PCOS Decoded

The crash after lunch and the 9pm cravings are one problem

· 6 min read

You ate dinner. You weren't hungry. You went back to the kitchen anyway, and you couldn't explain it to yourself.


Nine-forty at the freezer door

You've already brushed your teeth. That was supposed to be the end of eating for the day. Forty minutes later, you're standing in front of the open freezer with a spoon in your hand.

Dinner was fine. You ate a proper meal, and you weren't even hungry in the usual way. Your stomach wasn't growling. You just couldn't stop thinking about food. You thought about the ice cream while you loaded the dishwasher, and again during your show. You tried to bargain with yourself: one square of chocolate instead, or a handful of chips. It ended the way it usually does.

Earlier, at three o'clock, there was the bag of chips at your desk that you finished without ever really deciding to.

In the morning you'll go over it again, like you have for years, and decide that other women have something you don't. Discipline, or self-respect, or whatever you're calling it this month.

The research tells a different story. About a third of women with PCOS show signs of disordered eating on screening questionnaires, and their odds of an abnormal eating-disorder score are about three times higher than other women's. Women with PCOS don't have weaker characters. Something in their bodies works differently, and researchers have measured it.

Why "enough" is harder to feel

Your appetite says nothing about who you are. In PCOS, the hormones that control it don't work the way they should.

You aren't ignoring the feeling that tells you to stop eating. In women with PCOS, that feeling really is weaker, and researchers have seen it in blood tests taken after identical meals.

The good news is that this can change. There are treatments that help, and you can ask about them at a normal doctor's appointment.

Two ends of the same curve

It starts with the insulin problem I wrote about in my post on belly weight. Your cells don't respond well to insulin, so your body makes extra, and all that insulin raises your testosterone. It also throws off the hormones that control hunger.

After you eat, three things are supposed to happen. Ghrelin, the hormone that makes you feel hungry, is supposed to drop. Your gut releases a hormone called CCK that tells your brain you've eaten. And leptin, which comes from your fat cells, tells your brain you have plenty of energy stored.

In PCOS, none of these work quite right. Women with PCOS have a smaller drop in ghrelin after eating than women of the same weight without PCOS, so the hungry feeling never fully switches off. Their CCK response is weaker too, and the weaker it is, the higher their testosterone tends to be. Their leptin levels are usually high, but the brain doesn't respond to leptin well, so the message that you're full doesn't get through.

That means three different "you can stop now" messages are all turned down at once.

Then there's the afternoon. You eat lunch with some quick-digesting carbs in it, and your body responds with a flood of insulin. That insulin stays high after the food is gone, so your blood sugar drops lower than it should. In one line of research, about a third of women with PCOS developed reactive hypoglycemia, a blood sugar drop a few hours after eating, after a meal of simple carbs. Among lean women with PCOS, one study found it happened to about half. Their blood sugar went up high an hour after eating and then fell to around 61 mg/dL a few hours later, lower than where it had started.

That drop is the two o'clock slump. You feel weak, shaky and sweaty, your heart races, you want to put your head down on your desk, and you're much hungrier than the lunch you just ate should allow.

Two more findings from the same research explain the rest of the day. The blood sugar drop came with a rise in cortisol and androgens (hormones like testosterone), so it doesn't just feel bad. It makes the hormone problem worse. And after simple carbs, ghrelin started rising again about two hours later, while after protein it stayed down for five hours. I'm not telling you what to eat. That's just how the pattern works.

So the three o'clock chips and the nine-forty freezer trip are connected. By evening, your body has spent all day telling you to eat.

You can push through that for a while, but it costs you, and you can't simply decide to stop feeling it. That's what you've been doing for years, and you've been calling it the bare minimum.

What to ask for

Ask your doctor to measure your blood sugar first. An HbA1c shows your average over the past three months. An oral glucose tolerance test is better, and the 2023 international guideline calls it the first choice for PCOS. Describe the slump and when it happens, two or three hours after you eat. That timing is an important clue, and it often goes unmentioned.

Metformin lowers the sugar your liver releases and helps your body use insulin, which smooths out the spike that leads to the crash. It can take the edge off your appetite a little, though scientists still aren't sure exactly how. Some research points to GDF15, a hormone that affects appetite centers in the brain, and other research suggests that isn't the whole story. Metformin is approved for type 2 diabetes and prescribed off-label for PCOS, which means it's approved for something else but can legally be used for this. That's common and backed by guidelines. It can upset your stomach at first, and the extended-release version is gentler. Ask to have your B12 checked if you take it long term.

GLP-1 medications work directly on appetite. They slow down how fast your stomach empties and act on the part of the brain that controls hunger. In studies, people taking them felt less hungry and thought about food less. Researchers now call those constant thoughts about food food noise, and they've developed questionnaires to measure it. So the thing you've struggled to describe to your doctor has a name.

In PCOS specifically, GLP-1s lead to modest weight loss and better insulin resistance, but they haven't been shown to lower testosterone, and there isn't much research on fertility yet. Side effects include nausea, vomiting and constipation. They can be expensive and hard to get covered, you can lose muscle if you don't eat enough protein and do strength training, and many people regain weight when they stop. They can't be used during pregnancy and need to be stopped well before you try to conceive.

Here's one way to put it to your doctor:

I get a big crash about two hours after I eat, and I have cravings at night that I can't control. I think it might be insulin resistance. Can we check an HbA1c or a glucose tolerance test and talk about metformin or a GLP-1?

Finding someone who checks the curve

Start with your primary care doctor, your OB-GYN or an endocrinologist (a hormone specialist). Tell them when the slump happens, and ask for the blood tests.

Because disordered eating is so common with PCOS, you might be handed a food diary and a calorie target by someone who never checks your blood sugar. If you've been bingeing, you deserve real support, and a stricter diet won't help a body that already has trouble feeling full. A doctor who treats this as a willpower problem is telling you about their own training, not about you.

For care focused on PCOS, Allara Health is an online practice for PCOS and women's hormone and metabolic health. It pairs doctors with registered dietitians and takes many major insurance plans, though it isn't available in every state. Sesame lets you book a specific doctor at a set price with no insurance or referral, which can help if you're uninsured or facing a long wait.

I have no financial relationship with either company. I'm not an affiliate, and I don't get paid if you book. I mention them because telling you to find a doctor who understands PCOS isn't much help without somewhere to start.

There's no cure for PCOS, and I can't promise you a particular result. But the calm you've been trying to force at nine-forty every night is something many women only found once their insulin was treated. You've been doing this the hard way, and nobody told you there was another way. It can get easier once the condition itself is treated.


This is my experience and my reading of the research, not medical advice. Nothing here should replace a conversation with a clinician who knows your history.

Sources

  1. Food Cravings and Obesity in Women with Polycystic Ovary Syndrome: Pathophysiological and Therapeutic Considerations — Stefanaki et al., Nutrients, 2024
  2. Reactive Hypoglycemia: A Trigger for Nutrient-Induced Endocrine and Metabolic Responses in Polycystic Ovary Syndrome — Karakas, Journal of Clinical Medicine, 2023
  3. Increased odds of disordered eating in polycystic ovary syndrome: a systematic review and meta-analysis — Lee et al., Eating and Weight Disorders, 2019
  4. Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of PCOS — Teede et al., Journal of Clinical Endocrinology and Metabolism, 2023
  5. Metformin-induced increases in GDF15 are important for suppressing appetite and promoting weight loss — Coll et al., Nature Metabolism, 2020
  6. Food noise: definition, measurement, and future research directions — Nutrition & Diabetes, 2025

Filed under: insulin-resistance, appetite, blood-sugar, metformin, glp-1

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