Remember: Do not ingest CBD topicals. They should be used externally only. If your skin symptoms have appeared suddenly or if they are very strong and painful, you should first consult your physician before using any supplements or salves. Don't use salves on open, bleeding wounds. Also, do not apply CBD topicals if you are pregnant, lactating, or suffering from a serious illness.
Cannabidiol has been found to act as an antagonist of GPR55, a G protein-coupled receptor and putative cannabinoid receptor that is expressed in the caudate nucleus and putamen in the brain. It has also been found to act as an inverse agonist of GPR3, GPR6, and GPR12. Although currently classified as orphan receptors, these receptors are most closely related phylogenetically to the cannabinoid receptors. In addition to orphan receptors, CBD has been shown to act as a serotonin 5-HT1A receptor partial agonist, and this action may be involved in its antidepressant, anxiolytic, and neuroprotective effects. It is an allosteric modulator of the μ- and δ-opioid receptors as well. The pharmacological effects of CBD have additionally been attributed to PPARγ agonism and intracellular calcium release.
Under federal law, cannabis (from which both CBD and marijuana are derived) is illegal everywhere, although the laws against it aren’t generally enforced in states that have legalized marijuana. Some manufacturers claim that CBD culled from legally imported industrial hemp, which has little to no THC, is fine to ship across the U.S., but many experts disagree, noting that because hemp comes from the same species as marijuana, cannabis sativa, all CBD falls under the DEA’s Schedule 1 designation. “This creative interpretation of the law runs afoul of reality,” says the Brookings Institution, a Washington, DC, think tank.
This all serves to underline the importance of testing CBD extract for the various levels of active ingredients. If your homemade CBD extract contains a high amount of THC it could be illegal in your country and require you use either a different method of extraction, or more likely, the need to find a source of hemp that has lower THC. As more scientific literature emerges supporting the entourage effect, and increased benefits of full-spectrum CBD compared to CBD isolate, we can expect the manufacture and sale of CBD goods based around isolate to greatly reduce in the coming years.
There’s a growing body of scientific evidence to support the use of topical CBD products to ease pain, inflammation, and the symptoms of arthritis. One study using rats found that topical CBD has “therapeutic potential for relief of arthritis pain-related behaviours and inflammation without evident side-effects.” More scientific research on humans is needed to confirm all of CBD’s benefits, but the initial research into topical use in humans is also promising.
A THC-rich rub infused with cooling menthol and peppermint is a perfect way to wind down from a brutal workout or hike. For intense localized pain, you may try a warming balm that combines the deep painkilling properties of cannabinoids with a tingling, soothing sensation. Inflammation symptoms may require a different chemical profile, as Cannabis Basics’ CEO Ah Warner explains:
It’s important that you are applying the CBD topical to areas of the skin that are unaffected by other skin-care products. Making sure that you are applying your topicals to clean, product-free skin ensures that your skin is effectively absorbing the oil in its entirety. Mixing CBD oil with other products will only dilute the effects and reduce its effectiveness.