The Giurgea Criteria: What Qualifies as a True Nootropic?
Walk into any supplement store these days and you’ll find dozens of products labeled “nootropic” — from caffeine pills to mushroom extracts to proprietary blends with names that sound like spacecraft. But here’s the uncomfortable truth: most of them wouldn’t pass the original test. The giurgea nootropic criteria, established over sixty years ago, set a…
