Lamb

Lamb: a nutrient-rich source of protein

Lamb and mutton (Ovis aries; in Hebrew, “כבש”) are among the oldest meats in human culture and a central component of Middle Eastern, Mediterranean and North African cuisines. Nutritionally, lamb is considered one of the highest-quality animal protein sources, with a complete amino acid profile and a high content of essential micronutrients.

100 grams of lamb (roasted leg, meat and fat) contain about 258 calories, 25 grams of protein, 17 grams of fat and zero carbohydrates. In a lean cut with the visible fat removed, the values drop to about 190 calories and 8 grams of fat. Lamb is especially rich in heme iron, zinc, vitamins B12, B3 and B6, selenium and phosphorus.

Research-based health benefits

• Complete, high-quality protein: Lamb provides all nine essential amino acids that the body cannot make on its own. With a high PDCAAS (Protein Digestibility-Corrected Amino Acid Score), it is considered an excellent biological protein, essential for building and repairing muscle tissue, especially among athletes and older adults.

• Highly bioavailable heme iron: Like other red meats, lamb is rich in heme iron, which is absorbed in the digestive tract with an efficiency of 15–35%, compared with non-heme iron from plant sources (only 1–10%). This makes it an important clinical choice for people with iron deficiency, women of childbearing age and endurance runners.

• A high concentration of zinc: 100 grams of lamb contain about 5–6 mg of zinc, about 50–60% of the recommended daily intake for men. Zinc acts as a cofactor for about 300 different enzymes in the body, including those responsible for immune function, DNA synthesis and hormonal balance.

• Vitamin B12 for nervous system function: A medium serving (150 grams) provides the full daily intake of vitamin B12, a nutrient found almost exclusively in animal foods. B12 is essential for producing red blood cells, for the health of the myelin sheaths of nerve cells and for preventing megaloblastic anemia.

• Carnosine, a special antioxidant: Lamb contains a high concentration of carnosine, a dipeptide made from the amino acids histidine and beta-alanine. Carnosine acts as an intracellular antioxidant in muscle, helps buffer the acids produced during intense physical activity, and studies link it to slowing aging processes in muscles.

• Selenium content for thyroid function: Selenium is a trace mineral essential for the synthesis of thyroid hormones (T3, T4) and for the action of the enzyme glutathione peroxidase, the body’s main antioxidant line of defense. A medium serving of lamb provides about 20–30% of the recommended daily intake of selenium.

Downsides and health considerations

• Saturated fat content: Lamb, particularly the fatty cuts (ribs, shoulder), contains a significant amount of saturated fat. High, sustained intake of saturated fat is associated with a rise in LDL cholesterol, a risk factor for atherosclerosis and coronary heart disease. Distinguish between lean cuts (leg, loin) and fatty cuts.

• Processed lamb products and sausages: Processed lamb products (merguez, frozen skewers, lamb sausage) usually contain high amounts of sodium, preservatives and nitrites. The World Health Organization (WHO) classifies processed red meat as a Group 1 carcinogen, and limiting its intake is recommended.

• Purines and uric acid: Lamb is rich in purines — compounds that the body breaks down into uric acid. For people with gout or uric acid kidney stones, limiting lamb (and red meat in general) is medically recommended.

• Environmental impact: Raising sheep produces a relatively high amount of methane (about 24 kg CO₂e per kg of meat), a significant contribution to greenhouse gas emissions. Sustainability considerations are an increasing factor in dietary decisions.

• Allergy and sensitivity: Lamb allergy is relatively rare, but it exists and is sometimes linked to tick bites (alpha-gal syndrome). In addition, people sensitive to sheep’s milk may also react to the muscle proteins of lamb itself.

Principles for choosing well and cooking optimally

Choosing the right cut is critical for balancing nutritional value against fat content. Lean cuts such as leg, loin and shank (osso buco) are better than ribs and neck in terms of saturated fat. Moist cooking (stock, stew) keeps the meat moist and allows tough cuts to cook for a long time until they are as tender as possible. An internal temperature of 63°C (145°F, medium) up to 77°C (170°F, well done) is the safe standard for whole cuts.

Comparison with other meats

Summary

Lamb is a highly nutritious food that offers a rare combination of complete protein, highly available heme iron, zinc, B12 and selenium. It is especially suitable for people with increased nutritional needs — athletes, older adults and people prone to anemia. At the same time, prefer lean cuts, avoid processed products and include it in a balanced, varied diet.