Grass fed beef has the right Omega 3 fatty acids in comparison to grain fed cattle.

Gary Fettke No Fructose's photo.

Feed lot cattle are fed grain and that exposes the stock to a different mix of food. Guess what? They end up fatter and the fatty acid profile is more inflammatory.

This 2006 paper confirms the lower amount of good Omega 3 fatty acids in grain fed cattle that have been fattened up for market.