What should we do if we doubt whether it is permissible to eat and drink something?

When we ask questions like "Is it a sin to eat something or to drink something?", we usually get the following answer: "Try to keep away from doubtful things." All right; we will keep away from them but we live in such an age that when one buys something, he says, "Allah knows what is in it."

Dear Brother / Sister,

What is essential for things is being halal (permissible). Something becomes haram through definite evidence. If evidence is not definite, it cannot be said that this thing is haram. It is not definitely know that this additive is definitely haram.

A person is regarded as innocent unless he is proved guilty. A product is regarded as legitimate unless it is proved to be haram (forbidden). Therefore, a person and a product are accepted as clean unless they are proved to be harmful and haram. 

Accordingly, it is permissible to eat a product unless it is proved to be haram and if it is written on the package that it does not contain lard.

Questions on Islam