Beef is actually not bad for you. However it can be if that's all you eat, but if you have it along with vegetables and maybe a little bit of non-refined or whole-grain grain-product, it's perfectly healthy for you.
Beef is not bad for your system in small amounts. You will also not want to eat beef that is not properly cooked.
Maybe not. It depends what made the beef "bad".
Not necessarily, browning of beef while in the freezer or fridge just means that it is not as fresh as it could be. If it has a green tinge to it you know it is now bad.
If beef taste like fish then throw it out.
Yes, it is. You should not eat bad beef because it causes potentially fatal food-borne illness.
You should use beef stock two weeks after opening.
look at the label
You can tell ground beef is bad if it has a sour smell, a slimy texture, or a grayish-brown color. It may also have a strange or off taste. It's important to always check the expiration date and store ground beef properly to prevent it from going bad.
The exact amount of time varies on the environment it's left in, though the first signs of bad beef is an odd discoloration and a rancid smell.
Paul Mcartney
It will have a greenish tint to it. And it will be a little slimy and have a bad smell
Oprah Winfrey