What Causes High Uric Acid Levels?

Elevated uric acid levels pose a serious health risk, as hyperuricemia can lead to multiple complications. In daily life, consuming foods that help lower uric acid may contribute to maintaining good health. So, what causes elevated uric acid levels?

Causes of Elevated Uric Acid Levels

Hyperuricemia may result from purine metabolism disorders and increased uric acid synthesis. Excessive intake of exogenous purines is another key factor: uric acid levels correlate directly with dietary purine content. Approximately 50% of ingested RNA and 25% of ingested DNA are metabolized and excreted in the urine as uric acid. Strictly limiting dietary purine intake can reduce serum uric acid concentration to approximately 60 µmol/L and urinary uric acid excretion to about 1.2 mmol/day.

Overproduction of endogenous purines may also cause hyperuricemia. Endogenous purine metabolic disorders are more clinically significant than exogenous factors. De novo purine synthesis—from noncyclic precursors to the purine ring—involves 11 enzymatic steps; abnormalities in any of these enzymes may lead to excessive purine production and consequently elevated uric acid. Increased purine metabolism occurs in conditions such as chronic hemolytic anemia, rhabdomyolysis, polycythemia vera, myeloproliferative disorders, and during chemotherapy or radiotherapy. Excessive physical exertion, status epilepticus, and types I, III, and V glycogen storage diseases accelerate skeletal muscle ATP degradation. Similarly, myocardial infarction, smoking, and acute respiratory failure are associated with accelerated ATP breakdown.

Reduced renal uric acid excretion—due to drugs, toxins, or endogenous metabolic byproducts—can also elevate serum uric acid levels. This may occur when the anion transport system in the renal tubules is inhibited; two major inhibitory factors are lactic acid and ketoacids.

We hope this article has been helpful. Wishing you a joyful life and optimal health!