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Hypoglycemia
Shaky, irritable, or foggy between meals often reflects blood sugar swings. We look at insulin, cortisol, meal patterns, and the brain fuel supply underneath them.
What you may be noticing
Two or three hours after eating, you feel shaky, sweaty, anxious, and irritable. Your focus collapses, your heart races, and you need food now. Some people wake at night with a pounding heart. Others feel a crash after a high-carbohydrate breakfast and spend the day chasing snacks.
If you take insulin or medications that lower blood sugar, confusion, fainting, or seizures need emergency care. People with diabetes should follow their physician guidance for treating lows. Recurrent true hypoglycemia in a person without diabetes needs medical evaluation.
Why it is rarely one thing
In many people without diabetes, these symptoms reflect reactive hypoglycemia: a rapid rise in blood sugar after a meal triggers an outsized insulin response, and blood sugar then falls quickly. Often the absolute level is not dangerously low, yet the speed of the drop triggers an adrenaline surge that produces the shaky, anxious feeling.
I see the brain as the master system here. It runs largely on glucose, and when supply swings, the brainstem and limbic system read it as threat and push the body into sympathetic overdrive. Early insulin resistance can cause delayed and exaggerated insulin release. Meals heavy in refined carbohydrates and light in protein, fat, and fiber spike glucose quickly. A dysregulated stress axis blunts the cortisol response that normally steadies blood sugar; cortisol is not the enemy, but its rhythm matters. Alcohol, skipped meals, and intense exercise without fuel make it worse. Not only low sugar, but unstable sugar and a nervous system that feels every swing.
Patterns we look for
- Fasting insulin, HbA1c, and glucose variability.
- Meal composition, timing, and protein intake.
- Cortisol rhythm across the day.
- Thyroid function.
- Alcohol and caffeine intake.
- Adrenaline-driven anxiety, palpitations, and night waking.
- Autonomic balance and heart rate variability.
- Magnesium and chromium status.
- Post-surgical gut changes that speed gastric emptying.
How I evaluate it
The comprehensive functional neurological exam assesses autonomic responses and cognitive processing, which often worsen when fuel supply is unstable.
Functional labs may include fasting glucose and insulin, HbA1c, a salivary or urinary cortisol rhythm, a thyroid panel, and magnesium. I value a continuous glucose monitor worn for a couple of weeks, because it reveals the patterns behind your symptoms that single tests miss. Your physician can evaluate unusual or severe hypoglycemia further.
How we address it
- Rule out medical causes with your physician.
- Make blood sugar stability a foundation before more intensive steps such as detoxification or fasting.
- Build meals around protein, healthy fat, and fiber, with slower carbohydrates.
- Eat regularly at first, then lengthen gaps as stability improves.
- Reduce alcohol, especially on an empty stomach, and limit caffeine.
- Restore insulin sensitivity with daily movement and strength training.
- Calm the autonomic system and support cortisol rhythm with morning light, breathwork, and consistent sleep.
A small protein-rich snack before bed can prevent night waking in people whose blood sugar dips overnight. Many people notice calmer moods and steadier focus within days of changing breakfast alone.
Stability before intensity is a principle I hold across every plan. Steady fuel creates a steadier brain, mood, and day.
Book your Comprehensive Functional Medicine Eval/Neurological Exam today to discover what the contributing root causes are that are underlying your health concerns.