Canned squid is a genuinely nutritious protein source. A one-cup serving (187g) delivers 33.5 grams of protein for just 198 calories and 3 grams of total fat. It’s low in mercury, rich in several hard-to-get micronutrients, and compares favorably to many other canned seafood options. The main watch-outs are sodium and the packing oil, both of which are easy to manage once you know what to look for.
Protein and Calorie Profile
Squid is one of the leanest protein sources you can pull off a shelf. That 198-calorie, one-cup serving contains less than 1 gram of saturated fat, making it comparable to skinless chicken breast in terms of protein density. For anyone tracking macros or trying to increase protein without adding a lot of fat, canned squid fits neatly into the rotation alongside canned tuna and sardines.
The fat content can vary depending on how the squid is packed. Squid canned in oil will have more calories and total fat than squid packed in brine or its own juices. If you’re watching calorie intake, draining the oil helps, though you’ll lose some fat-soluble nutrients in the process.
Vitamin B12, Selenium, and Copper
Where canned squid really stands out is its micronutrient density. A 100-gram portion of squid provides roughly 200% of the recommended daily intake for vitamin B12, a nutrient essential for nerve function and red blood cell production. That’s a higher concentration than you’ll find in most other common proteins, making squid especially valuable for people who tend to run low on B12.
The same serving also covers about 88 to 110% of your daily selenium needs (depending on sex) and around 82% of the recommended copper intake. Selenium supports your immune system and helps regulate thyroid hormones. Copper plays a role in iron metabolism and connective tissue health. Most people don’t think about copper intake at all, which is precisely why foods that deliver it passively are useful.
Cholesterol: Higher Than Fish, but Context Matters
Squid contains roughly 100 mg of cholesterol per 100 grams of dry matter, which is higher than most fin fish and has historically made people nervous. But the actual effect on your blood lipid levels is more nuanced than the raw number suggests.
Animal research published in the journal Lipids found that squid-based diets significantly lowered serum cholesterol and had an even greater effect on triglycerides, regardless of whether additional dietary cholesterol was present. The mechanism likely involves other compounds in squid (particularly taurine, which squid is rich in) that actively improve lipid metabolism. Current dietary guidelines have also moved away from strict cholesterol limits, recognizing that for most people, dietary cholesterol has a modest effect on blood cholesterol compared to saturated fat intake. And with under 1 gram of saturated fat per serving, canned squid scores well on that front.
Mercury Levels Compared to Tuna
If mercury is on your radar, squid is one of the safest seafood choices available. FDA monitoring data shows squid averages just 0.024 parts per million (ppm) of mercury, with a maximum recorded level of 0.07 ppm. For comparison, canned light tuna averages 0.126 ppm, canned albacore tuna averages 0.350 ppm, and fresh yellowfin tuna averages 0.354 ppm.
That means squid contains roughly five times less mercury than canned light tuna and more than fourteen times less than albacore. For pregnant women, children, or anyone eating seafood multiple times per week, this is a meaningful difference. You could eat canned squid frequently without approaching levels that would concern most health agencies.
Sodium Is the Main Downside
This is where canned squid requires some attention. A single 4-ounce can of squid packed in oil can contain around 420 mg of sodium, which is about 28% of the 1,500 mg daily adequate intake recommended by the Institute of Medicine. If you’re eating canned squid as part of a meal that already includes bread, cheese, sauces, or other processed ingredients, sodium adds up quickly.
Your best strategies are straightforward: look for low-sodium versions when available, drain and rinse the squid before eating (this can cut sodium by 30 to 40% in most canned products), and balance the rest of your meal with fresh, unsalted ingredients. If you have high blood pressure or are on a sodium-restricted diet, it’s worth checking the label on whichever brand you buy, since sodium levels vary significantly between manufacturers.
Purines and Gout Risk
Squid is classified as a purine-rich food. Purines are natural compounds that your body breaks down into uric acid, and elevated uric acid levels can trigger gout, a painful form of inflammatory arthritis. If you have gout or a history of hyperuricemia, squid is one of the seafoods you’ll want to limit. This isn’t unique to canned squid; fresh squid, shrimp, and organ meats all fall into the same high-purine category. For people without gout or elevated uric acid, purine content is not a practical concern.
Iodine Content Is Modest
You might assume that because squid comes from the ocean, it’s a strong iodine source. It’s not, at least not compared to other seafood. Squid and other cephalopods average about 9 to 10 micrograms of iodine per 100 grams, which is well below what you’d get from bivalves like mussels or clams (averaging around 48 micrograms per 100 grams). The recommended daily iodine intake for adults is 150 micrograms, so a serving of squid contributes only a small fraction. If thyroid-supporting iodine is your goal, seaweed, dairy, and shellfish like shrimp are more efficient sources.
Sustainability Considerations
Most canned squid on the market comes from either California market squid or imported species from Southeast Asia and South America. California market squid caught with purse seines earns a “Best Choice” green rating from Monterey Bay Aquarium’s Seafood Watch program, with an overall score of 3.5 out of 5. The population is considered likely healthy, bycatch of other species is minimal, and management is moderately effective. There are some concerns about habitat impacts, particularly the capture of squid egg capsules from the seafloor, but overall it’s one of the more sustainable seafood options.
For imported canned squid, sustainability is harder to verify. If the label doesn’t specify where or how the squid was caught, you’re largely guessing. Brands that carry Marine Stewardship Council (MSC) certification or list their sourcing region give you more to work with.
How to Get the Most From Canned Squid
Choose squid packed in olive oil if you want the added benefit of monounsaturated fats, or packed in brine or water if you’re keeping calories and sodium lower. Drain and rinse before using if sodium is a concern. Canned squid works well tossed into pasta, mixed into rice dishes, added to salads, or eaten straight from the can with crackers. Because it’s already cooked and tender, it needs no additional preparation.
For most people, eating canned squid a few times a week is a smart, low-risk way to boost protein, B12, selenium, and copper intake without the mercury burden that comes with many other canned seafood options. The only groups that should be cautious are those managing gout, sodium-sensitive conditions, or specific shellfish allergies.