Table 3 Kidney function parameters before (Pre) and after 12 weeks (Post) of either creatine or placebo supplementation in resistance-trained individuals consuming a high-protein diet
Creatine (n = 12) | Placebo (n = 14) | ||||
|---|---|---|---|---|---|
Variable | Pre | Post | Pre | Post | P (group x time interaction) |
Albuminuria (mg/24 h) | 19 (38) | 15 (28) | 8 (7) | 4 (2) | 0.99 |
Proteinuria (g/24 h) | 0.14 (0.11) | 0.14 (0.10) | 0.10 (0.05) | 0.10 (0.07) | 0.83 |
Urinary potassium (mEq/24 h) | 65 (24) | 59 (22) | 68 (24) | 65 (19) | 0.86 |
Urinary sodium (mEq/24 h) | 231 (56) | 226 (91) | 195 (65) | 191 (52) | 0.99 |
Serum potassium (mEq/L) | 4 (0.3) | 4 (0.4) | 5 (0.4) | 4 (0.4) | 0.26 |
Serum sodium (mEq/L) | 141 (3) | 141 (2) | 142 (3) | 141 (4) | 0.53 |
Serum creatinine (mg/dL) | 1.1 (0.1) | 1.2 (0.2) | 1.0 (0.1) | 1.1 (0.1) | 0.30 |
Serum urea (mg/dL) | 41.7 (10.7) | 39.2 (11.7) | 33.3 (6.7) | 33.4 (7.2) | 0.63 |