Many women think cortisol problems only come from emotional stress.
But one of the biggest triggers of stress hormones is actually blood sugar instability.
I (Jen) made that mistake for a long time. I did everything I could to “stay calm” but didn’t realize I was sabotaging myself with food. Now that I’m learning more and working hard to heal my nervous system; I’ve realized that this is one of the things I need to work on the most.
Our bodies are designed to keep blood sugar in a safe range at all times. When blood sugar spikes high and then crashes quickly, our bodies experience that drop as a potential emergency. In response, it releases stress hormones — including cortisol and adrenaline — to bring blood sugar back up.
In other words, blood sugar crashes trigger the same stress chemistry as a threat. So much for my [bad] habit of eating candy to feel better.
I’ve learned that this is why unstable blood sugar often shows up alongside symptoms like:
- anxiety or jitteriness
- afternoon exhaustion
- waking at 2–4 AM
- cravings for sugar or caffeine
- irritability between meals (hangry, much? I was.)
- difficulty calming the nervous system
When these spikes and crashes happen multiple times a day, the body stays in a low-level stress response, continually releasing cortisol to stabilize energy.
Over time, this pattern can keep the nervous system activated and make hormone balance much harder.
The good news is that small daily shifts can stabilize blood sugar surprisingly quickly. I’ve seen this happen with my health as I’ve put the following things into practice.
5 Simple Ways to Keep Blood Sugar — and Cortisol — More Stable
1. Eat protein within an hour of waking.
After the overnight fast, your body needs stable fuel. Starting the day with about 20–30 grams of protein within an hour of waking helps prevent the morning blood sugar spike-and-crash cycle that often leads to mid-morning anxiety or energy dips.
When I learned this, my first question was which was more important: my morning lemon water or morning protein. As I dove into the research, I realized that morning protein is much more important for me while I’m working to fix my cortisol.
So now I start with some protein right after waking up and follow it with my lemon water. I may not be getting all the benefits of lemon water being the very first thing in my stomach, but it’s still helping me stay hydrated — so it’s definitely worth including in my morning routine.
2. Stop eating carbohydrates by themselves.
Carbs digest quickly. When they’re eaten alone — like fruit, toast, crackers, or granola bars — they can spike blood sugar rapidly. Pair carbohydrates with protein, fat, or fiber to slow the glucose release.
While wearing a CGM (continuous glucose monitor), I realized that watching my macros at every meal still wasn’t quite enough. My blood sugar does better if I eat the protein in my meal first, and then follow it with the carbohydrates. That simple shift helps my digestion and keeps my blood sugar more stable.
3. Don’t go too long without eating.
Long gaps between meals can cause blood sugar to drop, which triggers cortisol to raise it again. Many people do better eating every 3–4 hours to keep energy steady.
Yep. This is totally me.
My husband has known for years that if I’m unusually cranky, I probably just need food. I just didn’t realize my “hangry” tendencies were cortisol-related.
Now I don’t let myself go more than four hours without eating protein — and I’m much nicer to be around.
4. Take a short walk after meals.
Even a 10-minute walk after eating helps muscles absorb glucose and can dramatically reduce blood sugar spikes.
This doesn’t have to be walking specifically — just do something active after you eat.
Using the vibration plate on low for a few minutes, bouncing on a rebounder, or riding my recumbent bike have become my go-to options, especially in the winter when the weather is cold outside.
5. Reduce liquid sugar.
Sodas, sweetened drinks, energy drinks, and even large fruit smoothies can spike blood sugar faster than almost anything else. Liquid sugar enters the bloodstream extremely quickly.
Sodas aren’t much of a temptation for me — at least not the regular kind — but I do love a Kevita probiotic drink every now and then.
I’ve learned to ease off them and save them for special occasions. Water is my go-to, usually with a mineral packet mixed in. That keeps me hydrated, supports my minerals, and gives my water a little flavor.
The Nervous System Connection
I’ve finally realized the truth – one of the most overlooked pieces of nervous system regulation is simply stable fuel. You don’t have to wear a CGM to know whether you’re balanced or not. You can track your foods on an app, like I do. I try to keep the following balance of macros at every meal:
- Carbohydrates: 35–40%
- Protein: 25–30%
- Healthy Fats: 30–35%
When our blood sugar stays steady, our body doesn’t need to release emergency hormones to correct it. Cortisol can return to its normal rhythm, energy becomes more stable, and the nervous system begins to settle.
Sometimes the path to calmer hormones isn’t complicated. It starts with how we fuel the body throughout the day.
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