I have tried NatureCBD and believe in the product. I particularly noticed alleviation in joint pain and reduction in stress – although stress reduction may have been supported by pain reduction. However, since I live in Canada and it is expensive to ship, I have been using CBD from a licensed medical marijuana facility. The effect is not as powerful as from NatureCBD. I had not really considered the bioavailability issue; perhaps that is the reason for the weaker effect. Or possibly it could be the other herbs added, or the synergistic effect. In any case, I am going to bite the bullet (at least my visa card will) and go back to NatureCBD.
In the United States, non-FDA approved CBD products are classified as Schedule I drugs under the Controlled Substances Act. This means that production, distribution, and possession of non-FDA approved CBD products is illegal under federal law. In addition, in 2016 the Drug Enforcement Administration added "marijuana extracts" to the list of Schedule I drugs, which it defined as "an extract containing one or more cannabinoids that has been derived from any plant of the genus Cannabis, other than the separated resin (whether crude or purified) obtained from the plant." Previously, CBD had simply been considered "marijuana", which is a Schedule I drug.