Inside: Feeling scattered, foggy, or just not as sharp as you used to be? In this post, you’ll learn exactly how to get rid of brain fog in 4 clear, practical steps — so you can think clearly, feel energized, and get your focus back.
Ever reread the same sentence five times and still not take it in? I can relate. That was me off and on for years. I’d sit down to read, or write, and sometimes I could think clearly and other times my thoughts would move like molasses. It was also not uncommon for me to forget simple things (I had sticky note reminders placed almost everywhere), and I felt like I was moving through life with a heavy cloud over my head.
That cloud I experienced is called brain fog — a frustrating sense of mental fatigue, forgetfulness, and low focus that can sneak up on you. It’s not a medical diagnosis, but it’s a real symptom that something deeper is going on inside your body. So how do you get rid of brain fog?
I learned how to get rid of my brain fog when I finally started getting to the root cause of my health challenges. Once I understood why my brain felt stuck, I could finally do something about it. If you’re wondering how to get rid of brain fog, these are the same four steps I use with my clients (and used myself) to think clearly again.
Step 1: Find Out What Is Really Causing Your Brain Fog
Brain fog isn’t just “in your head.” It’s your body’s way of saying that something deeper needs attention. The most common underlying causes include:
- Nutrient deficiencies: Low vitamin B12, folate, vitamin D, iron, or magnesium [1–3]
- Thyroid or hormone changes — especially in perimenopause
- Blood-sugar swings or insulin resistance
- Chronic inflammation or autoimmune conditions (e.g., celiac disease, Hashimoto’s)
- Gut dysbiosis — imbalanced bacteria can fuel brain inflammation [5]
- Mold exposure, heavy metals, or environmental toxins
- Chronic stress, poor sleep, or certain medications (antihistamines, some antidepressants, blood pressure medication)
Spot your patterns:
- Fog on waking despite 7–9 hours sleep? Check sleep quality, airway issues, and blood sugar.
- Fog after meals? Look at blood sugar balance, gluten sensitivity, or histamine response.
- Fog mid-afternoon? That’s often protein, mineral, or hydration gaps — plus circadian rhythm dips.
- Fog around your cycle? Consider iron, thyroid, and progesterone changes.
If you suspect deeper genetic factors, you might like my post on Genetic Methylation Testing — it explains how genes like MTHFR affect detox, hormones, and energy production (and why methylated B-vitamins helped me so much) [4].
Step 2: How Do You Get Rid of Brain Fog? Test, Don’t Guess
This is where my turning point happened. For years, I tried every brain-boosting supplement under the sun. Nothing stuck — because I hadn’t identified why my brain was foggy in the first place. Once I asked for more comprehensive labs and ran my own functional tests, everything clicked. I could see exactly where I was depleted, and which systems needed support.
Helpful conventional labs:
- Vitamin B12, folate, and vitamin D (low levels are common and affect cognition) [1–3]
- Iron panel: iron, ferritin
- Thyroid panel: TSH, free T4, free T3, and thyroid antibodies
- Homocysteine (can flag methylation issues that relate to B-vitamin status) [3]
- Glucose markers: fasting glucose or HbA1c
- Inflammation: high-sensitivity C-reactive protein (hs-CRP) [6]
- Sleep study: ask your doctor about a sleep apnea test if you snore, wake up tired, or experience morning headaches — undiagnosed sleep apnea is a major cause of brain fog and fatigue.
Functional testing (when you need to go deeper):
- Organic Acids Test (OAT): nutrient status, mitochondrial function, detoxification
- Comprehensive Stool Test: dysbiosis, pathogens, digestion
- Comprehensive Hormone Test: cortisol rhythm and perimenopause patterns
- Hair Tissue Mineral Analysis (HTMA): mineral ratios and heavy metals linked to energy and focus
Testing gives you a map. Instead of guessing, you’ll know whether your brain fog stems from low nutrients, inflammation, hormones, or gut health — and you can target your support accordingly. This is also where my own labs finally explained why methylated B-vitamins, replenishing minerals, addressing sleep apnea (yes, you can be 39, have a healthy weight and blood pressure, and still have it) and gut repair were my personal keys. I also had low vitamin D levels, which would have played a role. If you’re interested in learning more about the Symptoms for Vitamin D Deficiency you can read my blog post on that topic. I discuss the risk factors for vitamin D deficiency and how to support healthy vitamin D levels.
Simple daily rituals like hydration, herbal teas, and the right nutrients can help lift mental fog and support clearer focus.
Step 3: Feed and Fuel Your Brain
Once you have your results, it’s time to nourish your brain. No amount of supplements can undo the effects of a poor diet, so start with real food and steady blood sugar.
