Received caffeine citrate

P value•

Yes

No

Mean

SD

Mean

SD

Urea (D2)

19.18

7.53

27.92

8.45

<0.001

Creat (D2)

0.81

0.30

1.08

0.24

<0.001

Urea (D7)

11.54

3.69

20.66

8.01

<0.001

Creat (D7)

0.53

0.19

0.85

0.26

<0.001