How to Solve Issues With age-specific AG reference ranges
https://anion-gap-values214.wordcanopy.com/posts/anion-gap-calculator-for-assessing-electrolyte-imbalance
Low anion-gap reduced causes may include hypoalbuminemia, laboratory error, and elevated lithium exposure or bromide intake. Review electrolytes, albumin level, renal status, and acid–base balance to identify the root metabolic disturbance.