Focus on:
- Protein at every meal to stabilize energy and build neurotransmitters
- Healthy fats — salmon, avocado, olive oil, flax, and chia support brain cell membranes
- Colorful veggies and leafy greens for antioxidants and natural folate
- Mineral-rich foods — pumpkin seeds (zinc), cacao (magnesium), eggs (choline)
- Hydration — even mild dehydration slows cognition
Key nutrients that often help:
- B-vitamins: Especially methylated B12, B6, and folate for women with MTHFR variants like myself [3]
- Vitamin D: Supports mood and cognitive function; deficiency is common in northern climates [1]
- Omega-3 fatty acids (EPA/DHA): Support membranes and reduce brain inflammation [2]
- Magnesium: Calms the nervous system and supports focus and sleep
- Probiotics & prebiotics: Feed the gut-brain connection [5]
A few simple swaps — like trading sugary breakfast bars for eggs and greens, or replacing afternoon caffeine with mineral water and a handful of pumpkin seeds — can do more than you’d think.
Step 4: Calm Your System to Clear Your Mind
You can eat perfectly and still feel foggy if your nervous system is stuck in survival mode. Chronic stress, sleep deprivation, and lack of movement all impact brain circulation and energy metabolism.
Start small:
- Sleep: Most adults need 7–9 hours; a regular schedule supports memory and attention [7].
- Stress: Breathwork, journaling, yoga, sunlight, or a short walk can flip you from “fight or flight” to “rest and digest.”
- Exercise: Regular moderate activity improves blood flow, mood, and cognitive performance.
- Digital hygiene: Dim screens at night; push notifications off; charge your phone outside the bedroom.
Your brain can’t thrive if your body feels unsafe. The calmer your system, the clearer your thoughts become.
7-Day Clarity Kickstart (Quick Wins If You’re Busy)
Day 1: Add 20–30g protein at breakfast (eggs, Greek yogurt, tofu, or a protein smoothie).
Day 2: Walk 10–20 minutes outside after lunch (helps blood sugar + circadian rhythm).
Day 3: Lights down at 9:30 p.m., screens off by 10; in bed by 10:30 (aim for 7.5–8h).
Day 4: Swap your afternoon coffee for mineral water + a handful of pumpkin seeds
Day 5: Add leafy greens + 1 Tbsp olive oil to lunch (folate + healthy fats).
Day 6: Journal for 5 minutes: When is your fog worst? What helps? Track your clues.
Day 7: Protein + color + fiber at each meal; prep a simple salmon or bean-based dinner with veggies.
If you tolerate supplements (and your doctor agrees), consider adding magnesium in the evening and omega-3s with lunch this week [2]. If you suspect you need B-vitamins, or vitamin D, talk with your doctor and check labs first [1,3].
Common Mistakes That Keep Brain Fog Hanging Around
- Skipping protein at breakfast and lunch
- Under sleeping during the week and “catching up” on weekends (your brain hates the swing) [7]
- Relying on caffeine to power through the mid-afternoon dip (it’s usually a mineral, water, or blood sugar problem)
- Taking random brain supplements without labs (may help short-term but miss the real cause)
- Ignoring gut symptoms like bloating, reflux, or irregularity (the gut-brain connection is real) [5]
Low energy, brain fog, or feeling run-down can be signs your iron needs support. This free guide and meal plan share simple, food-first ways to support iron absorption, steady your energy, and rebuild your iron levels naturally.
You Can Think Clearly Again — One Step at a Time
Brain fog isn’t a character flaw, or even necessarily a sign of aging. It’s a message — your body asking for better fuel, rest, and balance.
So how do you get rid of brain fog? Start by finding root causes. Get the right labs done. Rebuild your nutrients. Support your nervous system. It’s not about perfection — it’s about small, consistent steps that help your body and brain work together again.
🔍 If you’re tired of guessing, The Calm & Clear Method helps women uncover the hidden gut, and nutrient imbalances behind brain fog, cravings, and burnout. It’s a three-month journey to reclaim your digestion, soothe anxiety, balance your nervous system, and feel clear again.
🌱 Prefer starting small? Grab my free guide — 5 Ways to Support Iron Levels Naturally — simple steps to support your iron levels and feel balanced again. Check out all the free guides in the freebies library.
🎥 And if you’d rather watch than read, my free 15-minute mini-masterclass is on my Work With Me page — I walk you through exactly how I help women calm cravings, reset their gut, balance their nervous system, and feel like themselves again.
Be well,
Alysha Breanne
More Wellness Reads:
Alysha Breanne, CHN, CFNP — Certified Holistic and Functional Nutritionist helping women with iron deficiency, low ferritin, fatigue, and absorption issues restore steady energy using personalized nutrition and testing when needed.