While there is much debate on which form is better, this 2015 study leans in favor of full spectrum CBD oil products. There are many that believe that other cannabinoids, THC especially, are necessary to take full advantage of what cannabis has to offer. Ultimately, however, we are all different and it comes down to the individual user and their needs. If drug testing is a concern, you’re encouraged to seek out CBD isolate products (or terpsolates) or broad spectrum products instead of full spectrum.
The key difference between hemp and marijuana is that hemp contains practically zero THC. In fact, in order to be classified as hemp, a cannabis plant must contain less than 0.3% THC by volume. This is really important because it’s actually the reason why hemp products are legal to buy, sell, and ship. If they don’t get you high, then why would they be illegal?