I like to think that I’m not an easily influenced person who chases every trend. But what can I say? It can be hard to resist the power of the almighty algorithm. So let me confess that I find myself in the throes of the world’s most basic midlife crisis. I have not found God (religion is back in fashion, apparently), but I have found creatine.

It’s possible that you too have discovered creatine: the supplement is all the rage right now. For those who haven’t started mainlining it every morning, a quick primer. Creatine is a fitness supplement that used to be the........

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