From: Effects of tryptophan-rich breakfast and light exposure during the daytime on melatonin secretion at night
Group
Number of subjects
DLMO*1
Day 1
Day 4
Day 1–Day 4 (min)
Poor*Dim
8
21:53 (54)
22:12 (58)
−19 (13)
Rich*Dim
6
21:30 (60)
22:36 (47)
−66 (14)
Poor*Bright
7
21:23 (64)
19:57 (75)
86 (32)
Rich*Bright
21:38 (60)
20:07 (52)
90 (53)