Yes, but that doesn't mean the form found in supplements is the same. Also, "the dose makes the poison."

In the Nineties, Wired and Mondo 2000 were good for piquing interest in nootropics but as they didn't seem to catch on (aside from off-label use of pharmaceuticals like Adderall), I put them in the same mental bin as all supplements; not worth one's time except for individuals who have documented deficiencies.