Complex sentence: Meat extracts have largely been supplanted by bouillon cubes and yeast extract, and some brands of meat extract such as Oxo and Bovril now contain yeast extract as well as meat extract.
Split into simpler sentences: Meat extracts have largely been supplanted by bouillon cubes and yeast extract. Some brands of meat extract, such as Oxo and Bovril, now contain yeast extract as well as meat extract.