Mutton
Food · Protein · Food, Typed Supps
Almost everything that separates one mutton cut from another is fat, not meat.
Stage by stage
- Intake (Chewing and cooking): Long moist cooking converts the tough collagen of older sheep meat into gelatin.
- Digestion (Protein broken down): Acid and enzymes denature and cleave muscle protein into peptides.
- Absorption (Heme iron and amino acids): Heme iron, zinc and B12 are absorbed alongside amino acids from the muscle protein.
- Use (Repair and storage): Amino acids feed muscle protein synthesis; the fat fraction is oxidised or stored.
Time to effect
- Hours: Amino acids from a mutton meal reach the bloodstream within one to two hours and stay elevated for several more.
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
40 on the satiety index, where white bread is 100 — low. Modelled from the Holt et al. (1995) measurements.
Environmental footprint
39.7 kg CO2e and 1803 litres of freshwater per kg, matched to "Lamb & mutton" 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: 603
- Protein: 8.2g
- Carbohydrate: 0g
- of which sugars: 0g
- Fat: 64.4g
- of which saturated: 28.6g
- Fibre: 0g
- Sodium: 33mg
Food vs. supplement
Mutton is a whole-food source of the nutrients people most often supplement in isolation: heme iron, B12 and zinc. Heme iron is absorbed by a different route than the ferrous salts in iron tablets, which is why it causes less gut upset at equivalent uptake, and a meat meal also improves absorption of the non-heme iron eaten alongside it. Nothing in a capsule reproduces that interaction.
Kitchen tip
Shoulder cuts want two to three hours of low moist heat — casseroled or curried — because that is what turns older sheep collagen into gelatin. Leg cuts are lean enough to roast, but they dry out at the same temperatures that suit lamb, so go lower and slower. Trimming the visible fat before cooking, rather than after, removes the bulk of the energy.
Common myth
“Mutton is just fatty, gamey lamb.” In reality: The difference between mutton and lamb is the animal's age, which mostly shows up as tougher connective tissue and a stronger flavour. Fat content is set by the trim, not the age: a trimmed mutton leg is a lean cut, and a fatty lamb cut is a fatty cut.
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