The principle ruling concerning any kind of matter is that of permissibility and purity (That is, they are to be considered permissible and pure unless proven otherwise).
If someone, therefore, claims that an object is impure, or haram, then the burden of proof is upon him to bring forth some evidence for the impurity of that object.
If he does, his conclusion will be followed.
If he is not able to bring forth such proof or if he does not present an acceptable proof, then our judgment will be according to the original principle, and the original principle is, that it is free of any impurity.
This applies to all matters and all foods. Unless they are explicitly forbidden to us, either via the Speech of Allah or the Sunnah of His Messenger ﷺ, the product/food/liquid/material is permissable for us to eat/drink/taste/use. … More HARAM WATER – ISTIHRAM & ISTIHLAL – THE LOCAL SHAIKH MADE PEPSI HARAM – HOW DO WE KNOW IF SOMETHING IS PERMISSIBLE TO USE OR EAT