Several supplements show promise for lowering uric acid or reducing gout flare frequency, but the evidence varies widely. Vitamin C, tart cherry extract, and folic acid have the strongest research behind them, while others like quercetin and fish oil supplements have more mixed results. None replace prescription urate-lowering medication for moderate to severe gout, but some may offer meaningful support alongside standard treatment.
Vitamin C
Vitamin C is the most widely studied supplement for gout. It works by increasing how much uric acid your kidneys flush out. In a randomized, placebo-controlled trial of 184 people, taking 500 mg of vitamin C daily for two months lowered serum uric acid by 0.5 mg/dL compared to no change in the placebo group. Higher doses produce larger effects: 8 grams daily for three to seven days reduced uric acid by 2.0 to 3.1 mg/dL in metabolic studies, though doses that high aren’t practical for long-term use.
A large prospective study of men found that higher vitamin C intake was associated with significantly lower gout risk over time. That said, the American College of Rheumatology’s 2020 gout guidelines conditionally recommend against adding vitamin C supplementation, noting that two small trials in people who already had gout showed “clinically insignificant” changes in uric acid. The takeaway: vitamin C at 500 mg/day may modestly lower uric acid levels, but if you already have established gout, the effect is probably too small on its own to prevent flares.
Tart Cherry Extract
About 25% of people with gout already use cherry products to manage their condition, and there’s reasonable evidence behind the practice. A case-crossover study of 633 gout patients found that cherry consumption was associated with a 35% reduction in the risk of gout flares. A separate prospective trial showed that participants taking tart cherry supplements experienced fewer flares than a control group.
Cherries contain anthocyanins, which are plant compounds that reduce inflammation and appear to lower uric acid. You can get them as tart cherry juice concentrate, capsules, or simply by eating fresh or frozen tart cherries. The research hasn’t settled on an ideal dose, but most studies used the equivalent of about 10 to 20 cherries or one to two tablespoons of tart cherry concentrate daily. Of all the supplements on this list, tart cherry has the most direct evidence for reducing actual gout attacks, not just uric acid numbers.
Quercetin
Quercetin is a plant compound found in onions, apples, and berries. It blocks xanthine oxidase, the same enzyme targeted by the prescription gout drug allopurinol. In lab studies, quercetin actually inhibited this enzyme more potently than allopurinol. It also appears to help the kidneys excrete more uric acid and may reduce uric acid production through a second pathway related to fructose metabolism.
The human evidence is more modest. In one crossover trial, 22 men with elevated uric acid who took 500 mg of quercetin daily for four weeks saw their plasma uric acid drop by about 8%. But a trial using 150 mg/day in 93 overweight subjects found no effect on uric acid, and neither did a study testing 50 to 150 mg/day in healthy volunteers. The pattern suggests you need at least 500 mg daily to see any benefit, and even then the reduction is relatively small. Quercetin is generally well tolerated but hasn’t been tested specifically for preventing gout flares in long-term trials.
Folic Acid
Folic acid is a less well-known option that showed surprisingly strong results in a recent network meta-analysis comparing 13 different dietary supplements. Folic acid at 5 mg/day reduced uric acid by about 57 micromoles per liter, which is a meaningful drop, though still less than what prescription medications like allopurinol typically achieve (100 to 150 micromoles per liter). In the study’s efficacy rankings, folic acid came in second behind almonds, with a 78% probability of being among the most effective uric acid-lowering supplements.
The mechanism isn’t a direct enzyme block. Instead, folic acid appears to work by shifting gut bacteria composition and improving the function of a kidney transporter that helps excrete uric acid. It also lowers homocysteine, which indirectly supports uric acid metabolism. The meta-analysis authors specifically recommended folic acid at 5 mg/day as an add-on therapy for patients who can’t tolerate standard medications. Note that 5 mg is well above the typical dietary supplement dose of 400 to 800 micrograms, so this would need to be a specific high-dose formulation.
Bromelain and Curcumin
These two supplements target inflammation rather than uric acid levels. Bromelain, an enzyme from pineapple stems, reduces the production of inflammatory compounds that drive the pain and swelling of a gout attack. It also breaks down bradykinin, a molecule that contributes to tissue swelling. Clinical studies have shown bromelain benefits several inflammatory conditions, including arthritis.
Curcumin, the active compound in turmeric, works along similar lines by suppressing the inflammatory signaling cascade that amplifies gout flare pain. Neither bromelain nor curcumin will lower your uric acid, so they won’t prevent crystal formation. But they may help manage the acute inflammatory response when a flare hits. Both have poor absorption on their own. Curcumin is typically taken with black pepper extract to improve uptake, and bromelain works best on an empty stomach.
Fish Oil and Omega-3s
This one comes with an important distinction. Eating omega-3-rich fish appears to help, but taking fish oil capsules does not. In a study of 724 gout patients, those who ate fatty fish in the two days before a potential flare had a 33% lower risk of a gout attack compared to those who didn’t. Eating two or more servings brought the risk down by 26%. The benefit held even after accounting for the purines in fish, which would normally be a concern.
Fish oil supplements, on the other hand, showed no protective effect at all. The adjusted odds ratio was essentially 1.0, meaning supplements performed no differently than taking nothing. The researchers noted that the varying doses and regimens people used for fish oil in real life didn’t replicate what eating whole fish accomplished. If you want the omega-3 benefit for gout, salmon, mackerel, and sardines are the way to go, not capsules.
Coffee as a Functional Supplement
Coffee isn’t a supplement in the traditional sense, but many people with gout wonder about it. The data is striking: drinking four to five cups of coffee daily is associated with a 40% reduction in gout risk, and six or more cups with a 56% reduction, based on research highlighted by the Johns Hopkins Arthritis Center. Coffee contains a compound called trimethyl xanthine that inhibits xanthine oxidase, the same enzyme that quercetin and allopurinol target.
Interestingly, decaffeinated coffee showed some benefit but less than regular coffee, while caffeine alone from other sources didn’t replicate the effect. This suggests something specific to coffee beyond caffeine is responsible. If you already drink coffee, this is encouraging. If you don’t, starting a six-cup-a-day habit has its own trade-offs.
Safety Considerations
Most of these supplements are well tolerated at standard doses, but there are real risks to consider if you have kidney disease, which is common in people with gout. The National Kidney Foundation warns that herbal supplements can contain ingredients that harm the kidneys or worsen existing kidney disease, and they can interact with prescription medications by changing how well those drugs work. Some supplements can actually increase uric acid rather than lower it.
High-dose vitamin C (above 1,000 mg/day) raises the risk of kidney stones, which is particularly relevant since people with gout are already prone to uric acid stones. Folic acid at the 5 mg doses used in studies is far above standard supplementation and can mask vitamin B12 deficiency. If you’re taking allopurinol, colchicine, or other gout medications, any supplement that affects uric acid metabolism could potentially alter your drug levels or effectiveness. Review everything you’re taking, including supplements, with whoever manages your gout treatment.