Our rankings

Three ranked fields. Every claim on them carries an evidence tier, and a tier of no evidence is printed as plainly as a strong one — including on products we earn a commission from.

• Best for cognitive energy

  The ranked field for energy and focus, graded on what the human evidence actually shows rather than on what the label claims.

• Best NAD+ injections

  Injectable and intranasal NAD+ providers, ranked on published price and on whether that price is the one you keep paying.

• Best nootropics

  Nootropic stacks and single ingredients, with the evidence tier stated on every claim — including the ones graded no evidence.

Some providers on these pages pay us a commission when you start, at no extra cost to you. That affects the ORDER they appear in and never a price, a grade or a published fact. See our disclosure.