Is there a website I could use to compare two products?

I had an allergic reaction to 2 different things, I have never been told about these allergies even with allergy test. I was looking for a website for

I had an allergic reaction to 2 different things, I have never been told about these allergies even with allergy test. I was looking for a website for me to past the ingredients or the title and see what was common or similar for me to be allergic to. One of these products is a drink and the other is toothpaste. I know it's crazy but I've had an allergic reaction to both and I was looking to see if something linked them together.

or:I had an allergic reaction to 2 different things, I have never been told about these allergies even with allergy test. I was looking for a website for me to past the ingredients or the title and see what was common or similar for me to be allergic to. One of these products is a drink and the other is toothpaste. I know it's crazy but I've had an allergic reaction to both and I was looking to see if something linked them together.

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