( ( Although ( ( ( the theory ) ( of absorption ) ) ( ( is widely ) ( accepted ( among ( proponents ( of aromatherapy ) ) ) ) ) ) ) ( , ( there ( ( is ( no ( scientific ( evidence ( to ( support it ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Although) (S (NP (NP (DT the) (NN theory)) (PP (IN of) (NP (NN absorption)))) (VP (VBZ is) (ADVP (RB widely)) (VP (VBN accepted) (PP (IN among) (NP (NP (NNS proponents)) (PP (IN of) (NP (NN aromatherapy))))))))) (, ,) (NP (EX there)) (VP (VBZ is) (NP (DT no) (JJ scientific) (NN evidence) (S (VP (TO to) (VP (VB support) (NP (PRP it))))))) (. .)))
Although the theory of absorption is widely accepted among proponents of aromatherapy, there is no scientific evidence to support it.
(ROOT (S (NP (NN Evidence)) (VP (VBZ allows) (S (NP (NNS theories)) (VP (TO to) (VP (VB be) (VP (ADVP (RB widely)) (VBN accepted)))))) (. .)))