Your body produces uric acid every day as a natural byproduct of breaking down compounds called purines. These purines come from two places: the food and drinks you consume, and the constant recycling of your own cells. A specific enzyme in your liver converts purines into uric acid through a two-step chemical reaction, and your kidneys then flush most of it out through urine. Problems arise when production outpaces removal.
How Your Body Makes Uric Acid
Purines are molecules found in every cell of your body, embedded in your DNA and RNA. When cells die and get replaced, those purines are released and need to be processed. Your liver handles this job using an enzyme called xanthine oxidase, which converts purines first into an intermediate compound (hypoxanthine to xanthine) and then into uric acid. This is a normal, ongoing process that happens whether or not you eat a single bite of food.
Your body also builds purines from scratch through a process called de novo synthesis. So the three routes to uric acid are: dietary purines, breakdown of your own cells, and fresh purine production. Any condition that accelerates cell turnover, such as certain blood cancers or their treatments, can flood the system with purines and spike uric acid levels dramatically.
Foods That Raise Uric Acid
Certain foods are packed with purines and contribute directly to uric acid production. The National Kidney Foundation flags these as the biggest offenders: organ meats (liver, kidneys, sweetbreads), anchovies, sardines, herring, tuna, codfish, shellfish (scallops, mussels, lobster, shrimp, oysters), trout, haddock, bacon, wild game, and goose. Meat-based gravies also concentrate purines from cooking.
That said, diet alone isn’t usually the whole story. Your body generates the majority of its uric acid internally, and dietary purines add to that baseline. This is why two people can eat the same steak dinner and end up with very different uric acid levels. Genetics, kidney function, and metabolic health all determine how efficiently you process and eliminate what your body produces.
The Fructose Connection
Sugar, specifically fructose, raises uric acid through a completely different mechanism than purine-rich foods. When your liver processes fructose, it rapidly burns through ATP, your cells’ energy currency. This reaction is unusually fast and has no built-in braking system. The result is a sharp drop in both ATP and the phosphate molecules your cells need to function.
That phosphate crash triggers a chain reaction. Your cells start breaking down their own energy reserves (AMP) at an accelerated rate, and the debris from that breakdown gets funneled straight into the purine degradation pathway, ultimately producing uric acid. This means a large soda or a meal heavy in high-fructose corn syrup can spike your uric acid levels not by delivering purines directly, but by forcing your liver cells to cannibalize their own energy stores.
How Alcohol Contributes
Alcohol raises uric acid through a double hit: it increases production and reduces excretion at the same time. Beer is the worst offender because it’s rich in purines from the yeast used in brewing, and it also contains D-amino acids that your body converts into uric acid through additional pathways. The ethanol in beer further impairs the kidney’s urate transporters, making it harder to flush uric acid out.
Spirits work differently. They’re lower in purines than beer, but their high ethanol concentration promotes lactic acid buildup during metabolism. That lactic acid competes with uric acid for the same exit route in the kidneys, essentially cutting in line and blocking uric acid from being excreted. The result is the same: higher levels in your blood.
How Your Body Gets Rid of Uric Acid
Under normal conditions, about two-thirds of uric acid leaves through your kidneys in urine, and the remaining one-third exits through your gut. Both routes rely on specialized transporter proteins that actively shuttle uric acid out of your body. When these transporters malfunction, whether from genetics, disease, or medication, uric acid accumulates in the blood.
The kidney’s role is especially important and surprisingly fragile. Your kidneys actually filter out most uric acid and then reabsorb a large portion of it back into the bloodstream. The balance between what gets reabsorbed and what gets excreted determines your blood level. When the gut pathway is impaired, the kidneys try to compensate by excreting more, but this workaround has limits and can strain kidney function over time.
Insulin Resistance and Uric Acid Retention
High insulin levels directly cause your kidneys to hold onto more uric acid. Insulin increases the activity of a reabsorption transporter in the kidneys while simultaneously reducing the activity of an excretion transporter. The net effect is that less uric acid makes it into your urine and more stays in your blood. Research has shown that the degree of insulin resistance correlates with how much uric acid the kidneys reabsorb.
This creates a vicious cycle commonly seen in metabolic syndrome. Excess weight and poor blood sugar control drive insulin levels up, which raises uric acid, which itself promotes inflammation and further metabolic dysfunction. It’s one reason why high uric acid levels often cluster with high blood pressure, elevated blood sugar, and abdominal obesity.
Medications That Raise Levels
Several common medications interfere with uric acid excretion. Diuretics (water pills) are among the most frequent culprits. They cause salt and water loss that concentrates uric acid in the blood, and they also affect ion exchangers in the kidneys that increase uric acid reabsorption. This applies broadly across diuretic types: loop diuretics, thiazide diuretics, thiazide-like diuretics, and even some potassium-sparing varieties like spironolactone.
Other blood pressure medications, including beta blockers and certain calcium channel blockers, have also been linked to elevated uric acid. If you’re taking any of these and your levels are running high, that medication may be a contributing factor worth discussing with whoever prescribes it.
What Counts as a High Level
Normal serum uric acid ranges are 4.0 to 8.5 mg/dL for adult men and 2.7 to 7.3 mg/dL for adult women. Hyperuricemia, the clinical term for “too high,” is defined as levels above 6.8 mg/dL. That threshold matters because 6.8 mg/dL is the point at which uric acid can no longer stay dissolved in blood at body temperature. Above that concentration, it can crystallize and deposit in joints (causing gout) or in the kidneys (forming stones).
Being above 6.8 mg/dL doesn’t guarantee you’ll develop symptoms. Many people run elevated levels for years without gout or kidney stones. But the higher and longer your levels stay elevated, the greater the risk that crystals will eventually form and cause problems.