As you may already know, New Zealand is geographically isolated from the rest of the world and is home to many unique species. Survival of the fittest tells us that only the strongest of the species can survive. Since New Zealand is generally understood to have a very rugged landscape and harsh climates, one could reasonably argue that good genetics could follow.
There are two sides to every story however, and what might be true for one subject may not apply to another. IGF-1 is created in laboratories. The notion that someone gathers and harvests the actual velvet of deer antlers is almost laughable. With that being said, there is nothing inherently wrong with synthetic IGF-1, as its chemical structure is modeled just like it’s natural IGF-1 source. Still, there are variations in product quality and strength in the marketplace. Not all deer antler spray is created equal.
So, to answer the question, are New Zealand deer antler formulas any better than say North American deer antler sprays? Probably not. We would be skeptical. You be the judge, but it will cost you another $50.