( ( B 12 ) ( ( Helps ( in ( ( the production ) ( of ( ( ( ( ( ( ( ( red ( blood cells ) ) , ) ( bone marrow ) ) , ) ( ( the absorption ) ( of ( amino acids ) ) ) ) , ) and ) ( ( the ( efficient functioning ) ) ( of ( ( ( the ( bodies digestive ) ) and ) ( central ( nervous systems ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP B) (CD 12)) (VP (VBZ Helps) (PP (IN in) (NP (NP (DT the) (NN production)) (PP (IN of) (NP (NP (JJ red) (NN blood) (NNS cells)) (, ,) (NP (NN bone) (NN marrow)) (, ,) (NP (NP (DT the) (NN absorption)) (PP (IN of) (NP (JJ amino) (NNS acids)))) (, ,) (CC and) (NP (NP (DT the) (JJ efficient) (VBG functioning)) (PP (IN of) (NP (NP (DT the) (NNS bodies) (NN digestive)) (CC and) (NP (JJ central) (JJ nervous) (NNS systems)))))))))) (. .)))
B 12 Helps in the production of red blood cells, bone marrow, the absorption of amino acids, and the efficient functioning of the bodies  digestive and central nervous systems.
(ROOT (S (NP (NP (DT The) (JJ main) (NN function)) (PP (IN of) (NP (DT the) (JJ human) (NN digestive) (NN system)))) (VP (VBZ is) (S (VP (TO to) (VP (VB break) (PRT (RP down)) (NP (NP (NNS foods)) (PP (IN for) (NP (NN absorption)))) (PP (IN into) (NP (DT the) (NN blood))))))) (. .)))