Abalone is a nutrient-dense shellfish that delivers nearly 20 grams of protein per 100-gram serving with only 149 calories and under 4 grams of fat. It’s an excellent source of vitamin B12, iodine, and selenium, placing it among the more nutritionally impressive shellfish you can eat. Whether fresh, canned, or dried, abalone offers real benefits for your thyroid, heart, and immune system.
Protein and Calorie Breakdown
A 100-gram serving of cooked abalone contains about 149 calories, 20 grams of protein, 3.7 grams of fat, and 7.4 grams of carbohydrates. That protein-to-calorie ratio is comparable to chicken breast, making abalone a lean, high-quality protein source. The carbohydrate content is higher than most seafood, largely due to glycogen stored in the muscle tissue, but it’s still a low-calorie food overall.
Vitamin B12, Iodine, and Selenium
Where abalone really stands out is its micronutrient density. Green lip abalone, one of the most commonly farmed species, contains roughly 15 micrograms of vitamin B12 per 100 grams. That’s more than six times the daily recommended intake for adults. B12 is essential for nerve function, red blood cell production, and DNA synthesis, and deficiency is surprisingly common, especially in older adults and people who eat little animal protein.
Abalone also delivers about 202 micrograms of iodine per 100 grams, which exceeds the daily recommended intake of 150 micrograms in a single serving. Your thyroid gland needs iodine to produce its two key hormones, which regulate metabolism, growth, and energy use throughout your body. Without enough iodine, the thyroid can’t do its job properly, leading to fatigue, weight changes, and other metabolic problems. For people who don’t use iodized salt regularly, abalone is one of the richest natural food sources of this mineral.
Selenium rounds out the picture at about 22 micrograms per 100 grams, covering roughly 40% of daily needs. Selenium supports your immune system and works as a building block for antioxidant enzymes that protect cells from damage. It also plays a direct role in thyroid function, working alongside iodine to keep hormone production on track. You’ll also get 65 milligrams of magnesium per serving, contributing to muscle and nerve function.
Heart Health and Omega-3 Fats
Abalone contains omega-3 fatty acids, though in modest amounts compared to fatty fish like salmon or mackerel. A serving provides roughly 53 milligrams of DHA and 15 milligrams of EPA. These are the two omega-3s most strongly linked to cardiovascular benefits, including reduced inflammation and improved blood lipid levels. You’d need to eat abalone frequently, or pair it with other seafood, to hit the levels typically associated with heart protection.
That said, research on oil extracted from abalone viscera shows promising effects on cholesterol. In animal studies, abalone viscera oil significantly reduced levels of triglycerides, total cholesterol, and LDL (the “bad” cholesterol) while raising HDL (the “good” cholesterol) in mice fed a high-fat diet. The oil’s fat profile is notable: unsaturated fats make up about 57% of the total, with EPA and oleic acid among the dominant types. While these are animal studies rather than human trials, they align with broader evidence that marine-sourced fats support healthy blood lipid levels.
Antioxidant and Anti-Inflammatory Compounds
Beyond standard vitamins and minerals, abalone contains bioactive peptides with antioxidant and anti-inflammatory properties. Researchers have isolated specific peptides from abalone tissue, particularly from the viscera, that protect cells against oxidative damage. In lab studies, these peptides boosted the activity of the body’s own antioxidant defense enzymes and reduced markers of cellular damage. One peptide performed comparably to vitamin C in protecting liver cells from oxidative stress.
These compounds are still being studied in isolation, and eating whole abalone won’t deliver them in concentrated therapeutic doses. But the presence of these peptides helps explain why abalone, like many shellfish, offers benefits beyond what its basic nutrition label suggests.
Mercury and Safety
One of abalone’s practical advantages over many other types of seafood is its position on the food chain. Abalone are herbivores that feed on algae, which means they don’t accumulate mercury the way predatory fish do. The FDA’s monitoring data on commercial shellfish consistently places mollusks well below the mercury levels found in tuna, swordfish, and other large predatory species. For context, fresh salmon averages about 0.022 parts per million of mercury. Abalone, as a plant-eating mollusk, sits in a similar low-risk category, making it a safe choice even for people who are cautious about seafood contaminants.
Shellfish Allergy and Cross-Reactivity
If you have a shellfish allergy, abalone may not be safe for you, even if your allergy was diagnosed based on shrimp or crab. The main allergen in shellfish is a protein called tropomyosin, which triggers an immune response in about 70% of all shellfish allergies. Research on abalone tropomyosin shows clear cross-reactivity with shrimp: antibodies produced in response to shrimp allergens bind to abalone proteins, and vice versa. This means your immune system may not distinguish between the two.
Abalone is a mollusk, not a crustacean, and some people with crustacean allergies can tolerate mollusks without issues. But the overlap in allergen structure makes it unpredictable. If you’ve had allergic reactions to any shellfish, getting tested before trying abalone is the safest approach.
How Abalone Compares to Other Shellfish
- Versus shrimp: Abalone has more protein per serving and significantly more vitamin B12 and iodine. Shrimp is more widely available and cheaper.
- Versus oysters: Both are micronutrient powerhouses. Oysters provide more zinc, while abalone delivers more protein and iodine. Oysters are typically eaten raw, whereas abalone is almost always cooked.
- Versus salmon: Salmon wins on omega-3 content by a wide margin. Abalone wins on iodine, B12, and leanness. They complement each other well in a varied seafood diet.
The biggest practical downside of abalone is cost and availability. Wild abalone is harvested under strict regulations in most countries, and farmed abalone remains a premium product. Canned abalone, common in Asian grocery stores, offers a more affordable entry point with a similar nutritional profile, though sodium content can be higher depending on the brine.