( Fat ( ( is ( ( ( ( also ( ( needed ( in ( the diet ) ) ) ( to ( supply ( ( ( essential ( fatty acids ) ) , ) ( substances ( essential ( for growth ) ) ) ) ) ) ) ) ( but not ) ) ( produced ( by ( the body ) ) ) ) itself ) ) . ) )
(ROOT (S (NP (NNP Fat)) (VP (VBZ is) (VP (VP (ADVP (RB also)) (VBN needed) (PP (IN in) (NP (DT the) (NN diet))) (S (VP (TO to) (VP (VB supply) (NP (NP (JJ essential) (NN fatty) (NNS acids)) (, ,) (NP (NP (NNS substances)) (ADJP (JJ essential) (PP (IN for) (NP (NN growth)))))))))) (CONJP (CC but) (RB not)) (VP (VBN produced) (PP (IN by) (NP (DT the) (NN body)))) (NP (PRP itself)))) (. .)))
Fat is also needed in the diet to supply essential fatty acids, substances essential for growth but not produced by the body itself.
(ROOT (S (NP (DT A) (JJ healthy) (NN diet)) (VP (VBZ is) (ADJP (JJ important)) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ supplies) (NP (NP (NP (DT the) (NN body) (POS 's)) (NNS needs)) (PP (IN for) (NP (NN growth) (CC and) (NN energy)))))))) (. .)))