Pick two or three products and the engine ranks them on evidence tier, dose match, trust, safety, and cost per verified effective dose, using the same merit math on every axis, for every product.
Creatine Monohydrate · 5g ranks first with a Keep verdict on Tier A (strong) evidence, the best clinical benefit per euro at €0.09/day and the cleanest trust and safety profile in the set, roughly 46× the benefit per euro of Nicotinamide Riboside · 300mg.
Ranking is computed from intrinsic grade and value only: verdict, evidence tier, trust, dose verification, and cost per effective dose. Who pays, or doesn't, never enters the math.