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Title: | Does long-term creatine supplementation impair kidney function in resistance-trained individuals consuming a high-protein diet? |
Authors: | LUGARESI, Rebeca; LEME, Marco; PAINELLI, Vitor de Salles; MURAI, Igor Hisashi; ROSCHEL, Hamilton; SAPIENZA, Marcelo Tatit; LANCHA JUNIOR, Antonio Herbert; GUALANO, Bruno |
Citation: | JOURNAL OF THE INTERNATIONAL SOCIETY OF SPORTS NUTRITION, v.10, article ID 26, 6p, 2013 |
Abstract: | Background: The aim of this study was to determine the effects of creatine supplementation on kidney function in resistance-trained individuals ingesting a high-protein diet. Methods: A randomized, double-blind, placebo-controlled trial was performed. The participants were randomly allocated to receive either creatine (20 g/d for 5 d followed by 5 g/d throughout the trial) or placebo for 12 weeks. All of the participants were engaged in resistance training and consumed a high-protein diet (i.e., >= 1.2 g/Kg/d). Subjects were assessed at baseline (Pre) and after 12 weeks (Post). Glomerular filtration rate was measured by Cr-51-EDTA clearance. Additionally, blood samples and a 24-h urine collection were obtained for other kidney function assessments. Results: No significant differences were observed for Cr-51-EDTA clearance throughout the trial (Creatine: Pre 101.42 +/- 13.11, Post 108.78 +/- 14.41 mL/min/1.73m(2); Placebo: Pre 103.29 +/- 17.64, Post 106.68 +/- 16.05 mL/min/1.73m(2); group x time interaction: F = 0.21, p = 0.64). Creatinine clearance, serum and urinary urea, electrolytes, proteinuria, and albuminuria remained virtually unchanged. Conclusions: A 12-week creatine supplementation protocol did not affect kidney function in resistance-trained healthy individuals consuming a high-protein diet; thus reinforcing the safety of this dietary supplement. |
Appears in Collections: | Artigos e Materiais de Revistas Científicas - HC/ICESP Artigos e Materiais de Revistas Científicas - HC/InRad Artigos e Materiais de Revistas Científicas - LIM/43 |
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art_SAPIENZA_Does_long_term_creatine_supplementation_impair_kidney_function_2013.PDF | publishedVersion (English) | 501.04 kB | Adobe PDF | View/Open |
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