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Real Life & Sugar

The 3pm Crash: What I Learned from the Glucose Goddess (And What I Actually Did About It)

I love cooking. I always have. So when a doctor told me I had insulin resistance and the weight wasn't shifting, giving up the food I loved was never going to be the answer. I just needed to cook it differently.

Let me back up. I have hypothyroidism — which is supposedly controlled, but moving from Mexico to Barcelona apparently had opinions about that. Over a few years, the weight crept up in a way I couldn't entirely explain. Then three years ago came the diagnosis: insulin resistance. Which sounds alarming, and is somewhat alarming, but mostly just meant that my body had stopped processing sugar efficiently and was storing the excess instead of burning it.

What followed was a lot of label reading, a lot of kitchen experiments, and eventually — this site. I started swapping the sugar in my recipes, the bloating reduced, and the weight started moving. Slowly. But it didn't feel like sacrifice, which was the important part.

And then I found Jessie Inchauspe — the Glucose Goddess — on Instagram. And then I bought The Glucose Goddess Method. And then a lot of things made considerably more sense.

What the book actually taught me

I am not a scientist. I am not going to pretend to be one. What I can tell you is that Jessie explains the mechanics of glucose spikes in a way that is genuinely accessible — the kind of explanation you can actually use in your daily life rather than file away in the "interesting but irrelevant" drawer.

The core idea: when you eat something that causes a big glucose spike — naked carbs on an empty stomach, a sugary drink, a processed snack — your blood sugar shoots up fast. Your pancreas releases insulin to deal with it. The glucose drops. And somewhere around 90 minutes to two hours later, you hit that familiar wall: the energy crash, the brain fog, the desperate need for something sweet to get through the afternoon.

The 3pm slump is not a willpower problem. It is a glucose problem. And it has two solutions.

What happens when you move after eating

Here is the part from Jessie's book that genuinely changed my behaviour. When you move within 90 minutes of finishing a meal, your muscles activate something called GLUT4 transporters — which sounds very technical but basically means your muscle cells absorb excess glucose directly from your bloodstream, without needing insulin to do the work.

Studies suggest that movement after a meal can reduce the post-meal glucose spike by up to 27%. Resistance movements like squats can bring it down by around 30%. For most people that translates to less crashing, fewer cravings, and considerably less brain fog in the afternoon.

Jessie's four favourite movements — which I have now entirely stolen and made my own:

• Calf raises at your desk Feet flat on the floor, heels up and down, repeat. The soleus muscle in your calf is particularly effective at pulling glucose from the bloodstream. Completely undetectable. I have done this in meetings.
• A quick house chore Vacuum the living room. Fold laundry. Tidy the kitchen. Light activity counts. I now unload the dishwasher immediately after dinner like a person who has their life entirely together, which is a sentence I never expected to write.
• A 10-minute walk Outside, or up and down the stairs. Barcelona has excellent stairs. I use them.
• Air squats Ten, twenty, however many you feel like. No equipment, no gym membership, no particular coordination required. Just you and the kitchen floor.

But here's the thing about the plate

Movement after eating helps. It genuinely does. But I found myself thinking: what if the spike was smaller to begin with?

Because if the glucose doesn't shoot up as dramatically in the first place, there's less crash to manage. Less insulin demand. Less of that frantic 3pm reach for something sweet.

This is where the food swaps come in. Reducing the added sugar on the plate — not eliminating carbs, not going keto, not giving up anything you actually love — means the spike is lower, the drop is gentler, and the afternoon is considerably more functional.

The two approaches work together beautifully. Move after eating to use up the glucose that's already there. And swap the sugar in the recipe so there's less glucose to deal with in the first place.

Where to start on the plate

If you're new to swapping, the Swap Guide covers exactly which substitutes work for what — baking, drinks, sauces, everyday cooking. It's the resource I built because I needed it myself.

For the biggest impact on blood sugar, the swaps that made the most difference for me were:

• Replacing refined sugar in baking with monk fruit — a natural, zero-calorie sweetener that doesn't cause the same glucose response. See: No-Sugar-Added Brownies, Sugar-Free Chocolate Chip Cookies
• Replacing shop-bought sauces with homemade — a single tablespoon of teriyaki sauce can contain 8–10g of added sugar. My Low-Sugar Teriyaki Chicken has 0.5g per serving
• Replacing sweetened drinks — which is where the largest hidden sugar loads live. Hidden Sugar in Your Favourite Sauces goes into this in more detail

And if you want to understand more about why different sugars affect your body differently — why an apple doesn't behave like a biscuit even though both contain sugar — The Great Sugar Mix-Up covers exactly that.

The honest version

I didn't do any of this perfectly. I still don't. I have days when I forget to move after lunch and hit the sofa at 3pm with the glazed expression of someone who has made poor nutritional choices. I have evenings when the cooking involves considerably more sugar than planned because it was that kind of day.

But the overall direction has changed. The bloating is better. The weight has moved — slowly, without drama, without sacrifice. And I understand now why the things that used to work stopped working, and what to do about it.

If you haven't read The Glucose Goddess Method by Jessie Inchauspe, I'd genuinely recommend it. She explains the science in a way that's actually useful rather than just impressive. And the movement piece in particular changed my daily habits in a way that felt entirely manageable rather than heroic.

The rest of it — the food swaps, the recipes, the slightly obsessive label reading — that's what The Sugar Swap is for. You're in the right place.