Enligt äldre studier slutar kreatin fungera efter 5 till 12 veckor, ja. Jag tror inte man undersökt saken vidare.
Citat:
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a more recent study from our laboratory has shown that the initial rise in TCr content in human vastus lateralis after 2 and 5 weeks of creatine supplementation has disappeared after 12 weeks of continued supplementation. A similar finding has been reported by Volek et al., as the elevation of TCr content of the human vastus lateralis was 22% after the one week loading phase (25 g/day) and was reduced to 10% (n.s.) following 12 weeks of creatine supplementation (5 g/day). Thus, effect sizes after 12 weeks are markedly smaller than after 1–5 weeks, despite continued creatine supplementation. Thus, it seems that at a time point between 5 and 12 weeks, continuous creatine supplementation starts to fail keeping up the TCr in human muscle.
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https://link.springer.com/article/10...:1022439302975