doi:10.1056/NEJMoa2032183 Yabe D, Nakamura J, Kaneto H, et al
The potency comes with important caveats
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Foods like Brazil nuts, fish, eggs, and sunflower seeds are rich in selenium
While the instructions arent that complicated (you just take one capsule with water), its still always helpful to include them for anyone new to NMN, or just supplements in general
Many companies use "window dressing"adding a tiny amount of an ingredient just so they can put it on the label, even if that amount isn't enough to be effective