Suberic acid (octanedioic acid) is a dicarboxylic organic acid measured in urine organic acid testing. Biochemically, it is produced when fatty acids undergo ω-oxidation — an alternative pathway that becomes more active when normal mitochondrial β-oxidation is limited or overwhelmed. Clinically, suberic acid has been used as a metabolic signal for shifts in fatty acid handling and cellular energy balance. Because it reflects a rerouting of fatty acid chemistry, its presence helps map how cells are processing fats and whether complementary pathways (including peroxisomal handling and detox routes) are engaged.

Elevated urinary suberic acid may indicate increased reliance on alternative fatty acid oxidation pathways, often seen when mitochondrial β-oxidation is impaired, fatty acid load is high, or overall cellular energy demand and stress are increased. Higher levels can also accompany periods of prolonged fasting, sustained exercise, or metabolic shifts that push fats into ω-oxidation. Low or undetectable suberic acid is commonly seen when mitochondrial fatty acid oxidation is proceeding efficiently or when fatty acid turnover is low. Interpreting suberic acid requires the full Cellular Zoomer context: patterns across Krebs cycle intermediates, ketone markers, carnitine-related indices, and oxidative stress markers clarify whether a single value reflects transient change or a broader metabolic pattern.

Suberic acid is included in the Cellular Zoomer to flag shifts in fatty acid oxidation and alternative metabolic routing. As part of the panel’s energy and detox modules, it helps link mitochondrial performance, fatty acid handling, and oxidative load to personalize assessments of cellular resilience and metabolic strain.