Halakhah specifically encourages us to separate meat and dairy products and prohibits us from eating them together.
Some foods, neither meat nor dairy in origin, are known as pareve and government standards may differ from Rabbinical definitions.
The Torah says which animals are kosher and may be eaten (after an appropriate process) and which animals are not.
The Torah requires specific methods of slaughter, inspection, and preparation before acceptable animals may be eaten.
What alcohol requires a hechsher or kosher supervision? It largely depends on the process by which they are made and the ingredients used.