Morwong

Food · Protein · Food, Typed Supps

An everyday Australian fish that’s a genuine source of iodine, a nutrient most foods barely contain.

Stage by stage

Intake (Chewing & digestion begins): Chewing begins breaking down the fillet’s protein and fat structure.
Stomach (Protein digestion starts): Stomach enzymes begin breaking down the fish protein.
Small intestine (Iodine & nutrients absorbed): Iodine, omega-3 fats, B12 and selenium are absorbed in the small intestine.
Bloodstream & thyroid (Thyroid hormone production): Iodine is taken up by the thyroid to build thyroid hormone; omega-3s are built into cell membranes.

Timing

Any meal — its own fat content is enough to carry its fat-soluble nutrients.

Time to effect

Days to weeks: Thyroid hormone synthesis responds to iodine intake within days; consistent intake keeps stores topped up since the body holds little in reserve.

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

169 on the satiety index, where white bread is 100 — high. Modelled from the Holt et al. (1995) measurements.

Cost band

Mid — roughly £11 per kg, as a band midpoint rather than a price.

Key nutrients

Iodine
Vitamin B12
Selenium
Omega-3

Nutrition per 100g

Calories: 130
Protein: 19.4g
Carbohydrate: 0g
of which sugars: 0g
Fat: 5.8g
of which saturated: 2g
Fibre: 0g
Sodium: 89mg

Food vs. supplement

A 100g serving supplies roughly two-thirds of the adult iodine RDA and close to a full day’s B12 from one whole food — output that would otherwise mean reaching for both an iodine and a B12 supplement.

Kitchen tip

Pan-fry or bake whole fillets — its firm, flaky texture holds together well and doesn’t need much beyond a squeeze of lemon.

Common myth

"Ordinary white fish has no special nutrients beyond protein." In reality: Morwong is a genuine source of iodine, a nutrient that’s genuinely scarce outside seafood, dairy, and iodised salt, alongside close to a full day’s B12 in a single serve.