Four Sigmatic has made a bit of a splash in 2020, especially after it was endorsed by Tim Ferris and a lot of different Instagram influencers. But are most of their claims just nonsense marketing speak? That’s the question we’d like an answer to, and as of this date, it’s hard to say how effective Four Sigmatic actually is. I mean, is “mushroom coffee” actually turn you into a superhero? It seems doubtful.
Based on our research so far, we do not believe there is that much scientific evidence that Four Sigmatic products are as effective as they claim.
This is probably the best article on the scientific credibility of Four Sigmatic (scroll down a little bit), as it lists all the credible papers that may support Four Sigmatic’s claims. But that’s not conclusive evidence by itself. Have a read through it and let us know what you think!
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