Calories and Nutritions in Lamb

According to USDA, 100 grams of raw, ground lamb contains 242 calories. 

According to USDA, 1kg of raw, ground lamb contains 2,420 calories. 

According to the USDA, a 3 oz (84g) broiled loin chop contains 180 calories, a boneless loin top loin chop broiled contains 160 calories, a braised shoulder arm chop contains 280 calories, a braised shoulder blade chop contains 280 calories, and a broiled loin chop contains 250 calories.

The lamb health benefits are listed below:

• High Nutritional Impact: A study titled Fresh Beef and Lamb Consumption in Relation to Nutrient Intakes and Markers of Nutrition and Health Status among the Population Aged 5–90 Years in Ireland spearheaded by Laura Kehoe examined the role of fresh beef and lamb in the Irish diet (ages 5–90) using data from three national surveys. Results showed 68–84% of the population consumed these meats, providing key nutrients like protein, vitamins D and B12, niacin, iron, and zinc. Higher consumption was linked to more protein, niacin, and essential vitamins but also total fat. No increased risk of cardio-metabolic diseases or changes in vitamin D, B12, or iron status were found, even in older adults and women of childbearing age.
• Complete Protein: Lamb is an excellent source of protein according to a 2016 study on “The Value of lamb meat in human nutrition” led by Krishtafovich, V. offering 25-30 grams per 100 grams, depending on the cut. Classified as a "complete protein," lamb contains all essential amino acids, allowing the body to utilize the protein more efficiently than plant-based, incomplete proteins. High-quality protein from lamb supports lean muscle mass development, cell growth and repair, and promotes satiety.
• Excellent Source of Omega 3: Lamb is an excellent dietary source of omega-3s, which are known for their anti-inflammatory properties and role in supporting overall health. Incorporating lamb into the diet can help balance omega-3 and omega-6 intake, a crucial factor for reducing inflammation and promoting well-being. A study conducted by Eric N. Ponnampalam and colleagues, titled Health Beneficial Long-Chain Omega-3 Fatty Acid Levels in Australian Lamb Managed under Extensive Finishing Systems, investigated the omega-3 content in lamb across various production regions of Australia. The study, which analyzed 5,726 lambs over three years across 87 slaughter groups, found that lamb, particularly when raised on pasture, is a significant source of omega-3 fatty acids. 
• Rich Source of Creatine: Red meat, particularly lamb, serves as a significant dietary source of creatine, providing approximately 300-500 mg per 100 grams. Creatine is widely recognized for enhancing muscular endurance, strength, and potentially increasing muscle mass. Creatine supplementation is popular among athletes and fitness enthusiasts, and creatine also occurs naturally in various foods, with lamb being one of the primary sources as studied by R.W. Purchas, et. al., on “Concentrations in beef and lamb of taurine, carnosine, coenzyme Q10, and creatine” in 2004.

Some of the potential downsides of eating lamb are listed below:

• Processed Red Meat and Dementia Risk: An increased intake of processed red meat  study has been found to cause early onset of dementia. A study titled "Long-Term Intake of Red Meat in Relation to Dementia Risk and Cognitive Function in U.S. Adults," led by Yuhan Li, Yanping Li, and colleagues and published in Neurology, examined the impact of red meat consumption on dementia risk and cognitive function in 133,771 participants. The findings revealed that increased intake of processed red meat was associated with a higher risk of dementia and cognitive decline.
• Cancer Risk: Meat consumption in the U.S. is rising, and a 2023 study led by Barath Prashanth Sivasubramanian et al., titled "Comprehensive Review of Red Meat Consumption and the Risk of Cancer" links red meat to cancer development. Heme iron in red meat is strongly associated with an increased risk of breast cancer. Red meat consumption also raises the risk of gastric cancer by promoting Helicobacter pylori infections. Compounds like heterocyclic amines and polycyclic aromatic hydrocarbons in red meat may contribute to pancreatic cancer. Cooking red meat at high temperatures increases the risk of colorectal cancer by inducing DNA damage.
• Lamb Meat Consumption and Cardiovascular Risk: Excessive lamb meat consumption has been associated with cardiovascular risk factors. A study titled “The Risk of Excess Lamb Meat (Mutton Meat) Consumption on the Emergence of Ischemic Heart Diseases and Other Related Health Problems in Habitants of North Sinai Governorate” by Mahmoud A.H. Aladawy, M.Sc., et.al., conducted in September 2024, explored the relationship between excessive lamb meat consumption and cardiovascular risk factors (CVR) such as diabetes, hypertension, obesity, and dyslipidemia among 100 patients in North Sinai Governorate. The findings revealed that higher lamb meat consumption was significantly associated with increased cardiovascular risk factors, including elevated blood pressure, LDL cholesterol, glycated hemoglobin, and obesity. 

Yes, lamb can be a healthy choice when eaten in moderation as part of a balanced diet. It's a lean meat rich in iron, protein, and beneficial compounds like creatine, taurine, and glutathione. Some studies suggest negative effects from red meat, but others find little to no impact according to a 2009 study on “Consumption of red or processed meat does not predict risk factors for coronary heart disease; results from a cohort of British adults in 1989 and 1999” led by J J M F Wagemakers, et al, and published in the National Library of Medicine. 

According to the Dietary Guidelines for Americans 2020-2025 (p.96), the recommended intake of meats, poultry, and eggs is 23 ounces per week, based on a 1,600-calorie daily diet, which is equivalent to 3.29 ounces per day or 93 grams (cooked weight) of lamb or red meat per day.

According to the Dietary Guidelines for Americans 2020-2025, page 96, the maximum recommended intake of meats, poultry, and eggs is 33 ounces per week, based on a 3,000-calorie daily diet, which is equivalent to 4.71 ounces per day or approximately 133.6 grams (cooked weight) of lamb or red meat per day. That’s about one portion of 133.6 grams cooked/190 grams raw if eaten every night of the week, or one larger portion of 267 grams cooked/380 grams raw every second day.

The calorie content of lamb varies based on age and fat content, with older lambs generally having higher fat and calorie levels. For example, a 100-gram serving of roasted lamb contains approximately 258 calories, with 57% water, 25.6 grams of protein, and 16.5 grams of fat. Choosing leaner cuts and employing cooking methods that reduce fat can help manage calorie intake.

Lamb has been an important food source for humans for over 10,000 years, originating in Central Asia where sheep were domesticated for meat, wool, and skins. During the Middle Ages, sheep became crucial for providing food, clothing, and other materials. Sheep were introduced to North America by Spanish soldiers in 1519, but lamb didn't become a significant part of the American diet due to cultural and agricultural conflicts. The Cotswold breed, one of the oldest, was brought to England by the Romans over 2,000 years ago and later to the U.S. in 1832.