tokens: 1 pmol / 10 000 cells per 5 minutes , respectively , at an l-arginine concentration of 300 micromol / L ) nor L-arginine extraction in the forearm ( at 80 minutes , placebo vs active , 1 868 904 +/- 434 962 vs 2 013 910 +/- 770 619 disintegrations per minute ) was affected by cortisol treatment ; ie , that L-arginine uptake is not affected by short - term cortisol treatment .