Gout develops when uric acid in your blood rises high enough to form sharp crystals inside your joints. This happens when your body either produces too much uric acid, can’t flush enough of it through the kidneys, or both. Around 3.9% of adults in the United States have gout, and the condition stems from a mix of diet, genetics, medications, and other health conditions that tip the balance toward uric acid buildup.
How Uric Acid Becomes a Problem
Your body constantly produces uric acid as it breaks down purines, natural compounds found in your cells and in many foods. Normally, uric acid dissolves in your blood, passes through your kidneys, and leaves your body in urine. The system works fine as long as blood levels stay below about 6 mg/dL, the point at which uric acid remains dissolved.
Above that threshold, uric acid starts to crystallize. The process isn’t instant. Uric acid molecules first clump into tiny, fiber-like structures too small to see. These clump together into larger ball-shaped clusters, which then transform into needle-shaped crystals. These crystals settle in and around joints, especially cooler ones like the big toe, and trigger an intense inflammatory response. That’s what causes the sudden, severe pain of a gout flare.
Foods and Drinks That Raise Uric Acid
Purines in food break down into uric acid during digestion, so eating a lot of high-purine foods directly increases how much uric acid your body has to process. The biggest dietary offenders include organ meats (liver, kidneys, sweetbreads), game meats like venison and veal, and certain seafood: herring, scallops, mussels, tuna, trout, and haddock. Red meat, turkey (especially processed deli turkey), gravy, meat sauces, and yeast extract also rank high.
But purines from food are only part of the picture. Sugar, particularly fructose, drives uric acid production through a completely separate pathway. When your liver processes fructose, it burns through energy stores rapidly and ramps up the machinery that builds new purines from scratch. Fructose also increases the activity of the enzyme that converts those purines into uric acid. This effect is dose-dependent: the more fructose you consume, the more uric acid your body generates. Sugary drinks, sweets, and anything made with high-fructose corn syrup are major triggers for this reason, and they’re easy to overconsume without realizing it.
Why Alcohol Is a Double Problem
Alcohol raises gout risk through two mechanisms at once. First, beer and some other alcoholic drinks contain purines themselves. Second, and more importantly, alcohol interferes with your kidneys’ ability to clear uric acid. Instead of being filtered out, uric acid gets pulled back into your bloodstream, where it accumulates.
A study of 724 gout patients over 12 months found that drinking more than one alcoholic beverage in a 24-hour period increased the risk of a gout flare by 36%. The type of alcohol didn’t matter much. Wine, beer, and spirits all raised flare risk at similar levels of consumption: one to two glasses of wine, two to four beers, or two to four servings of liquor were all associated with increased risk within 24 hours. The ethanol itself, not any other ingredient, appears to be the main driver.
Medications That Can Trigger Gout
Several common medications raise uric acid levels by impairing the kidneys’ ability to excrete it. Diuretics (water pills), frequently prescribed for high blood pressure and heart failure, are among the most well-known culprits. They block the transport proteins that move uric acid out of the kidneys and into urine. They also cause fluid loss, which concentrates uric acid in the blood and stimulates the body to reabsorb even more of it.
Low-dose aspirin, the kind many people take daily for heart protection (75 to 300 mg), has a similar effect. At these low doses, aspirin actually promotes uric acid reabsorption in the kidneys. Paradoxically, high-dose aspirin does the opposite and helps the body excrete uric acid, but nobody takes aspirin at those doses for heart health. If you’re on daily low-dose aspirin or a diuretic and you develop gout symptoms, the medication could be a contributing factor. Immunosuppressant drugs, often used after organ transplants, can also impair uric acid clearance.
Genetics and Family History
Your genes play a significant role in determining how efficiently your body handles uric acid. One of the most studied genetic variants involves ABCG2, a protein that acts as a uric acid transporter, helping move it out of the body. A common mutation in this gene reduces uric acid transport by 54%, meaning people who carry it are significantly less efficient at clearing uric acid from their blood. Each copy of this variant raises gout risk by about 68%, and researchers estimate it accounts for roughly 10% of all gout cases in white populations.
Other genetic variants affect different urate transporters in the kidneys and intestines. If gout runs in your family, you may have inherited a less efficient version of one or more of these transporters, which means your uric acid baseline runs higher before diet or other factors even come into play.
Why Gout Is More Common in Men
Men develop gout far more often than premenopausal women, and estrogen is the main reason for the gap. Estrogen promotes uric acid excretion by boosting the activity of ABCG2 transporters, not just in the kidneys but in the intestines as well. Research has confirmed that estrogen levels and uric acid levels are inversely correlated: the higher the estrogen, the lower the uric acid.
This protective effect disappears after menopause, when estrogen levels drop sharply. That’s why gout rates in women climb significantly after age 50 to 60, gradually approaching male rates. Studies in mice have shown that administering estrogen to both males and females with high uric acid levels increased intestinal uric acid excretion and lowered blood levels, confirming the hormone’s direct role.
Kidney Disease and Other Health Conditions
Since your kidneys handle most uric acid excretion, any condition that impairs kidney function can push uric acid levels up. In chronic kidney disease, the gradual loss of filtering capacity means the kidneys retain more and more uric acid as the disease progresses, particularly from stage 3 onward. This creates a feedback loop: high uric acid may further damage the kidneys, and damaged kidneys allow uric acid to climb even higher.
Obesity raises gout risk as well. Excess body fat increases uric acid production and reduces the kidneys’ ability to excrete it. Conditions like metabolic syndrome, type 2 diabetes, and high blood pressure frequently travel together with elevated uric acid, partly because they share underlying mechanisms like insulin resistance. Insulin resistance itself reduces uric acid excretion by the kidneys, which is one reason gout often appears alongside these other metabolic conditions.
How These Risk Factors Stack Up
Most people who develop gout don’t have a single cause. It’s typically a combination: maybe a genetic predisposition that keeps uric acid slightly elevated, combined with a diet high in red meat or sugary drinks, a daily diuretic for blood pressure, and some extra body weight. Each factor nudges uric acid levels a little higher until they cross the crystallization threshold and stay there long enough for crystals to form and accumulate.
The practical takeaway is that the factors you can modify, such as diet, alcohol intake, body weight, and sugar consumption, matter most for the people who already have non-modifiable risk factors like genetics, male sex, kidney disease, or necessary medications. Reducing purine-rich foods, cutting back on fructose and alcohol, and maintaining a healthy weight won’t eliminate genetic risk, but they can keep uric acid below the level where crystals form.