Vraag & antwoord
Versnelt melk omzetting van creatine naar creatinine?
Creatine Monohydraat 600g
Creatine Monohydraat 600g
1
Anoniem
Ik las ergens dat melk de creatine vertraagt en dan omzet naar creatinine, en dus niet goed is, of klopt dit niet?
Alvast bedankt
Powersupplements
Het is ons niet bekend dat melk de creatine dusdanig lang in de maag houdt, dat het een effect van betekenis heeft op de omzetting van creatine naar creatinine. Ik ken geen studies waaruit een dergelijk effect naar voren is gekomen.
Onderstaande studie laat daarentegen zien dat voedsel (eiwitrijk of vezelrijk) dat de opname van creatine vertraagt geen effect heeft of zelfs een heel licht positief effect ten opzichte van creatine welke in water is opgelost:
Kinetics of creatine ingested as a food ingredient.
Deldicque L, D้combaz J, Zbinden Foncea H, Vuichoud J, Poortmans JR, Francaux M.
Institut d'Education physique et de R้adaptation, Facult้ de M้decine, Universit้ catholique de Louvain, Place Pierre de Coubertin 1, 1348, Louvain-la-Neuve, Belgium.
Abstract
The aim of the present study was to test if the consumption of creatine incorporated in food bars modifies creatine plasma kinetics, erythrocyte retention and loss in urine and in feces when compared with its consumption in the form of an aqueous solution (AS). Seventeen healthy young men ingested 2 g creatine either in the form of AS, or incorporated in a protein (PP)- or in a beta-glucan (BG)-rich food bar. Kinetics of plasma creatine was measured for 8-h duration and urinary excretion for 24 h. Then, the subjects received the same treatment thrice a day for 1 week at the end of which creatine contents were determined in erythrocytes and in feces (n = 4 for feces). The three crossover treatments were interspaced by a 40 +/- 1.2-day wash-out. Absorption of creatine was slowed down by 8-fold in the presence of BG (P < 0.001) and by 4-fold with PP (P < 0.001) whereas the velocity rate constant of elimination and the area under the curve were not modified. Urinary loss of creatine in the first 24 h following ingestion was 15 +/- 1.9% in AS and 14 +/- 2.2% in PP conditions (NS), whereas it was only 8 +/- 1.2% with BG (P = 0.004). Increase in creatine concentration in erythrocyte was similar in whatever form the creatine was ingested. Creatine seems to be totally absorbed since no creatine or creatinine was detectable in feces. No side effects were reported. In conclusion, ingestion of creatine combined with BG facilitates its retention by slowing down its absorption rate and reducing its urinary excretion.
http://www.ncbi.nlm.nih.gov/pubmed?term=17851680
Onderstaande studie laat daarentegen zien dat voedsel (eiwitrijk of vezelrijk) dat de opname van creatine vertraagt geen effect heeft of zelfs een heel licht positief effect ten opzichte van creatine welke in water is opgelost:
Kinetics of creatine ingested as a food ingredient.
Deldicque L, D้combaz J, Zbinden Foncea H, Vuichoud J, Poortmans JR, Francaux M.
Institut d'Education physique et de R้adaptation, Facult้ de M้decine, Universit้ catholique de Louvain, Place Pierre de Coubertin 1, 1348, Louvain-la-Neuve, Belgium.
Abstract
The aim of the present study was to test if the consumption of creatine incorporated in food bars modifies creatine plasma kinetics, erythrocyte retention and loss in urine and in feces when compared with its consumption in the form of an aqueous solution (AS). Seventeen healthy young men ingested 2 g creatine either in the form of AS, or incorporated in a protein (PP)- or in a beta-glucan (BG)-rich food bar. Kinetics of plasma creatine was measured for 8-h duration and urinary excretion for 24 h. Then, the subjects received the same treatment thrice a day for 1 week at the end of which creatine contents were determined in erythrocytes and in feces (n = 4 for feces). The three crossover treatments were interspaced by a 40 +/- 1.2-day wash-out. Absorption of creatine was slowed down by 8-fold in the presence of BG (P < 0.001) and by 4-fold with PP (P < 0.001) whereas the velocity rate constant of elimination and the area under the curve were not modified. Urinary loss of creatine in the first 24 h following ingestion was 15 +/- 1.9% in AS and 14 +/- 2.2% in PP conditions (NS), whereas it was only 8 +/- 1.2% with BG (P = 0.004). Increase in creatine concentration in erythrocyte was similar in whatever form the creatine was ingested. Creatine seems to be totally absorbed since no creatine or creatinine was detectable in feces. No side effects were reported. In conclusion, ingestion of creatine combined with BG facilitates its retention by slowing down its absorption rate and reducing its urinary excretion.
http://www.ncbi.nlm.nih.gov/pubmed?term=17851680
Natrium/sodium
Houdbaarheidsdatum?
Vrouwenvariant?
