Halibut
Food · Protein · Food, Typed Supps
Halibut is a lean, mild white fish loaded with protein, selenium, and B12 — just don't expect salmon's omega-3 punch.
Stage by stage
- Chewing & Swallowing (Mouth & Esophagus): Chewing halibut's dense, flaky fillet starts mechanical breakdown, releasing its mild flavor and moisture.
- Protein Breakdown (Stomach): Stomach acid and pepsin denature the fish's muscle proteins, unwinding them so digestive enzymes can access them.
- Nutrient Absorption (Small Intestine): In the small intestine, pancreatic enzymes break halibut protein into amino acids, while selenium, vitamin B12, niacin, and phosphorus are absorbed alongside its modest fat content.
- Repair & Defense (Muscle & Nerve Tissue): Circulating amino acids are directed to muscle for repair and synthesis, while selenium and B12 support antioxidant defenses and nerve function.
Timing
As a meal in itself, halibut is naturally eaten with other foods; pairing it with a little healthy fat (olive oil, avocado) helps absorb its modest fat-soluble nutrients, though its own fat and omega-3 content is much lower than fattier fish like salmon.
Time to effect
- Hours to weeks: Blood amino acid levels rise within a few hours of eating halibut, supporting muscle protein synthesis, while benefits like improved selenium and B12 status build over days to weeks of regular consumption.
Allergens
Contains: Fish. Derived from what this food is, not from a product label.
Eating patterns
Fits: Pescatarian, Kosher, Keto, Gluten-free. Depends on the product: Halal, Low-FODMAP.
Satiety
205 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
Pricey — roughly £20 per kg, as a band midpoint rather than a price.
Key nutrients
Nutrition per 100g
- Calories: 111
- Protein: 22.5g
- Carbohydrate: 0g
- of which sugars: 0g
- Fat: 1.6g
- of which saturated: 0.7g
- Fibre: 0g
- Sodium: 54mg
Food vs. supplement
Halibut delivers complete, highly bioavailable protein alongside selenium, B12, niacin, and phosphorus in one lean package — supplements can match individual nutrient numbers but not this whole-food combination or the low-fat protein density.
Kitchen tip
Cook halibut to just-opaque and flaking (about 145°F/63°C internal) — its low fat content means it goes from perfectly moist to dry within a couple of minutes of overcooking.
Common myth
"Halibut is just as good a source of omega-3s as salmon since it's a fish too." In reality: Halibut is a lean whitefish with only about 0.3-0.5 g of combined EPA and DHA per 100 g cooked — roughly a quarter to a third of what farmed salmon provides — so it should be valued for its lean protein, selenium, and B12, not as a substitute for oily fish.
More in Protein
In the glossary
Sources