Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Shark Liver oil

I purchased this product and nowhere on the box, bottle, or pamphlet does it say what it is made from other than "squalene". I assumed, silly me, that this was squalene derived from olive oil having never heard of any other kind. With some digging I found that this is a fluid extracted from shark livers. As someone who does not support the killing of sharks I would not have bought this product had I known that was the source.That said, I have nothing to say about how this product actually works as I will not be using it--just wanted to provide a little bit more information for those who are interested.