Question
Does L-arginine work?
In context of L-arginine·Mixed evidence58/100
Evidence strength for L-arginine is scored 54/100 in our rubric, separate from safety and marketing gap. Some endothelial studies exist; effect sizes and formulations vary widely.
Full ingredient file
This page is a short answer. Mechanisms, dosing notes, sources, and the rest of the verdict live on the hub for L-arginine.
Open L-arginine verdictOther questions on L-arginine
A few more focused pages for the same ingredient (we keep lists short on purpose).