Tuna is a moderate-purine fish, which means it’s not off-limits if you have gout, but it does require some attention to how much and how often you eat it. Fresh tuna contains about 157 mg of purines per 100 grams, placing it in the middle of the seafood spectrum. That’s enough to contribute to uric acid buildup if you overdo it, but not enough to warrant avoiding it entirely.
Where Tuna Falls on the Purine Scale
Purines are compounds your body breaks down into uric acid. When uric acid accumulates faster than your kidneys can clear it, crystals form in your joints and trigger gout flares. Foods vary widely in how many purines they deliver, and seafood is one of the trickiest categories because the range is so broad.
Tuna sits in the moderate range at roughly 157 mg of purines per 100 grams. For context, anchovies, sardines, and shellfish rank among the highest-purine seafood options and are the ones most gout guidelines flag as risky. Salmon actually contains slightly more purines than tuna at about 177 mg per 100 grams. So if you’ve been eating salmon without issues, tuna is at least comparable and possibly a slightly better choice from a purine standpoint alone.
Canned Tuna vs. Fresh Tuna Steaks
There’s a meaningful difference between what’s in the can and what’s on the grill. Canned tuna contains about 117 mg of purines per 100 grams, roughly 25% less than fresh tuna at 157 mg. The canning process, which involves cooking and draining the fish, likely removes some purines along with the liquid.
If you’re actively managing gout and want to keep tuna in your diet, canned tuna gives you more room. A standard can (about 140 grams drained) would deliver around 164 mg of purines total, which is a manageable amount for a single meal. A fresh tuna steak of the same size would push closer to 220 mg.
The Omega-3 Factor
Here’s where tuna gets interesting for gout specifically. Tuna is rich in omega-3 fatty acids, which have strong anti-inflammatory properties. Research from Boston University found that eating fish rich in omega-3s actually leads to a lower risk of recurrent gout flares. That’s a notable finding because it suggests the anti-inflammatory benefit of certain fish can partially offset the purine content.
This doesn’t mean you can eat unlimited tuna and call it medicine. But it does mean that moderate portions of omega-3-rich fish like tuna may be a net positive compared to replacing those calories with red meat or processed foods, both of which carry their own gout risks. The omega-3s help calm the inflammatory response that makes gout flares so painful in the first place.
How Much Tuna Is Safe
General guidelines for gout suggest keeping lean protein servings, including fish, to about 4 to 6 ounces per day. That’s roughly the size of one small tuna steak or one can of tuna. Staying within that range keeps your purine intake from a single meal in check and leaves room for other foods in your diet that also contain purines (because nearly everything does to some degree).
A practical approach: eating tuna two to three times per week in those moderate portions is unlikely to trigger flares in most people with gout, especially if you’re also managing other dietary factors like alcohol, sugary drinks, and organ meats. If you’re in the middle of an active flare, though, it’s reasonable to cut back on all moderate-purine foods temporarily until the inflammation subsides.
Seafood to Be More Careful With
If you have gout and enjoy seafood, it helps to know which options carry higher risk so you can make tradeoffs. The Mayo Clinic specifically flags anchovies, sardines, shellfish, and codfish as higher-purine choices that deserve more caution than tuna. Shrimp, mussels, and scallops also tend to be on the higher end.
Lower-purine seafood options that give you more flexibility include most white fish like tilapia, cod (despite being flagged, it’s moderate), and sole. But tuna holds a middle ground that works for most people. Choosing canned over fresh, keeping portions at 4 to 6 ounces, and spacing out your fish meals throughout the week lets you get the protein and omega-3 benefits without pushing your uric acid levels into flare territory.