芦荟外用没问题，内服还是要小心。

https://www.allure.com/story/aloe-vera-skin-care-products-proposition-65-california

Here's why: Non-decolorized, whole-leaf aloe extract contains a chemical called aloin, which has been shown to cause cancer in rats. There's one major caveat here, though: The study found aloin causes cancer only when ingested. In other words, the worrisome kind of aloe included on the list isn’t actually relevant to your favorite beauty products. To be totally clear, there is no evidence that aloe applied to the skin can causes cancer.