What is Sodium?
Sodium is strongly influenced by hydration and hormonal regulation. Abnormal values almost always require context, such as hydration status, medication, and kidney function. It is therefore often assessed together with other electrolytes and kidney markers.
Why is Sodium relevant?
Sodium is the electrolyte that governs your fluid and salt balance — a fairly stable value, because the body actively regulates it. Deviations usually do not signal 'too much or too little salt in the diet' but a disruption in fluid and hormonal regulation. For people with chronic complaints of dizziness, headaches, or fatigue, sodium can be a useful marker within the broader picture.
How to read Sodium in context
Always read sodium alongside potassium, creatinine, and eGFR, and in the context of hydration and any medications. Strong fluid shifts — excessive drinking, intense sport, diarrhea, diuretics — can skew sodium. Symptoms help distinguish a temporary disruption from a pattern that warrants further context.