Calamari (Squid)
Food · Protein · Food, Typed Supps
Squid is a lean, mineral-packed seafood — just don't let deep-frying turn it into junk food.
Stage by stage
- Chewing & Breakdown (Mouth & Esophagus): Chewing breaks squid's tightly packed muscle fibres into smaller pieces so stomach acid and enzymes can start unlocking its protein, B12, and minerals.
- Acid Digestion (Stomach): Stomach acid and pepsin denature squid's proteins and free vitamin B12 so it can bind to intrinsic factor for absorption further down the gut.
- Nutrient Absorption (Small Intestine): In the small intestine, amino acids, vitamin B12, copper, selenium, and zinc are absorbed into the bloodstream while the cholesterol squid carries is packaged into micelles.
- Liver Processing (Liver): The liver processes absorbed copper into enzymes like ceruloplasmin, helps regulate the cholesterol load, and directs amino acids and selenium toward tissue repair and antioxidant defenses body-wide.
Timing
Squid is normally eaten as part of a meal rather than on an empty stomach; there's no strict timing requirement, though pairing it with vitamin-C-rich vegetables can modestly boost zinc and iron uptake from the same meal.
Time to effect
- Hours to weeks: Protein and minerals from squid begin absorbing within a couple of hours of eating it, but measurable changes in vitamin B12 or selenium status require weeks of consistent intake.
Allergens
Contains: Molluscs. Derived from what this food is, not from a product label.
Eating patterns
Fits: Pescatarian, Keto, Gluten-free. Depends on the product: Halal, Low-FODMAP.
Satiety
211 on the satiety index, where white bread is 100 — very high. Modelled from the Holt et al. (1995) measurements.
Environmental footprint
13.6 kg CO2e and 3691 litres of freshwater per kg, matched to "Fish (farmed)" in Poore & Nemecek (2018), Science 360.
Cost band
Mid — roughly £11 per kg, as a band midpoint rather than a price.
Key nutrients
Nutrition per 100g
- Calories: 98
- Protein: 20.9g
- Carbohydrate: 0g
- of which sugars: 0g
- Fat: 1.5g
- of which saturated: 0.4g
- Fibre: 0g
- Sodium: 355mg
Food vs. supplement
Squid provides B12, copper, selenium, and complete protein together in one low-calorie package, which is harder to replicate — and generally less necessary to try to replicate — by stacking isolated supplements.
Kitchen tip
Cook squid very briefly at high heat (30-90 seconds) or braise it slowly for 30+ minutes; anything in between causes its proteins to seize up and turn rubbery.
Common myth
"Calamari is bad for you because it's so high in cholesterol." In reality: Squid does carry more cholesterol than most seafood — roughly 233 mg per 100 g raw, notably higher than fish like salmon or cod — but it has almost no saturated fat, and for most people dietary cholesterol has a smaller effect on blood LDL than saturated fat intake does; the bigger everyday health concern is usually the breading, deep-frying oil, and added sodium in restaurant-style fried calamari, not the squid itself.
Recipes that use it
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