However, skeptics point to a lack of medical studies to back up the health claims behind the aroma-therapy, and note that the oils from some plant can actually be harmful, causing buns or even miscarriages

skeptics point to a lack of medical studies to back up the health claims behind the aroma-therapy,

이 부분 해석을 못하겠어요 ... 어디서 끊어야 될지.... ;; 동사가 claims 라는건 알겠는데 뒷부분도 해석이 뒤숭숭....
문장성분이랑 해석좀;; ^^;; 부탁드려요.