Clinician handoff
Electrolytes
Designed for a 60-second scan in primary care. Use this to explain why this theory fits, what would weaken it, and which tests are most worth discussing.
Why this still fits
My brain fog gets worse after heat, sweating, dehydration, fasting, or high-fluid days, and I want to check whether electrolytes are part of the problem versus blood sugar or another overlap.
What would weaken it
- -No relationship at all to heat, sweating, fasting, GI losses, hydration, or salt intake.
- -No associated cramps, palpitations, headaches, or washed-out episodes that suggest depletion.
- -A much stronger fit with blood sugar crashes, sleep loss, or anxiety-driven episodes.
Key points to communicate
- •I want sodium, potassium, magnesium, calcium, and basic hydration context checked together.
- •Please review my current medications for any that might affect electrolyte balance (diuretics, SSRIs, lithium, PPIs).
- •Please tell me if my symptoms fit blood sugar or POTS better than electrolytes.
- •If you think salt loading is unsafe for me, I want to know why before trying it on my own.
Bring this to the visit
- •Recent CMP or BMP results showing sodium, potassium, magnesium, calcium.
- •A description of fluid and salt intake, especially if on a restricted diet.
- •Medication list: diuretics, laxatives, PPIs, and anything that affects electrolyte balance.
- •Activity level and sweating patterns, especially if exercising heavily.
Useful screening structure
- -CMP (Comprehensive Metabolic Panel) as the standard electrolyte screen.
- -Magnesium (serum and/or RBC magnesium if serum is normal but suspicion is high).
- -Spot urine electrolytes if chronic losses are suspected.
Tests and measurements to discuss
Basic Metabolic Panel (CMP)
RBC Magnesium
What this helps clarify: Intracellular magnesium - serum levels miss deficiency
Range context
5.0–6.5 mg/dL
How to use the result
Save the result with date and symptoms from the same week.
Serum Osmolality
What this helps clarify: Dehydration marker - affects cognitive performance
Range context
275–295 mOsm/kg
How to use the result
Save the result with date and symptoms from the same week.
Medication review for electrolyte-depleting drugs
What this helps clarify: Medication-related brain fog is often missed because nobody lays the full timeline out in one place.
Range context
Structured medication timeline + risk review
How to use the result
Ask whether a pharmacist-led medication therapy management review is available.
Questions to ask directly
- •Could my electrolyte levels explain the fog even if they are technically in the normal range?
- •Should we check RBC magnesium in addition to serum magnesium?
- •Are my medications or diet likely depleting specific electrolytes?
- •What replacement strategy makes sense: dietary changes, supplements, or both?
Functional impact snapshot
- -Track fog severity relative to hydration, salt intake, and exercise days.
- -Note whether supplementing magnesium, potassium, or sodium changes symptoms within days.
- -Rate cognitive function on days with adequate electrolyte intake vs restricted days.
Escalate instead of self-managing if
- •Severe hyponatremia symptoms: confusion, seizures, nausea, headache.
- •Cardiac arrhythmia symptoms with potassium or magnesium abnormalities.
- •Muscle weakness, paralysis, or respiratory difficulty with severe electrolyte derangement.
Peer-reviewed references