British Grass Fed LambBritish Grass Fed Lamb with Mint, Pomegranate, Mulberry, Broccoli & Fennel It has been found that grass fed lambs are leaner (have less body fat) and that the concentration of omega 3 fatty acids within the meat is increased, resulting in an increased ratio of omega 3 to omega 6 fatty acids. Lamb is a nutrient dense, highly digestible protein source. It is also a good source of vitamin B12 and iron which are required to help keep nerve and blood cells