Sadly enough most big companies use artificial "natural" flavorings as opposed to the real deal. I'd do research with brands to see if they're actually using the real herb.
I bought some small-batch shit from artsy fartsy San Francisco called Junipero Gin. It has "juniper" in the name, so I figured it was the best choice. As an added bonus, it is 98.6 proof!
To your health!