The real reason you can't wind down at night

You're exhausted, you're in bed on time, and your brain is running tomorrow's meeting anyway. That wired-but-tired feeling isn't a willpower problem — it's a nervous system that never got the signal to switch modes.

The cortisol curve you're fighting

Cortisol, your primary stress hormone, is supposed to follow a curve: high in the morning to get you moving, tapering to its lowest point at night. Chronic stress flattens that curve. When evening cortisol stays elevated, your body keeps running its daytime program — alert, vigilant, scanning — right through the hours when melatonin should be taking over. Sleep still happens, but it's shallower and easier to break.

Where magnesium fits in

Magnesium is involved in hundreds of processes in the body, including several that matter at night: it participates in regulating the stress-response system and supports GABA, the neurotransmitter your brain uses to put the brakes on. It's also a nutrient many women don't get enough of from food alone. That's the logic behind the magnesium-and-sleep conversation — a nervous system with what it needs is easier to downshift.

Building an actual off-ramp

Give the curve something to work with: dim lights in the last hour, keep the bedroom cool, park tomorrow's to-do list on paper, and keep your wake time consistent — it anchors the whole rhythm. If sleep problems persist for weeks or you suspect something more, that's a conversation for your provider.

† This article is for general information only and is not medical advice. These statements have not been evaluated by the Food and Drug Administration. Always talk to a qualified healthcare provider about your health.