Anion Gap
The anion gap is a calculated number that estimates the balance of charged particles in your blood. It's typically figured by subtracting measured chloride and bicarbonate from your sodium.
The gap helps your clinician evaluate your body's acid-base balance and narrow down the cause when your blood is more acidic than usual. It's a useful screening calculation rather than a direct measurement.
A high anion gap can suggest a buildup of certain acids in the blood, which has many possible causes ranging from dehydration to metabolic conditions. It's a signal to look further, not a diagnosis on its own.
A low anion gap is uncommon and can relate to low albumin or lab factors; it's usually interpreted with the rest of your panel.
There's no personal target; the gap is a diagnostic tool interpreted with your electrolytes and clinical picture. Your clinician can explain what yours means.
Sources
Educational context only, not medical advice or a diagnosis. Reference ranges vary by lab, age and sex; always discuss your results with a clinician.