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Table 5 Selected parameters of complete blood count and the level of total antioxidant capacity before and after supplementation with L-theanine (LTE) or placebo (Pla)

From: The effect of L-theanine supplementation on the immune system of athletes exposed to strenuous physical exercise

Parameters Before supplementation After supplementation ANOVA
Pre-Exercise x ± SD Post-Exercise x ± SD Post-Recovery x ± SD Pre-Exercise x ± SD Post-Exercise x ± SD Post-Recovery x ± SD Exercise LTE Exercise x LTE
WBC [109/L] LTE 6.81 ± 1.47 11.16 ± 1.52* 6.53 ± 1.04† 6.25 ± 1.17 11.12 ± 1.96* 6.46 ± 1.51 < 0.0001 0.2236 0.7378
Pla 5.98 ± 1.27 10.1 ± 1.56* 5.75 ± 0.75 6.03 ± 1.13 10.83 ± 1.91* 6.0 ± 0.74
Granulocytes [%] LTE 46.0 ± 10.81 47.6 ± 3.85 52.6 ± 5.53 46.4 ± 3.69 41.9 ± 5.37 51.3 ± 6.25 < 0.0001 0.8803 0.4637
Pla 48.9 ± 5.68 47.8 ± 6.22 48.8 ± 5.44 45.5 ± 3.58 43.4 ± 7.35 49.9 ± 6.04
Lymphocytes [%] LTE 42.73 ± 7.85 44.59 ± 4.21 38.44 ± 6.04 43.48 ± 3.08 48.36 ± 4.93 38.79 ± 5.35 < 0.0001 0.5098 0.5920
Pla 43.19 ± 5.32 45.13 ± 6.59 42.83 ± 6.02 44.98 ± 3.39 47.62 ± 6.99 40.17 ± 6.19
TAC (mmol/l) LTE 2.36 ± 0.38 1.78 ± 0.40* 2.11 ± 0.55 2.22 ± 0.44 1.80 ± 0.35 2.43 ± 0.41 < 0.0001 0.2035 0.5617
Pla 2.49 ± 0.22 1.65 ± 0.28* 2.18 ± 0.42 1.87 ± 0.46 1.69 ± 0.24 2.39 ± 0.46
  1. WBC White blood cells; TAC Total Antioxidant Capacity
  2. *p < 0.05 – compared to Pre-Exercise value
  3. p < 0.05 – compared to Post-Exercise value