So I'm at dinner with a friend last week. She's mid-40s, runs her own business, two kids in school. We're catching up and at some point she goes
"I don't get it. I'm exhausted by like 3pm. But then 10 o'clock hits and I'm wide awake and my brain is just… going."
I hear this exact thing constantly. And I always tell people the same thing: that's not just stress.
That's your cortisol curve being completely upside down.
She looked at me like I said something in another language. So I grabbed a napkin and drew it out.
Here's the deal with cortisol. It's not a bad guy. It's actually the hormone that gets you out of bed in the morning. It's supposed to be high when you wake up and then slowly drop throughout the day, lowest point around 10pm, so you actually feel sleepy at bedtime.
That's the design. That's how it's supposed to work.
But here's what happens to pretty much everyone living a normal busy life: cortisol is low in the morning (you need three coffees to feel human), and then it spikes at night when it's supposed to be gone.
So you're exhausted but you can't switch off. Tired but wired. It's not a personality quirk, it's just your hormones running the wrong program.
"The problem isn't that you have cortisol. The problem is that it's showing up at the wrong time, like a guest who sleeps through the party and then wants to talk at midnight."
The reason it flips is pretty simple.
Cortisol was designed for short bursts, like, real danger, you handle it, it goes away. But your nervous system genuinely cannot tell the difference between a lion chasing you and a Slack notification at 6pm.
Both trigger the same response. So if you're in low-grade stress all day commuting, working, worrying, scrolling, your body is just quietly pumping out cortisol the whole time.
And by evening when it should be winding down, it's still going.
So what do you actually do about it? I gave my friend five things that night. None of them are crazy. None of them cost money. They just work with the rhythm your body already has instead of fighting it.
Get outside first thing in the morning — like, actually outside.Ten minutes of natural light within the first 30 minutes of waking tells your brain "it's morning, let's go" and triggers your cortisol to peak at the right time. This one thing alone resets a lot. Don't look at your phone first. Go outside first.
Cut caffeine after noon — yes, noon.I know. But caffeine blocks the signal that makes you feel sleepy and it keeps cortisol elevated for hours after you drink it. That 3pm coffee to get through the afternoon? It's part of why you can't sleep at midnight. Give it two weeks and you'll feel the difference.
Give yourself a real stop time in the evening.Doesn't have to be long, even 30 minutes with no emails, no decisions, no work talk. Your nervous system needs a signal that the day is over. Without that signal, cortisol just keeps going.
If you work out hard, do it in the morning.Exercise spikes cortisol, that's actually good and healthy. But an intense evening workout pushes that spike to exactly when you need cortisol dropping. Morning workouts, even just 3 days a week, make a real difference in how easily you fall asleep.
No scrolling in the last 30 minutes before bed.And it's not really about the blue light, that's kind of overblown. It's that Instagram and the news are specifically designed to make you feel something. Outrage, FOMO, anxiety, excitement, all of those are cortisol triggers. Your brain doesn't care that you're lying down. It reacts anyway.
💡 One more thing worth knowing: if you've tried all of this and you still feel wrecked in the morning or wired at night, it's worth actually testing your cortisol.
There's a simple saliva test you do at home, four samples throughout the day, and it maps your exact curve. It takes the guesswork out completely and tells us exactly what we're working with.
My friend texted me after that dinner. She said she'd been doing the morning sunlight thing and cut her afternoon coffee and she slept through the night for the first time in she couldn't even remember how long.
Not a medication. Not a supplement.
Just her body doing what it already knew how to do , once we got out of the way.
That's usually how it goes.
That's A Wrap
Thanks for spending a few minutes with me today.
My goal is to help you cut through the healthcare noise and become more proactive on your health journey.
You are so much more powerful than you think.
Have the best week.
🌴 Kevin Andreosky 🌴