Brain fog checklist
Free Resource
30-Day Brain Fog Investigation Checklist
Fix sleep, diet, and movement first — they're free and they work tonight. Then investigate root causes below.
Start Tonight
😴 Sleep — The Foundation
- Wake same time daily (±30 min) — including weekends
- 10 min bright light within 30 min of waking
- No caffeine for first 90 min after waking
- Caffeine cutoff by 1–2pm
- Screens off 60 min before bed
- Room 65–68°F / 18–20°C, fully dark
- 5 min box breathing before sleep (4-4-4-4)
🍳 Diet — Fuel Your Brain
- 16 oz water + pinch of salt before coffee
- Protein breakfast ≥25g within 1 hour of waking
- No added sugar — especially mornings
- Eat real food, not processed
- If bloating/reflux: cut gluten + dairy 14 days
- 20 min walk after your largest meal
🏃 Movement — Your Best Medicine
- 3×/week: 30 min Zone 2 cardio (talk, can't sing)
- 2×/week: resistance training (any form)
- Outdoor > indoor (2× neurotrophin boost)
- If you crash after exercise (PEM): walk only
🚨 Fog Emergency — Right Now
- 16 oz cold water + pinch of salt
- Box breathing 5 min (4-4-4-4 count)
- Stand up and walk 5 minutes
- Eat protein + fat (nuts, egg, cheese)
- Check: did I sleep? eat? take my meds?
🚨 Call your local emergency number if: Sudden fog + one-sided weakness or facial droop · Worst headache of your life · High fever + stiff neck · Confusion escalating over minutes · New fog after head injury with loss of consciousness.
Measure Your Fog
Step 1: Self-Assessment — Dr. Amarfei
▼Rate each: 0 = Never · 1 = Rarely · 2 = Sometimes · 3 = Often · 4 = Almost Always
01I have difficulty concentrating on tasks that used to be easy
02I have "memory gaps" — forgetting appointments, conversations, or where I put things
03I forget words mid-sentence or can't find the right word
04I lose my train of thought mid-conversation or mid-task
05I have trouble falling asleep — thoughts keep cycling
06Sleep is unrefreshing — I wake as tired as when I went to bed
07I re-read paragraphs because info doesn't stick
08I procrastinate or struggle with easy decisions
09I feel like I'm thinking through a thick haze
10Simple tasks (paying bills, writing emails) take much longer
11I have difficulty following group conversations
12I feel disoriented or confused about time / sequence
13My mental clarity fluctuates unpredictably
Below 10Normal range. Monitor — follow up if worsening.
10–20Light. Start with non-negotiables above + Protocol A.
20–30Moderate. Get the blood panel below + Protocol B.
30–40Moderate–severe. Blood panel + specialist. Print the panel for your doctor.
Above 40Severe. Seek medical attention. Rule out inflammation, neurological, medication toxicity.
Step 2: Match Your Symptoms
▼Start with sleep, diet, and movement while you investigate these:
Worst in morning / crashes after meals
Blood sugar instability. Protein ≥25g within 1hr of waking. Cut sugar 14 days. Request HbA1c + fasting glucose.
Unrefreshed despite 7+ hours in bed
Ask doctor for sleep study (polysomnography). Request RERAs scored — UARS causes fog with "normal" results. Try strict sleep hygiene × 14 days.
Digestive symptoms alongside fog
Gut-brain axis. Request SIBO breath test + celiac panel (tTG-IgA). Try 14-day elimination of gluten + dairy.
Post-COVID or post-viral onset
Blood panel + hs-CRP. Consider: low-dose naltrexone, omega-3 DHA 2g/day, creatine 5g/day. If you crash 24–72hr after activity (PEM): pace, don't push.
Fog after medication
List every med + supplement. Common culprits: Statins · Beta-blockers · Antihistamines/Benadryl · PPIs · Benzos · Paracetamol. Ask doctor about alternatives — don't stop meds without asking.
Female 40+ / hot flashes / cycle changes
Perimenopause. Request FSH, estradiol, progesterone. Discuss HRT — oestrogen is neuroprotective.
Heart races / fog worsens on standing
POTS screen: Lie 5 min → take HR → stand → retake at 2, 5, 10 min. HR rise ≥30 bpm = show doctor.
Lifelong focus difficulty (not recent onset)
Screen for adult ADHD. WHO ASRS-v1.1 screener (free, 6 questions). Score ≥4 Part A = formal evaluation.
History of tick bites / joint pain + fog
Lyme testing: ELISA + Western blot. Standard ELISA misses ~54%. Request Western blot directly if suspicious.
Cat/dog owner / bizarre rage episodes
Rare infections: Toxocara/Toxoplasma, Bartonella (cat scratch disease) — underdiagnosed, causes mental deterioration. Blood tests available.
Upper jaw / base-of-skull pain / pressure behind eyes
Deep sinus / fungal sinus infection. ENT sinus endoscopy. Also: denervated upper jaw teeth — panoramic dental X-ray.
Head injury / car accident / contact sports
Post-concussion syndrome. Neuropsychological testing + vestibular assessment. Treatment: graded return to activity.
Show Your Doctor
Step 3: The Brain Fog Blood Panel
▼Show this to your doctor. "Normal" ranges include sick people — optimal ranges are where cognitive symptoms resolve.
