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Table 2 MED after daily consumption of 30 g chocolate for 6, 9 and 12 weeks and after 3-week washout

From: Chocolate flavanols and skin photoprotection: a parallel, double-blind, randomized clinical trial

  High-flavanol chocolate (n = 33) Low-flavanol chocolate (n = 41) Pvalue of changes between treatments
MED (J/cm2)    
Baseline 0.56 ± 0.14 0.61 ± 0.17 -
Week 6 0.59 ± 0.17 0.61 ± 0.15 0.36
Week 9 0.58 ± 0.15 0.63 ± 0.18 0.86
Week 12 0.58 ± 0.14 0.62 ± 0.18 0.70
P value (Week 6 vs. Baseline) 0.24 0.96  
P value (Week 9 vs. Baseline) 0.29 0.36  
P value (Week 12 vs. Baseline) 0.20 0.39  
MED Washout period    
Week 15 0.56 ± 0.14 0.64 ± 0.18 0.21
P value (Week 15 vs.Week 12) 0.22 0.53  
  1. Values represent means ± SD.