Im sure most local gnc personnel don't know anything about us. We don't have products in gnc. A vendor number would be assigned at a corporate level. I am a district manager with my company and I have no idea what our corporate office does unless they want us to know. I don't see it as any kind of a worry.
It was probably more of a "deer in headlights" look which is typical of most GNC employees. They have no clue what's going on....aside from pushing the product they get paid most commission off of. Tweet the CEO of GNC. He'll give you the answer most of us have already seen. It's legit.