Lamb

Lamb is the meat from sheep typically under one year of age, sourced globally with significant production in New Zealand, Australia, and the Middle East. It is commonly prepared through roasting, braising, grilling, or stewing, and appears in cuisines from Mediterranean to South Asian cooking. Lamb is sold as cuts including chops, leg, shoulder, and ground forms.

Lamb is a complete protein source containing all nine essential amino acids, providing approximately 25–26 g protein per 100 g of lean cooked meat. It contains significant amounts of iron (heme iron, which is more bioavailable than plant-based iron), zinc, selenium, and B vitamins including B12 and niacin. Lamb fat comprises a mixture of saturated and unsaturated fatty acids; grass-fed lamb typically contains higher levels of conjugated linoleic acid (CLA) and omega-3 polyunsaturated fats compared to grain-fed varieties. Digestion of lamb is straightforward; the protein and fat are broken down by standard gastric and pancreatic enzymes without unique metabolic demands in people without underlying GI disorders.

Iron and Energy Metabolism

Lamb is a significant source of bioavailable iron, containing approximately 1.6–2.3 mg per 100 g of cooked meat. Heme iron from animal sources is absorbed more efficiently than non-heme iron from plants. Iron is essential for oxygen transport, mitochondrial function, and energy production. Adequate iron intake is particularly relevant for people at higher risk of deficiency, including menstruating individuals and pregnant persons. Lamb also provides vitamin B12, which is synthesized only by microorganisms and is not naturally present in plant foods, making animal-derived foods like lamb an important dietary source of B12 for those whose diets include meat.

Saturated Fat and Portion Considerations

Lamb meat contains approximately 15–20 g total fat per 100 g cooked meat (varies by cut), with saturated fat comprising roughly 7–8 g. High intakes of saturated fat are associated with elevated LDL cholesterol in observational and intervention studies. The cardiovascular impact of red meat consumption remains complex; some evidence suggests the association between red meat and cardiovascular disease is mediated by processing methods, portion size, and overall dietary pattern rather than the meat itself. Health organizations including the American Heart Association recommend limiting red meat intake and choosing lean cuts when consumed. Portion guidance typically aligns with 3–3.5 oz (85–100 g) servings, 2–3 times per week for consumers without specific medical contraindications. People with familial hypercholesterolemia, established cardiovascular disease, or those following physician-directed dietary restrictions should discuss red meat intake with their healthcare provider.