Your body excretes uric acid through two main routes: roughly two-thirds leaves through the kidneys in urine, and the remaining third exits through the digestive tract. When either pathway slows down, uric acid builds up in the blood, potentially leading to gout, kidney stones, or joint pain. The good news is that several practical strategies can help both routes work more efficiently.
Normal uric acid levels range from 3.4 to 7.0 mg/dL in men and 2.4 to 5.7 mg/dL in women. If your levels are above those thresholds, the strategies below can make a measurable difference.
How Your Body Removes Uric Acid
Uric acid is the end product of purine breakdown. Purines come from two sources: your own cells recycling their DNA, and the food you eat (especially organ meats, shellfish, and certain fish). Your liver processes purines into uric acid, which dissolves in the blood, travels to the kidneys, and gets filtered into urine. A significant portion also gets shuttled into the intestines by specialized transport proteins, where gut bacteria break it down further.
Problems arise when the kidneys reabsorb too much uric acid back into the bloodstream instead of letting it pass into urine, or when the intestinal pathway gets disrupted. Most people with high uric acid are “under-excreters” rather than overproducers, meaning their removal systems aren’t keeping up.
Drink Enough Water, but Know the Ceiling
Staying well hydrated is the single most accessible way to boost uric acid excretion. More water flowing through your kidneys means more uric acid gets flushed out and the urine stays dilute enough to prevent crystal formation. But the benefit has a clear limit.
A large cross-sectional study using U.S. national health data found an L-shaped relationship between water intake and uric acid levels. Below about 7.6 mL of plain water per kilogram of body weight per day, every additional 1 mL/kg was associated with a 0.16 mg/dL drop in serum uric acid. That’s a meaningful reduction. For a 175-pound (80 kg) person, the threshold works out to roughly 600 mL, or about 2.5 cups of plain water. Below that minimum, you’re leaving easy gains on the table.
Once intake crossed that threshold, additional water had virtually no further effect on uric acid levels. The same pattern held for total fluid intake (water plus moisture from food), with a cutoff around 33.6 mL/kg. For that same 80 kg person, that’s about 2.7 liters of total daily fluid. So drinking adequate water matters a lot, but chugging excessive amounts won’t keep pushing levels lower.
Make Your Urine Less Acidic
Uric acid is far more soluble in alkaline urine than in acidic urine. When urine pH is low (more acidic), uric acid crystallizes more easily and less of it gets excreted. Raising urine pH from 5.9 to 6.5 increased daily uric acid excretion from about 303 mg to 413 mg in a controlled diet study, even though the alkaline diet contained fewer purines. That’s a 36% increase in excretion just from changing the pH of the urine.
You can nudge your urine toward a more alkaline state by eating more fruits and vegetables, particularly those rich in potassium and organic acids like citrate. Leafy greens, bananas, potatoes, citrus fruits, and tomatoes all have an alkalizing effect. On the other hand, heavy meat consumption, refined grains, and processed foods push urine in the acidic direction. It takes about three days of consistent dietary changes for urine pH to reach a new steady state, so this isn’t an overnight fix but it works reliably.
Cut Back on Fructose
Fructose is a double threat when it comes to uric acid. It increases uric acid production (your liver generates uric acid as a byproduct of fructose metabolism), and it simultaneously blocks one of your body’s key excretion pathways. Research shows that fructose triggers oxidative stress in the intestinal lining, which disables a transport protein responsible for pumping uric acid into the gut for elimination. Even a single dose of fructose was enough to suppress this intestinal excretion pathway in animal studies.
The biggest culprits are sugar-sweetened beverages, fruit juices, and foods made with high-fructose corn syrup. Whole fruits contain fructose too, but in much smaller amounts and paired with fiber that slows absorption. If you’re trying to lower uric acid, cutting sugary drinks is one of the highest-impact changes you can make.
Coffee Has a Specific Excretion Benefit
Coffee drinkers consistently show lower uric acid levels, and recent research has identified a direct mechanism. Caffeine blocks several of the kidney’s uric acid reabsorption transporters, meaning more uric acid passes through into the urine instead of being recycled back into the blood. At concentrations above 0.2 mM (roughly what you’d get from regular coffee consumption), caffeine inhibited multiple transporter proteins involved in pulling uric acid back from the kidneys.
Caffeine was also especially effective at blocking insulin-driven uric acid reabsorption, which is relevant for people with insulin resistance or metabolic syndrome, both common companions of high uric acid. Decaf coffee has also been linked to lower uric acid in observational studies, suggesting that other compounds in coffee may contribute as well.
Exercise Helps, but Intensity Matters
Regular moderate exercise supports healthy uric acid levels through improved kidney function, better insulin sensitivity, and weight management. But high-intensity and heavy resistance exercise can temporarily raise uric acid levels by producing large amounts of lactic acid. Lactic acid competes with uric acid for the same excretion pathways in the kidneys, effectively blocking uric acid removal during and after intense workouts.
This doesn’t mean you should avoid exercise. It means that if you’re actively trying to lower uric acid, steady moderate activity like brisk walking, cycling, or swimming is more helpful than repeated all-out efforts. If you do intense training, staying well hydrated before, during, and after becomes even more important to offset the temporary excretion bottleneck.
Vitamin C as a Supplement
Vitamin C has a mild but real uric acid-lowering effect. A double-blinded, placebo-controlled trial found that 500 mg of vitamin C daily for two months reduced serum uric acid by 0.5 mg/dL compared to placebo. That’s a modest drop, but for someone sitting just above the normal range, it could be enough to tip the balance. Vitamin C appears to work by competing with uric acid for reabsorption in the kidneys, allowing more uric acid to exit in urine.
It’s worth noting that 500 mg is easily achieved through a supplement and is well within safe intake levels. Higher doses haven’t been shown to produce proportionally greater benefits.
What About Tart Cherry Juice?
Tart cherry juice is widely promoted for gout and uric acid management, but the evidence for its effect on excretion is weak. A controlled study published in Rheumatology tested tart cherry concentrate at different doses over 28 days and found no significant effect on serum uric acid levels, urinary uric acid excretion, or gout flare frequency. Cherries do contain anti-inflammatory compounds that may help with gout pain through other mechanisms, but they don’t appear to meaningfully increase uric acid removal from the body.
When Lifestyle Changes Aren’t Enough
If your uric acid remains elevated despite dietary and hydration changes, prescription medications called uricosurics can directly increase kidney excretion. These drugs work by blocking the transporters that reabsorb uric acid in the kidneys, forcing more of it into the urine. The three main options are probenecid, benzbromarone, and sulfinpyrazone. They’re typically prescribed when uric acid levels stay high enough to cause recurrent gout flares or kidney stones.
Because uricosurics push more uric acid through the kidneys, they increase the risk of kidney stones if you’re not drinking enough water or if your urine is too acidic. This is why the lifestyle strategies above, especially hydration and urine alkalinization, remain important even when medication is part of the plan.