Abstaining from doubtful things

My mother had gotten a pancake mix from the market. I asked the company about its ingredients, they said they had used animal derived products in it (the product came from the US). I'm not sure what kind of animal products are in there. I told my mother to stop using it because it is hughly suspicious since it could be haram. Now my mother always scolds me that I should not be so suspicious of haram things and she refuses to stop using it because she says I'm exaggerating things. What should i do?