Taking Zinc with L-Carnosine or taking Zinc-Carnosine?

I already had a zinc supplement so I just bought a L-Carnosine supplement with the goal to take both at the same time. What I'm reading now though is that Zinc-Carnosine could be a completely different beast.

Is this true or is this just a marketing technique to make you buy their combined stuff?

As it been effective for anybody? I'm a little scared that the zinc might be irritating to my stomach, as iron is.

P.S.: I wanted the supplement right now instead of waiting for delivery, but it's such a rip off here in Canada compared to prices when I buy online. I've got buyers remorse now!