Table S1.

Study participants’ demographic and experimental parameters

Demographic	Control group	SD52/REC14 group	P value
n	20	14	NA
Age (y)	26.2 ± 1.1	27.7 ± 5.4	0.4
BMI (kg/m2)	22.5 ± 3.6	24.5 ± 3.5	0.9
Chronic caffeine consumption (in 0.15 L cups of coffee)	1.3 ± 1.4	1.2 ± 1.7	0.87
Clock time of scanning	11:38 AM	11:41 AM	0.87
Injected radioactivity (MBq)	260.1 ± 6.2	277.1 ± 6.9	<0.001
Injected mass (nmol)	4.5 ± 2.2	3.1 ± 1.8	0.06

Values are given as mean ± SD. Unpaired t test. BMI, body mass index; NA, not applicable.