Skip to main content

Table 4 Sulfatoxymelatonin (aMT6s/crea), tryptophan (trp), and kynurenine (kyn) concentrations under office light (OL) and bright light (BL) exposure

From: Impact of a single, short morning bright light exposure on tryptophan pathways and visuo- and sensorimotor performance: a crossover study

Time

aMT6s/crea [ng/mg]

trp [μmol/L]

kyn [μmol/L]

OL exposure

BL exposure

OL exposure

BL exposure

OL exposure

BL exposure

Morning urine

20.8 (12.2–29.4)

14.0 (8.6–19.4)

n.a.

n.a.

7:15 a.m.

17.8 (10.9–24.7)

14.6 (8.7–20.5)

82.0 (77.2–86.9)

75.6 (70.3–81.0)

3.2 (2.8–3.7)

2.8 (2.5–3.0)

9:15 a.m.

12.1 (8.0–16.1)#

12.2 (7.3–17.1)#,*

69.5 (65.0–74.1)*

69.3 (64.9–73.7)

2.8 (2.6–3.0)

2.7 (2.4–2.9)

11:15 a.m.

8.4 (2.1–14.7)#,*,**

3.9 (2.4–5.4) #,*,**

66.5 (62.5–70.1)*

69.5 (65.9–73.1)

2.7 (2.4–3.0)

2.6 (2.3–2.8)

  1. Values represent mean values and 95% confidence intervals
  2. #p < 0.05 as compared to morning urine
  3. *p < 0.05 as compared to 7:15 a.m.
  4. **p < 0.05 as compared to 9:15 a.m.