TSH
Optimal: 1.0–2.0 mIU/L
Subclinical hypothyroid causes fog even when "normal." Above 2.5 = investigate.
Free T3 + Free T4
Optimal: Upper third of range
Free T3 is the active hormone. TSH alone misses ~40% of thyroid cases.
TPO Antibodies
Optimal: <35 IU/mL
Hashimoto's — autoimmune attack causing cognitive symptoms.
Ferritin
Optimal: 40–100 ng/mL
Below 30 = impaired dopamine synthesis, even without anaemia.
Vitamin B12
Optimal: >500 pg/mL
Below 400 = neurological symptoms. Ask for "active B12."
Vitamin D (25-OH)
Optimal: 40–60 ng/mL
Below 30 = 2.4× cognitive impairment risk. Supplement D3, not D2.
hs-CRP
Optimal: <1.0 mg/L
Systemic inflammation → crosses blood-brain barrier → neuroinflammation.
RBC Magnesium
Optimal: 5.2–6.5 mg/dL
Serum Mg unreliable — RBC magnesium reflects true brain/body status.
HbA1c
Optimal: <5.5%
Blood sugar instability damages microvessels supplying the brain.
AM Cortisol (8am)
Optimal: 10–20 mcg/dL
Too high = hippocampal damage. Too low = adrenal insufficiency.
Folate (RBC)
Optimal: >400 ng/mL
Cofactor for neurotransmitter synthesis.
Iron + TIBC + CBC
Optimal: Normal ranges
Full iron panel + complete blood count screens for anaemia and immune issues.
If testing is refused: "I understand. Since this is affecting my daily function, could we document my symptoms and your assessment in my chart? I'd also like a referral for a second opinion."
Reading your results: "Normal" means you fall within the lab's reference range — which includes sick people. "Optimal" is where cognitive symptoms are least likely. A ferritin of 15 is "normal" but will cause brain fog. Ask where your results fall within optimal, not just whether they're flagged.
Your 30-Day Plan
Step 4: Pick a 30-Day Protocol
▼Pick one. Follow it for 30 days before adding more.
🅰 Lifestyle Reset
Score 10–20, or not sure where to start · Cost: $0
- Follow the non-negotiables above. Sleep, caffeine, protein, hydration, movement. This IS the protocol.
- Check your digestion. Bloating alongside fog = gut-brain axis. Try 14-day elimination of gluten + dairy.
- Manage stress. 5 min box breathing daily. Free, works from day 1.
- Track fog daily. Patterns emerge within 2 weeks.
🅱 Root Cause + Supplements
Score 20–30, or Protocol A didn't resolve after 2 weeks · Cost: $25–75/mo
- Do everything in Protocol A. Supplements can't fix what lifestyle is causing.
- Get the blood panel. Book this week.
- Magnesium L-threonate before bed. 1,000–2,000mg. Only form that crosses blood-brain barrier. ~$15/mo.
- Creatine monohydrate 5g/day. Increases brain ATP 5–15%. Strongest nootropic evidence. ~$10/mo.
- Omega-3 DHA 1–2g/day. Anti-inflammatory. Take with a fatty meal. ~$20/mo.
- Cut sugar + seed oils 14 days. Diagnostic, not a diet.
🅲 Medical Investigation
Score 30+, or fog 3+ months with no improvement · Cost: doctor visits + testing
- Do Protocols A + B. Foundations still matter while investigating.
- Full blood panel + autoimmune screen: ANA, ESR, tissue transglutaminase (celiac).
- Work through symptom guide above. Follow matching action for your pattern.
- Request MoCA screening — 10-minute cognitive baseline.
- If blood work is normal: Investigate ADHD, Lyme, SIBO, sleep apnea/UARS, post-concussion.
- Specialists: Endocrinologist · Sleep medicine · Neurologist · Psychiatrist · Gastro · Functional MD.
Protocol Rules: (1) Add one new thing per week. (2) Give each change 14 days. (3) Aim for 80% compliance, not 100%. (4) Re-score assessment on Day 30 and Day 60.
Supplements (Last, On Purpose)
Supplement Timing — Protocol B onward
▼Not a starting point. Fix lifestyle first.
☀️ Morning + food
Creatine, omega-3 DHA, B-complex, vitamin D3, iron (if deficient)
Separate iron from calcium, coffee, tea by 2+ hours.
🌤️ Afternoon + food
CoQ10, NAC
CoQ10 is fat-soluble — take with fat-containing meal.
🌙 Before bed
Magnesium L-threonate
Promotes sleep. Don't combine with Mg citrate (laxative).
⚠️ Iron + calcium: separate 4 hrs. 5-HTP + SSRIs/SNRIs: do not combine (serotonin syndrome risk). Benadryl blocks acetylcholine — switch to cetirizine. No supplement replaces a diagnosis.
30-Day Brain Fog Investigation Checklist · Version 2
Medically reviewed by Dr. Alexandru-Theodor Amarfei, M.D.
Published by SureOKGo · sureokgo.com
Educational purposes only — not medical advice.
© 2026 SureOKGo. Free to share.
Medically reviewed by Dr. Alexandru-Theodor Amarfei, M.D.
Published by SureOKGo · sureokgo.com
Educational purposes only — not medical advice.
© 2026 SureOKGo. Free to share.
