( ( ( ( ( Protein ( is ( necessary ( for ( tissue repair ) ) ) ) ) , ) so ) ( ( ( a lack ) ( of ( protein ( in ( the diet ) ) ) ) ) ( can ( result ( in ( skin issues ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Protein)) (VP (VBZ is) (ADJP (JJ necessary) (PP (IN for) (NP (NN tissue) (NN repair)))))) (, ,) (IN so) (S (NP (NP (DT a) (NN lack)) (PP (IN of) (NP (NP (NN protein)) (PP (IN in) (NP (DT the) (NN diet)))))) (VP (MD can) (VP (VB result) (PP (IN in) (NP (NN skin) (NNS issues)))))) (. .)))
Protein is necessary for tissue repair, so a lack of protein in the diet can result in skin issues.
(ROOT (S (NP (NNP Protein)) (VP (VBZ is) (NP (NP (DT an) (JJ important) (NN part)) (PP (IN of) (NP (DT a) (JJ healthy) (NN diet)))) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN needed) (S (VP (TO to) (VP (VB repair) (NP (NN tissue)))))))))) (. .)))