A client asked me recently why I kept bringing up her blood sugar. She wasn't diabetic. It hadn't crossed her mind that it was relevant to her.

It's one of the most common questions I get, and the honest answer is that it depends on the person. When I run an intake, I'm not looking for one culprit. I'm looking for a loop: a handful of systems feeding each other, each one making the next one worse. Blood sugar regulation is rarely the whole story, but it can be a link in the chain, and in perimenopause and menopause, it's a link that gets a lot harder to ignore.

Your body used to have more room for error

Steady blood sugar means steady energy and a brain that isn't hijacked by hunger. Spike and crash, and you know the feeling: the afternoon wall hits, and you're reaching for coffee or something sweet just to function through the next meeting.

Here's what's different now: estrogen, specifically estradiol, plays a real role in keeping your cells sensitive to insulin. That's part of why insulin resistance, where your cells stop responding well to insulin and your blood sugar runs higher as a result, becomes especially common once you're through menopause. The hormone that used to help buffer you against blood sugar swings has dropped to a lower baseline for good. But the shift starts well before that. In early perimenopause, estradiol doesn't decline in a straight line. It swings, some months higher than your reproductive years, some months lower, and your insulin sensitivity takes the hit right along with it. Every one of those swings changes how easily your glucose rises after a meal.

So the habits that worked fine in your thirties, the skipped breakfast, the coffee-only morning, the granola bar at 3pm, don't land the same way anymore. You have less buffer than you used to, and your body notices the difference before you do.

Every spike reads as an emergency

A blood sugar spike and crash isn't just a food issue. Your body treats it as a threat. When glucose drops too fast, adrenal hormones get released to pull you back up, the same stress response your body would use for any perceived danger. Do that several times a day, and your stress system never actually gets to rest.

That's a bigger deal right now because your adrenal glands already have a second job. As your ovaries produce less estrogen and progesterone, your adrenals step in to contribute smaller amounts of estrogen and androgens (hormones like testosterone) to help make up the difference. If those glands are also busy firing off cortisol every time your blood sugar crashes, there's less capacity left for that backup hormone production. The two systems are pulling on the same resource.

This is also why the 3am wake-ups are so often tangled up with blood sugar. A drop in glucose overnight, especially after a high-carb dinner or dessert, can trigger the same adrenaline release, right at the moment your declining progesterone and fluctuating estrogen are already making deep, restorative sleep harder to come by.

It's not just what you eat, it's what you eat it with

It's not only about cutting sugar. It's about combination. What you eat with carbohydrates changes how your body responds to it, sometimes dramatically. Two people can eat the same slice of bread and have two completely different blood sugar responses, depending on what else is on the plate and what their body is already dealing with hormonally.

A sugary drink or juice on its own, with nothing to slow it down, tends to produce one of the sharpest spikes you can have, and the crash that follows is exactly the kind of swing your adrenal glands are least equipped to buffer right now.

The weight piece isn't just about willpower

Every glucose spike means an insulin spike, and one of insulin's jobs is storing that extra glucose as fat, often right at the midsection. There's an additional layer at play here too. Insulin resistance also impairs how well your liver metabolizes and clears estrogen, and it can throw off your gut microbiome in ways that affect estrogen metabolism too. So you're not just storing more fat, you're also compromising the system that's supposed to clear out excess estrogen and keep your levels balanced. Insulin resistance and estrogen aren't separate problems. They're feeding each other.

Blood sugar regulation isn't always the root, but it's often a contributor

Because everyone I work with is different, blood sugar regulation isn't always the primary driver of what's going on. Sometimes it's one piece of a much larger picture involving digestion, sleep, or stress. But for a lot of the women I work with, it turns out to be the piece that gets everything else moving again, including a weight loss goal that had stopped budging.

So when a client asks why we are focusing on blood sugar regulation, this is what's behind the recommendations I've given her. It's not only a diabetes issue. It's a hormone issue, a sleep issue, a stress issue, and often a weight issue too, and it's all connected to the same system.