You’ve already been told sleep matters. But just to hammer the point… it really matters.

You’ve heard time and time again, “get 8 hours.” It’s solid advice. It’s important.

But it’s not everything.

Your circadian rhythm is a 24-hour internal timing system that coordinates cortisol, testosterone, insulin sensitivity, growth hormone, and dozens of other biological processes. So… it’s pretty important.

When this is disrupted, a lot of things can fall out of place.

Elevated nighttime cortisol (further enhanced by all that blue light exposure before bed…). Basically, your body signals stress, which signals the liver to create glucose (gluconeogenesis, for you nerds out there). This reduces insulin sensitivity and sets off a chain reaction that looks a lot like chronic stress. Over time, this can drastically increase risk of type 2 diabetes, weight gain, and cardiovascular disease.

Disrupted cortisol-testosterone balance. Yes, sleep restriction can suppress testosterone production. So, to all the dudes bragging about how big and tough they are because they “don’t need sleep” (yeah, I’m talking to you, bankers), less sleep directly makes you weaker.

Your cortisol rhythm is more sensitive to when you wake up rather than when you go to sleep. So, sleeping in to compensate for a late night disrupts your circadian rhythm more than the late night itself. Your body anchors to your wake time. Keeping that consistent should be high on your priority list.

Forevity maps your hormonal baseline through advanced bloodwork so you can see what your sleep quality is actually doing to your biology, not just guess. If that’s a conversation worth having, you know where to find us.

Reply and tell me: Do you have a consistent wake time, or does your schedule vary week to week? What do you think your biggest struggle is with this?