longevity

Your NAD+ Can Go Up 142%. Should You Feel Different?

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checking a NAD+ supplement capsule label

Take a nicotinamide riboside supplement for eight weeks and your blood NAD+ level can climb by as much as 142%. That number is real, measured, and repeated across multiple clinical trials. What’s less clear is whether a higher number on a lab readout means you’ll actually feel, move, or age any differently. This post contains … Read more

Is Bryan Johnson’s Daily Vitamin Enough for His B12 Problem?

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close-up of B12 supplement capsules

In May, biohacker Bryan Johnson announced he’d been diagnosed with autoimmune gastritis — a condition that stops his stomach from doing the two things it needs to do to absorb vitamin B12 normally. That’s a strange twist for someone whose supplement company sells a multivitamin built around, among other things, a very large dose of … Read more