“Why Am I Always Tired?” Part 1: Blood Sugar and Cortisol
If you’ve been exhausted no matter how much sleep you get, this one’s for you.
Most women I work with who struggle with low energy have been told the same things. Sleep more, stress less, try iron. Yet they are still left wondering “why am I always tired?” And while those things matter, they often miss what’s actually driving the tiredness in the first place.
So let’s start with the two most common culprits I see. Blood sugar and cortisol. And spoiler, they’re more connected than you might think.
Your blood sugar might be on a rollercoaster you don’t know you’re riding
This surprises a lot of women because blood sugar feels like a diabetes conversation. But blood sugar instability affects women across the board, especially those who eat well, exercise regularly and would never consider themselves at risk.
When you go too long without eating, skip breakfast or simply don’t eat enough overall, blood sugar drops. Your body releases cortisol to compensate. And depending on where you are in that cycle you end up feeling wired, foggy, anxious or suddenly completely wiped out.
Do this repeatedly throughout the day, which most busy women do without realizing it, and you end up in a pattern of energy spikes and crashes that no amount of sleep fixes.
The shift here is often simpler than people expect. Eating regularly, including enough carbohydrates to actually fuel your body, and pairing meals with protein and fat to slow the glucose response can change energy levels noticeably within days.
Your cortisol rhythm might be off
Cortisol is supposed to be highest in the morning to help you wake up feeling alert, then gradually decline throughout the day so you can wind down and sleep.
When you’re under chronic stress, under-eating or running on adrenaline most of the time, that rhythm gets disrupted. Cortisol can be low in the morning when you need it most, which is why you wake up exhausted after a full night of sleep, and higher in the evening when it should be tapering off, which is why you get that second wind at 9pm and then can’t sleep properly.
This dysregulated pattern is one of the most common drivers of the kind of tiredness that feels bone deep. The kind that a nap doesn’t touch and caffeine only temporarily masks.
Supporting your cortisol rhythm isn’t about including the latest and greatest adaptogen. It’s about eating enough, managing your stress load and protecting your sleep consistently enough that your nervous system actually gets to downregulate.
The connection between the two
Here’s the part worth sitting with. Blood sugar and cortisol are in a constant feedback loop.
Low blood sugar triggers cortisol. Elevated cortisol dysregulates blood sugar. And around and around it goes, leaving you tired, wired, foggy and frustrated no matter how hard you try to take care of yourself.
Breaking that loop starts with the foundations. Eating enough. Eating regularly. Getting enough carbohydrates to match your activity level and support your hormones. Not flashy but surprisingly effective.
Ready to get to the bottom of your fatigue?
If you’ve been tired for a long time and nothing has stuck, my 1:1 nutritional therapy program looks at the full picture together. Your blood sugar, your stress response, your gut health, your hormones. All of it specific to you.
3 months of tailored support or 4 months with functional lab testing included. Link below to find out more.
