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Table 2 Values of plasma amino acids (μmol/L) at −10, 30, 60, 90 and 120 minutes post-supplementation

From: Acute L-Arginine supplementation does not increase nitric oxide production in healthy subjects

Amino acid L-Arg (n =9) Pla (n =8)
  −10 30 60 90 120 −10 30 60 90 120
L-citrulline 57.4 125.2 75.2 89.7 82.2 56.2 76.9 66.2 75.9 79.8
  ±31.2 ±136.3 ±45.4 ±92.9 ±78.0 ±28.1 ±26.3 ±43.0 ±53.9 ±63.0
L-arginine 151.7 209.9 192.3 204.9 224.7 146.2 123.3 133.4 138.8 150.8
  ±33.9 ±39.1*** † ±51.3* ±55.1* ±57.8* a ±44.3 ±44.6 ±36.0 ±42.2 ±34.8
L-ornithine 127.5 153.2 154.0 143.1 147.0 93.4 119.8 101.1 105.5 110.4
  ±87.1 ±84.9 ±65.7 ±55.9 ±65.4 ±23.7 ±88.8 ±49.6 ±59.9 ±59.2
  1. The values are mean ± standard deviation. The symbols ***(P < 0.001), **(P < 0.01) and *(P < 0.05) denotes significantly different from placebo at same time point; a denotes significantly different from time −10. L-Arg = L-arginine supplemented group; Pla = Placebo group.