Braised Steak Onions

Food · Protein · Food, Typed Supps

Most of what is in the tin is sauce and onion, so there is less meat in it than the name suggests.

Stage by stage

Intake (Mouth): The meat is already fork-tender from long cooking inside the sealed can, so chewing does little work.
Stomach (Stomach): Pepsin begins breaking down the beef protein, which is highly digestible after retorting.
Small intestine (Small intestine): Heme iron, zinc and amino acids are absorbed; heme iron uptake is not blocked by phytate or tea tannins.
Muscle and tissue (Muscle): Amino acids are used for repair and maintenance; the accompanying sodium is handled by the kidneys.

Time to effect

Hours: Amino acids reach circulation within 1 to 3 hours; the sodium load is cleared over the following day.

Allergens

None of the fourteen major allergens. Derived from what this food is, not from a product label.

Eating patterns

Fits: Keto, Gluten-free. Depends on the product: Halal, Kosher, Low-FODMAP.

Satiety

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

Environmental footprint

99.5 kg CO2e and 1451 litres of freshwater per kg, matched to "Beef (beef herd)" in Poore & Nemecek (2018), Science 360.

Cost band

Cheap — roughly £1.4 per kg, as a band midpoint rather than a price.

Key nutrients

Protein
Zinc
Sodium

Nutrition per 100g

Calories: 63
Protein: 7.2g
Carbohydrate: 4.5g
of which sugars: 1g
Fat: 1.6g
of which saturated: 0.7g
Fibre: 0.8g
Sodium: 380mg

Food vs. supplement

For iron, canned beef supplies the heme form that no plant food or standard iron tablet matches for absorption efficiency, though the absolute amount in this dilute product is small. It is not a substitute for iron supplementation in diagnosed deficiency, and it is not an argument against a supplement — just a reminder that the iron in meat behaves differently from the iron in a pill.

Kitchen tip

Treat the tin as a base rather than a meal: adding frozen vegetables, a tin of drained beans or extra potato raises the protein-to-sodium ratio of the finished plate and stretches the meat further, which is closer to how it was historically used.

Common myth

"Canning destroys the goodness in meat." In reality: Protein, zinc and heme iron survive canning essentially intact. What changes is the added salt, the loss of heat-sensitive B vitamins, and dilution — most of the tin is liquid, so protein per 100g looks low.