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Copyright ©The Author(s) 2021.
World J Meta-Anal. Apr 28, 2021; 9(2): 153-163
Published online Apr 28, 2021. doi: 10.13105/wjma.v9.i2.153
Table 2 Plasma amino acid values (μmol/L) during childhood
Amino acid
6 mo 50th (10th-90th) quantile value
2 yr 50th (10th-90th) quantile value
6 yr 50th (10th-90th) quantile value
16 yr 50th (10th-90th) quantile value
Alanine248 (182-396)229 (173-349)234 (182-319)370 (240-482)
Arginine72 (43-120)70 (46-90)76 (50-99)96 (68-128)
Asparagine41 (31-56)38 (29-56)42 (31-67)55 (37-81)
Aspartic acid7 (4-18)6 (3-8)4 (3-6)4 (2-5)
Citrulline26 (14-32)28 (17-35)30 (23-37)30 (23-39)
Cystine38 (21-53)41 (27-52)44 (33-54)48 (36-61)
Glutamic acid56 (31-113)52 (25-81)39 (13-65)25 (11-46)
Glutamine583 (474-737)580 (473-692)604 (493-724)680 (551-797)
Glycine207 (138-276)207 (138-276)213 (144-282)252 (183-322)
Histidine76 (61-91)76 (61-91)78 (63-93)92 (77-107)
Isoleucine53 (39-76)55 (4-78)54 (40-69)60 (47-74)
Leucine115 (77-153)111 (79-147)110 (86-136)128 (101-159)
Lysine129 (87-171)130 (88-172)139 (96-181)200 (157-242)
Methionine55 (25-103)19 (13-22)20 (14-25)26 (20-34)
Ornithine53 (38-78)35 (24-60)37 (25-50)47 (37-62)
Phenylalanine52 (38-78)49 (39-65)49 (40-61)57 (47-74)
Proline93 (151-265)128 (93-220)127 (93-201)184 (113-271)
Serine126 (98-160)121 (97-154)118 (96-155)130 (101-177)
Taurine59 (39-111)55 (39-80)53 (41-69)53 (41-66)
Threonine102 (61-162)91 (61-115)94 (65-125)131 (104-188)
Tryptophan54 (34-73)54 (35-73)56 (37-76)74 (54-87)
Tyrosine60 (43-108)55 (40-77)55 (39-65)65 (46-87)
Valine196 (135-260)199 (147-255)199 (165-234)233 (178-275)