There are still very limited studies of the efficacy of CBD products in equines; here is a look at what a few have discovered.
CBD, also knowns as cannabidiol, is a compound found in the plant Cannabis sativa, commonly referred to as marijuana. Cannabis actually produces two compounds of interest, tetra-hydro-cannabinol (THC) and cannabidiol (CBD).
THC is popular with some people for its psychoactive effects, while CBD has shown to have some therapeutic benefits. Also of note, is “hemp”, which is the same plant, but a different cultivar, which mean the same plant is bred for specific qualities. In this case, hemp is grown and used largely for its commercial or industrial use, and is bred to only have 0.3% of THC (based on the USA Federal Farm Bill Act 2018 Sect 297A, hemp must have less than 0.3% delta-9 tetrahydrocannabinol) and usually around 3% CBD, but some varieties may contain up to 25% CBD. In Canada, all cannabinoids are regulated under the Cannabis Act of 2018. Industrial hemp must have less than 0.3% THC, but there is no legal limit to the amount of CBD.
Because hemp is a fast-growing plant, it is also of interest as a potential useful product for horses, as either bedding and/or a high-fiber feed source. A byproduct of hemp is hemp seed oil, which generally only contains marginal amounts of CBD. It should be noted that hemp (or its oil) is not currently approved as a feed ingredient for horses in the US or Canada, although the Hemp Feed Coalition hopes to change that.
Cannabidiol has demonstrated numerous therapeutic benefits in people, including helping those with anxiety, multiple sclerosis, rheumatoid arthritis and others. In fact, the FDA of the United States recognizes CBD as a pharmaceutical drug for humans. In Canada, it is a controlled substance and Health Canada oversees its production and use for humans. If CBD is sold with a health claim, it needs to go through Food and Drug Regulations.
However, this becomes more complicated for its use with animals. CBD is not approved as a pharmaceutical therapy for animals, and yet it is also non-nutritional, often being called a nutraceutical. As we know, much of the nutraceutical industry is unregulated.