Cortisol is having a moment. Here's what it actually does — and which "cortisol hacks" you can safely ignore.

At some point, cortisol got the gluten treatment. It went from being a hormone most people barely thought about to apparently being responsible for your stomach, your sleep, your skin, your anxiety and whatever happened to your jawline last Tuesday.

Search around long enough and you'll find morning routines designed to lower it, foods that supposedly flush it out, workouts that promise not to spike it and supplements built around getting the stuff under control. There are even people diagnosing themselves with "cortisol face" based on TikTok videos.

Which raises a fairly important question: are we actually supposed to have low cortisol?

Not really. And this is where the internet's cortisol story starts getting weird.

Cortisol isn't the bad guy

Your body makes cortisol for a reason. Actually, several. It's a glucocorticoid hormone produced by the adrenal glands as part of the hypothalamic-pituitary-adrenal axis — the HPA axis, if you don't feel like saying all of that. It helps regulate metabolism, influences immune activity, plays a role in blood pressure, and when something stressful happens, it's one of the signals that helps your body respond.

But there's another part of the story that gets left out of most "LOWER YOUR CORTISOL" content: cortisol has a daily rhythm.

Under normal conditions, cortisol isn't supposed to stay perfectly flat all day. Its secretion rises and falls as part of the body's circadian system, with a strong morning signal helping prepare the body for the active part of the day. Researchers describe glucocorticoids as both a major stress signal and a major circadian signal.

So waking up with cortisol in your bloodstream isn't evidence that your morning routine failed. It means you're awake.

The problem is more complicated than "high"

This is where wellness language tends to flatten biology into something much easier to sell. High = bad. Low = good. Take supplement. Problem solved.

Except stress physiology doesn't work particularly well as a traffic light. The stress response is adaptive — you want your body to respond when something demands more from it. Exercise is a stressor. Public speaking can be a stressor. An infection is a physiological stressor. So is suddenly realizing your flight boards in six minutes and you're in the wrong terminal. The body adjusts.

Problems can emerge when the stress system is repeatedly activated, poorly regulated or pushed out of its normal rhythm. Reviews of the HPA axis and circadian system describe the issue less as "cortisol exists" and more as what happens when stress responses become excessive, prolonged or mistimed.

That's a much less exciting headline. YOUR STRESS SYSTEM IS COMPLICATED AND CONTEXT DEPENDENT probably isn't doing 4 million views.

Then there's "cortisol face"

This one deserves its own section because it has escaped containment. Spend enough time on wellness TikTok and you'll eventually encounter before-and-after photos attributed to lowering cortisol. The before photo usually shows a slightly puffier face. The after photo has better lighting, a different angle and approximately 14 additional variables nobody mentions.

Can certain medical conditions involving abnormal cortisol levels affect appearance and body composition? Absolutely. Does having a round face after a salty dinner mean you've discovered an endocrine disorder through your front-facing camera? No.

A face can look different because of:

Sometimes a puffy face is just a puffy face. This is one of the recurring problems with wellness content: a real physiological concept gets stretched until basically everyone watching can diagnose themselves with it.

Coffee has entered the chat

Coffee gets dragged into this conversation constantly, and there's a kernel of truth here too. Caffeine can influence the body's stress response. Controlled research has found that caffeine can increase cortisol secretion under some conditions, although habitual intake changes the response and tolerance complicates the picture.

This somehow mutated online into another rule: never drink coffee immediately after waking because cortisol is already high. You may have even heard that you need to wait exactly 90 minutes. The "exactly" should make you suspicious.

There are perfectly reasonable reasons someone might delay caffeine. Maybe you like having it later. Maybe drinking coffee immediately makes you jittery. Maybe you're trying to use caffeine more deliberately instead of drinking it before both eyes are open. Fine.

But the internet took a fairly complicated interaction between caffeine, sleep pressure and circadian biology and turned it into an alarm-clock setting. There isn't compelling evidence that every healthy person needs to wait exactly 90 minutes after waking before drinking coffee.

Your body does not know you watched a podcast.

So what should we actually do about cortisol?

Probably fewer cortisol hacks. If you're genuinely worried about abnormal cortisol because of persistent or significant symptoms, that's medical territory. Hormones are measurable. Clinicians can investigate them.

For everyone else, the boring stuff still has an annoying habit of mattering:

And maybe stop turning every uncomfortable human feeling into evidence that one hormone has betrayed you.

There are also ingredients being studied for their effects on stress, mood and related pathways. That's an interesting area of research and one we're obviously interested in at Habit46. But supplements live downstream from habits. They don't make an impossible schedule possible. They don't cancel five hours of sleep. And they definitely don't need cortisol to become a villain before they can be useful.

Maybe the goal isn't lower cortisol

Maybe it's a stress response that works properly: one that rises when you need it, falls when you don't, and doesn't spend every waking hour reacting to notifications, deadlines, terrible sleep and your fourth cold brew.

Cortisol isn't ruining your life. Your life might occasionally be ruining your cortisol.

That's a much harder problem to fit into a 12-second Reel.