A colleague of Mechoulam’s, Marc Feldman at Imperial College, London, tested CBD on mice that had a version of rheumatoid arthritis. He found that CBD reduced the mice’s inflammation by 50% at the right dosage. Cardiologists working with the mice at Hebrew University have found that a dosage of CBD immediately following a heart attack can reduce infarct size by about 66%.
The way that CBD works — and the full range of its applications and health benefits — is still being explored, but it very broadly has something to do with the compound's natural analgesic effects and its interaction with your body's endocannabinoid system. For more information, pick up the forthcoming book, "CBD Oil: Everyday Secrets" by wellness editor and writer Gretchen Lidicker; it's perhaps the best summary of what we know about the compound, questions for further research, and how to buy and use CBD products in our daily lives. What I can tell you is that it really works for me.
Hemp oil is a "drying oil", as it can polymerize into a solid form. Due to its polymer-forming properties, hemp oil is used on its own or blended with other oils, resins, and solvents as an impregnator and varnish in wood finishing, as a pigment binder in oil paints, and as a plasticizer and hardener in putty. It has uses similar to linseed oil and characteristics similar to tung oil.[34]
The other issue relates to a lack of guidelines. CBD products don't have any labeling standards or dosage guidelines, and in many instances consumers aren't aware how much CBD they're receiving in restaurants and coffee shops that are using CBD in food and beverages. It's also become difficult for some consumers to determine what items on a menu contain CBD and which one's don't. Until there's a better way to pass along this labeling and dosing info to the consumer, it could be difficult for CBD edibles of any form to thrive. 
You can think of the full spectrum of all the chemical compounds found in cannabis as the “language” of the plant. It’s not one chemical, but all the chemicals combined working together that cause a response (again, the entourage effect). When you consume CBD oil, you gain the benefits of all those chemical substances in natural synergy. For that reason, you get full benefit at a dose range of 25-50 mg.

Plants that qualify as industrial hemp, by the standards of the 2014 Farm Bill, must contain less than .3% THC. But the sale of hemp products is seemingly only permitted when derived from the stalks and seeds of the plant (as opposed to the flowers, where a lot of the good stuff is). Mix in the phenomenon known as the "entourage effect" — which demonstrates that CBD is most effective when used in combination with other cannabinoids, leading many to seek a "whole plant" or "full spectrum" version of the compound — and that's where it gets tricky. Are producers of hemp-derived CBD really only using stalks? Would that product be very effective? It remains unclear.
Hemp oil can be of various types depending on ways in which it is processed. Cold pressed but unfiltered hemp oil is dark green  and unclear liquid. It has an nut like flavor, somewhat grassy. The refined hemp oil is however colorless and lacks much of the original flavor of unrefined hemp oil. The refined version also lacks in many nutrients that are present in hemp seeds naturally.

The glutamatergic system is integral to development and maintenance of neuropathic pain, and is responsible for generating secondary and tertiary hyperalgesia in migraine and fibromyalgia via NMDA mechanisms (Nicolodi et al 1998). Thus, it is important to note that cannabinoids presynaptically inhibit glutamate release (Shen et al 1996), THC produces 30%–40% reduction in NMDA responses, and THC is a neuroprotective antioxidant (Hampson et al 1998). Additionally, cannabinoids reduce hyperalgesia via inhibition of calcitonin gene-related peptide (Richardson et al 1998a). As for Substance P mechanisms, cannabinoids block capsaicin-induced hyperalgesia (Li et al 1999), and THC will do so at sub-psychoactive doses in experimental animals (Ko and Woods 1999). Among the noteworthy interactions with opiates and the endorphin/enkephalin system, THC has been shown to stimulate beta-endorphin production (Manzanares et al 1998), may allow opiate sparing in clinical application (Cichewicz et al 1999), prevents development of tolerance to and withdrawal from opiates (Cichewicz and Welch 2003), and rekindles opiate analgesia after a prior dosage has worn off (Cichewicz and McCarthy 2003). These are all promising attributes for an adjunctive agent in treatment of clinical chronic pain states.

CBD Cream