Calamari is good for you, especially when it’s not deep-fried. A 100-gram serving of raw squid has just 81 calories and 1.7 grams of fat while delivering a significant amount of protein, covering about a third of a woman’s daily needs and over a quarter of a man’s. It’s one of the leaner seafood options available, packed with micronutrients that are hard to find in many other foods.
Protein and Calories
Squid is a high-protein, low-calorie food. A 4-ounce serving (about 115 grams) of raw squid provides roughly 18 grams of protein and only 104 calories, with just 2 grams of fat. That protein-to-calorie ratio puts it on par with chicken breast and well ahead of most red meats. The protein in squid is complete, meaning it contains all the essential amino acids your body needs for muscle repair, immune function, and enzyme production.
Standout Micronutrients
Where calamari really shines is in a few specific micronutrients that many people don’t get enough of. A single 4-ounce serving provides 242% of your daily value for copper, 94% for selenium, and 62% for vitamin B12.
Copper supports your immune system and helps your body form red blood cells and maintain healthy connective tissue. Selenium acts as an antioxidant, protecting cells from damage and playing a key role in thyroid function. Vitamin B12 is essential for nerve function and the production of DNA, and deficiency is surprisingly common, especially in older adults and people who eat little animal protein. A single serving of calamari covers more than half a day’s worth.
The Cholesterol Question
Squid has a reputation for being high in cholesterol, and on paper the numbers look concerning. An 85-gram serving of uncooked squid contains roughly 198 milligrams of cholesterol. But context matters here. Squid is extremely low in saturated fat, which is the primary dietary driver of elevated LDL (“bad”) cholesterol in your blood. Your body actually absorbs cholesterol from squid poorly, and the overall impact on blood lipid levels appears to be minimal or even slightly favorable.
Current nutrition science has largely moved away from strict dietary cholesterol limits for healthy people. The bigger threats to your heart health are saturated and trans fats, neither of which is present in meaningful amounts in plain squid. Some research has suggested that shellfish consumption can actually reduce blood cholesterol levels, though the evidence isn’t definitive for squid specifically.
Mercury and Safety
Squid is one of the lowest-mercury seafood options you can eat. FDA testing found a mean mercury concentration of just 0.024 parts per million in squid, which places it near the bottom of the scale alongside shrimp, sardines, and tilapia. For comparison, swordfish and shark typically measure above 0.9 ppm. Pregnant women and young children, who are most vulnerable to mercury exposure, can eat squid without the concern that comes with higher-mercury fish like tuna or mackerel.
Fried vs. Grilled: Preparation Changes Everything
This is where most calamari goes wrong nutritionally. The breaded, deep-fried rings you get at restaurants are a fundamentally different food from grilled or sautéed squid. Battering and frying adds refined carbohydrates and dramatically increases both total fat and calorie content, often doubling or tripling the calories per serving. Frying also introduces saturated fats from the cooking oil, which are precisely the fats that raise LDL cholesterol and contribute to heart disease risk.
Grilling, sautéing in a small amount of olive oil, or steaming preserves squid’s natural nutritional advantages. A squeeze of lemon, some garlic, and fresh herbs give you a flavorful dish without burying the health benefits under a layer of batter. If you do order fried calamari occasionally, treat it as an appetizer to share rather than a main course.
Who Benefits Most From Eating Calamari
Calamari fits well into several dietary patterns. If you’re trying to increase protein while keeping calories low, it’s one of the most efficient options in the seafood case. People who struggle to get enough B12, copper, or selenium from their regular diet can fill those gaps with one or two servings per week. Its low mercury levels make it a smart choice for anyone trying to eat more seafood without the contaminant concerns that come with larger predatory fish.
The main group that should be cautious is people with shellfish allergies. Squid is a mollusk, not a crustacean, so a shrimp allergy doesn’t automatically mean you’ll react to squid. But cross-reactivity does occur in some individuals, so if you have any shellfish allergy, it’s worth confirming with an allergist before adding calamari to your rotation.