Is It Anxiety or Low Blood Sugar? The Anxiety Trigger Most People Miss
As a therapist, one of the first questions I ask clients with anxiety often surprises them:
"When did you last eat?"
It sounds simple, but it's one of the most overlooked pieces of the anxiety puzzle. Many people who come to me feeling anxious, on edge, or panicky in the afternoon are running on coffee, skipping meals, or eating in a way that sends their blood sugar on a rollercoaster. Their body is reacting to fuel, not just to their thoughts.
Here's what's happening and what you can do about it.
Why Does Low Blood Sugar Feel Like Anxiety?
When your blood sugar drops, your body treats it as a stressor. To bring it back up, it releases stress hormones, including adrenaline and cortisol. Those are the same hormones involved in the anxiety response.
That's why low blood sugar can feel almost identical to anxiety:
Shakiness or trembling
A racing or pounding heart
Irritability or feeling "on edge"
Brain fog or trouble concentrating
Sweating, lightheadedness, or a sense of dread
Your body can't always tell the difference between "I'm in danger" and "I need fuel." Your mind then looks for a reason for the alarm, and suddenly that email, deadline, or conversation feels much bigger than it is.
What Causes Blood Sugar Dips?
Some of the most common patterns I see with clients include:
Skipping breakfast or going long stretches without eating
Running on coffee, especially on an empty stomach
Eating mostly quick carbs (pastries, crackers, sugary snacks) without protein, fat, or fiber
Being too busy to eat until you're suddenly starving
Restricting food as part of dieting
Caffeine deserves a special mention. It can mimic anxiety symptoms on its own, and when it replaces a meal, the effect can stack with a blood sugar dip.
How to Tell If It's Anxiety or Blood Sugar
There's no perfect test you can do in the moment, but these questions can help you notice patterns:
When did I last eat, and what was it? If it's been several hours or your last meal was mostly carbs or coffee, blood sugar may be playing a role.
Does the feeling ease after eating? If you feel noticeably calmer 15–30 minutes after a balanced snack, that's a useful clue.
Is there a time-of-day pattern? Mid-morning and mid-afternoon anxiety are common blood sugar windows.
Is there a clear emotional trigger? Anxiety with no obvious cause is worth checking against your eating.
Often, it's both. Blood sugar dips can amplify anxiety that's already there, making stressful moments harder to manage.
Simple Ways to Support Steadier Blood Sugar and Mood
You don't need a strict diet to make a difference. Small, consistent habits often help most:
Eat within a few hours of waking, ideally before or alongside your coffee.
Pair carbs with protein or fat. Think apple slices with nut butter, cheese and crackers, or yogurt with berries.
Don't wait until you're starving. Regular meals and snacks prevent the crash.
Add fiber from vegetables, beans, whole grains, and fruit to slow the rise and fall of blood sugar.
Notice how you feel. Paying attention to your body's signals is one of the core skills we work on in eating psychology.
It Won't Fix Everything, But It's a Great Place to Start
Anxiety is complex. It can be shaped by stress, past experiences, relationships, sleep, hormones, and much more. Steadier eating isn't a cure, but it can lower the baseline your nervous system is working from, which makes everything else easier to address. At the end of the day, your body and your mind want to be on the same page, and giving your body steady fuel helps your mind feel safe enough to settle.
If you notice frequent symptoms like shakiness, sweating, or dizziness, or if you have diabetes or another medical condition, talk with your doctor. They can check for blood sugar issues and rule out other causes.
Frequently Asked Questions
Can low blood sugar cause panic attacks?
Low blood sugar can trigger physical symptoms that feel very similar to panic, such as a racing heart, shakiness, and a sense of dread. For some people, these sensations can set off or intensify a panic response.
Can coffee on an empty stomach cause anxiety?
It can contribute. Caffeine stimulates the stress response, and without food, you may also be more prone to blood sugar dips later in the morning.
What is a good snack for anxiety?
Choose snacks that pair carbohydrates with protein or fat, like apple slices with peanut butter, a handful of nuts with fruit, or hummus with vegetables.
Get Support
I'm a Licensed Independent Marriage and Family Therapist and Certified Eating Psychology Coach, trained in nutritional psychiatry. I help clients understand the connection between food, mood, and anxiety. I offer virtual therapy in Ohio and Florida and eating psychology coaching nationwide.
If you're curious how your eating patterns may be affecting your anxiety, book a free consultation call to see if working together is a good fit.
