Ground beef is made from a variety of cuts of beef. I recommend opting for leaner cuts like sirloin, especially if you’re choosing not to go with grass-fed; “lean” in this case refers to a cut that has more skeletal muscle and less fat. Sirloin is 90-95% lean, round is 85-89% lean, and chuck is 78-84% lean.
Grass-fed chuck beef is a great source of protein and healthy fat. When you opt for grass-fed, you’re getting more of the vitamins and minerals you need to function at your best; perhaps most notably, grass-fed beef is high in the B vitamins, including B12. Grass-fed beef fat contains approximately four times the amount of omega-3 fatty acids than grain-fed, so ratio with omega-6 fatty acids is about 1:3.
Finding a reasonably-priced grass-fed meat producer can be tough. I recommend U.S. Wellness Meats Beef!