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Last updated: February 5, 2026
Have you ever looked at your plate and thought, How am I eating this little and still not losing weight?
Or maybe you are working out consistently, trying to be “good,” doing all the right things… and your body just will not cooperate.
That kind of frustration can mess with your head. It makes you question yourself. It makes you wonder if something is wrong with you.
A lot of the time, it comes down to stress. More specifically, how your stress hormones are responding behind the scenes.
In this post, I’m breaking down how stress and cortisol affect blood sugar, metabolism, and fat storage, and why eating less and exercising more can actually make fat loss harder when your body is under constant stress.
? Before we get started:
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When Eating Less Stops Working
Most of us were taught the same rule. Eat less. Move more. Lose weight.
And yes, that can work for a while. But what happens when someone is already eating very little? Think 1,200 calories a day. Or less. Do we just keep cutting food?
At some point, the body does not see this as weight loss anymore. It sees it as danger.
When calories stay too low for too long, your body shifts into survival mode. And survival mode changes how your hormones behave.
This is where stress hormones come into play.
How Stress Raises Blood Sugar (Even If You Are Not Eating Carbs)
This part surprises a lot of people.
You can have high blood sugar even if you are not eating sugar or carbs. Even if you are fasting.
Here is how that happens.
When your body feels stressed, it releases stress hormones from the adrenal glands. One of the main ones is cortisol.
Cortisol’s job is to keep you alive. When stress shows up, your body assumes you need quick energy. So it releases sugar into your bloodstream.
That sugar can come from stored sugar in the liver, stored sugar in muscle, or sugar your body makes on its own.
You do not have to eat carbs for this to happen.
The problem is that most of our stress is not physical. We are not running from danger. We are sitting in traffic. Rushing to meetings. Trying to get kids out the door. Mentally on all the time.
So now you have sugar in your bloodstream that your body is not actually using.
Related:
How to Lower Blood Sugar Naturally (Without Eating Less)
Cortisol Also Slows Insulin
Here is another important piece.
Cortisol does not just raise blood sugar. It also slows insulin.
Normally, insulin helps move sugar out of the blood and into your cells for energy. Cortisol temporarily blocks that process so sugar stays available in the bloodstream.
When blood sugar stays high, your body has to store the extra somewhere. Very often, that storage becomes body fat.
This is one reason people can gain weight even when they are eating very little.
Why Stress Makes Fat Loss Harder
When stress and blood sugar stay high, your body does not want to burn fat.
It thinks you are in survival mode.
So to protect you, it slows your metabolism. You burn fewer calories at rest. What used to be a calorie deficit might no longer be one.
That means:
- Fat loss slows down
- Plateaus show up
- Eating slightly more causes weight gain
This is your body adapting.
Why Belly Fat Is So Common With Stress
You might notice your arms and legs stay fairly lean, but your belly feels softer. Or you feel “skinny fat.”
High cortisol encourages the body to store fat around the middle, especially visceral fat. This is the fat around the organs.
It gets even trickier because belly fat cells respond strongly to cortisol. So more stress can lead to more belly fat, which then reacts even more to stress.
This is also why over-exercising can backfire for some people. Pushing harder can raise cortisol even more.
Why Low-Carb Diets Can Help… Then Stop Helping
Lower-carb diets often work at first because they lower blood sugar.
But if stress stays high, cortisol stays high too.
For some people, staying very low carb for too long can actually increase stress in the body. In those cases, adding back nutrient-dense carbohydrates can help calm things down.
Foods such as sweet potatoes, purple potatoes, Japanese yams, blueberries, raspberries, and kiwi are examples of carbs that provide important nutrients.
Related:
8 Best Foods That Lower Cortisol and Calm Stress
Why Testing Can Be Helpful
Instead of guessing, testing can show what is actually happening.
There are at-home labs that measure cortisol patterns, thyroid function, estrogen balance, testosterone, and DHEA.
For women, testing is often done later in the cycle or when symptoms feel strongest. For men, it is usually done during periods of worse symptoms.
In this case, I highly recommend starting with either the Minerals & Metals Test or the Stress, Mood, and Metabolism Test.
One Simple Thing You Can Do to Lower Stress
When you are stressed, you usually breathe faster and more shallow. You tend to breathe in longer than you breathe out. That keeps your body in fight-or-flight mode.
To calm your nervous system:
- Breathe in through your nose
- Breathe out equal to or longer than your inhale
- Do not hold your breath
For example:
- Inhale for 3 to 5 seconds
- Exhale for 5 to 7 seconds
Do this for one minute. Five or six slow breaths.
Related:
7 Simple Activities That Naturally Lower Cortisol and Improve Mood
Supportive Nutrients for Stress and Recovery
In functional medicine practice, nutrients often used to support stress include:
- Magnesium to help relax the nervous system
- Adaptogens like ashwagandha
- L-theanine for calming support
These are commonly used to help lower stress and support deeper sleep, which plays a role in fat burning overnight when blood sugar is balanced.
Quick Recap
✅ Stress alone can raise blood sugar
✅ Cortisol blocks fat burning
✅ Chronic stress lowers metabolism
✅ Belly fat is closely tied to cortisol
✅ More restriction is not always the solution
Final Thoughts
If fat loss has felt harder than it should, I hope this helped you see your body in a new way. Sometimes the missing piece is not more discipline, but more support.
When stress stays high for too long, your body shifts into protection mode, and fat loss naturally takes a back seat. Your body is not working against you. It is responding to what it thinks it needs to survive.
So instead of asking, What do I need to cut or control next? try asking this: Where could I give my body a little more support instead of more pressure? Let me know in the comments below.
? Still dealing with bloating, fatigue, or gut issues, no matter what you try?
If you’ve been chasing symptoms and nothing seems to stick, it’s time to look deeper. I’d love to help you uncover the root cause of your digestive issues so you can finally get the answers you’ve been looking for.
? To get started, learn how private coaching and functional lab testing can help support your gut-healing journey.
Additional Resources
- 8 Best Foods That Lower Cortisol and Calm Stress
- 7 Simple Activities That Naturally Lower Cortisol and Improve Mood
- 10 Hidden Signs of High Cortisol (And How to Fix It)
- 8 Hidden Symptoms of Adrenal Fatigue Most People Miss
- How to Naturally Lower Cortisol in the Body (& Feel Calm Again)
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