Overview
Do you feel emotionally off—swinging between irritability and low mood—or mentally cloudy, like you're not thinking as sharply as usual? If you've ever described yourself as feeling "foggy" or "not like yourself," you're not alone.
Mood swings and brain fog can be hard to describe—but they're real. These symptoms are often linked to hormonal shifts, metabolic imbalances, or nutrient deficiencies—and they're worth investigating.

Why do people experience mood swings or brain fog?
Mood and mental clarity are directly tied to your hormones, brain chemistry, blood sugar, and sleep quality. When one or more of these systems are off, you may feel emotionally unstable, mentally slow, forgetful, or just unlike yourself.
Hormonal imbalances, such as thyroid dysfunction or fluctuations in estrogen and progesterone, can cause emotional ups and downs. Insulin resistance and blood sugar spikes can also lead to energy crashes and mood instability.
Nutrient deficiencies—particularly B12, vitamin D, and magnesium—can impair concentration and emotional balance. Sleep disruptions, chronic stress, and even mild inflammation in the body can amplify brain fog and mood swings, especially when they go unchecked.
When should you talk to a doctor?
It's time to speak with a clinician if:
- You feel consistently foggy, forgetful, or mentally "slowed down"
- You experience mood shifts that feel out of proportion or hard to explain
- You've noticed energy crashes, irritability, or emotional changes around meals
- Your focus and productivity have declined noticeably
- You feel emotionally off despite efforts to manage stress, sleep, or self-care
These symptoms aren't just about stress—they may signal an underlying health issue.
How Meto Can Help
At Meto, we understand that emotional shifts and mental fog are often rooted in physiology—not personality. We start with comprehensive lab testing to explore possible causes like thyroid dysfunction, insulin resistance, vitamin deficiencies, cortisol imbalances, or hormone fluctuations tied to perimenopause, PCOS, or chronic stress.
If testing reveals an issue—such as low thyroid, high cortisol, or nutrient depletion—your matched specialist will create a personalized care plan. This may include hormonal support, medication, supplements, or targeted strategies for stabilizing blood sugar and improving sleep.
Even when labs appear normal, Meto's care team—including licensed nutritionists and health coaches—can help you improve energy, focus, and mood through data-informed lifestyle adjustments.
You can begin with a virtual consultation, giving you fast access to expert care from the comfort of home.