your body still runs on sunrise and sunset
Here's an odd one to start: looking at a screen, any screen, can raise your blood sugar, independent of what you're eating. Not a typo. Light is not just something we see. It's one of the strongest signals your body reads to know what time it is and what it should be doing.
Your body runs on a 24-hour clock
The circadian rhythm regulates sleep, energy, body temperature and hormones on a daily loop. It's piloted mainly by light, especially natural light, and by the alternation of day and night. Get that signal right. Sleep, digestion, immunity and mood tend to follow.
Signs it's out of sync
Persistent fatigue despite what looks like enough rest.
Insomnia or waking in the middle of the night.
Cravings and snacking that feel out of your control.
Mood swings and brain fog with no clear cause.
Morning light: your real alarm clock
Natural light hitting the retina, without sunglasses or contacts, triggers the morning cortisol rise that sets the whole day's rhythm. This matters even more in perimenopause, when the body's stress-hormone balance is already shifting and needs a clean, early signal rather than a delayed or blurry one.
Modern life tends to do the opposite of what the body expects: indoors under artificial light all day, then screens and LEDs well past sunset. We've built a life that's out of phase with the clock running underneath it.
Not all light counts the same
Window glass filters out most UV and cuts down the intensity of what actually reaches your retina. Sitting near a closed window, even in a bright room, is not the same signal as being outside. The body reads the difference even if your eyes don't notice it. Opening a window or door or stepping onto a balcony for a few minutes does far more for your body clock than the sunniest room behind glass.
A simple daily reset: natural light in your eyes within the first part of the morning, at least 5 minutes, no sunglasses, ideally outside or with the window open. Get outside during the day when you can, even for a break or lunch. Dim the lights and step away from screens as the sun goes down. Keep the bedroom dark at night.
An unlikely lunch trick
Some early research points to something intriguing: exposing skin, even just a shoulder, to natural light during a meal appears to lower the post-meal blood sugar spike. Looking at a screen during that same meal seems to do the reverse. It's not yet settled science, but it's a good reason to eat outside when you can, screen away.
One ritual, kept from Asia
One of the simplest habits I kept from my years living in Asia: watching the sunrise and the sunset, most days, whatever else is going on. It's not only a mood ritual. It's a daily cue that tells the whole body which way is up. It costs nothing.