Memodyne's naming conflict is an extreme example, but the underlying lesson applies to any cognitive supplement: the label is the only source that actually matters.
A marketing page's ingredient list is not the same thing as a Supplement Facts panel. Look for a source that shows measured amounts, not just names.
Some ingredients on a label may carry a stated dose while others don't. That's worth knowing before you compare a formula's claims against published research, which is almost always done at specific, stated doses.
If you find wildly different ingredient lists under the same product name across different sites, that's a signal to slow down and find the most authoritative, checkable source — not to average the claims together.
"Supports memory" is a claim. "Contains L-Citrulline, a nitric oxide precursor studied for circulation" is a mechanism you can independently research. The second is more useful, and more honest.