We don't eat that much lamb in the United States, which is a shame, since it's delicious and very healthy.
According to the World's Healthiest Foods website,
"Lamb is seldom mentioned as a significant source of omega-3 fats, but can provide a valuable amount in the diet, at approximately 50% the amount provided by cod fish or tuna on an ounce-for-ounce basis. Lamb can also contain valuable amounts of CLA (conjugated linoleic acid), a cardioprotective fatty acid. Lamb is a very good source of immunity-supportive protein and selenium. It is also a good source of heart-healthy vitamin B12 and niacin; blood sugar-balancing zinc; and energy-producing phosphorus."However, just like with chicken, beef and pork, make sure to buy grass-fed lamb, which is a far superior product than grain-fed. (The lamb from Iceland and New Zealand available at Whole Foods is 100 percent grass-fed.)