According to a 2017 study in the Journal of the American Medical Association, only 30.95% of CBD products sold online were correctly labeled. Most contained less CBD than advertised, while 21.43% had significant amounts of THC.
In addition, the stroke volume (the amount of blood remaining in the heart after a heartbeat) was significantly reduced, meaning that the heart was pumping more efficiently.
In all but a few studies, lower doses of CBD (10 milligrams per kilogram, mg/kg, or less) improved some symptoms of anxiety. Higher doses (100 mg/kg or more) exhibited virtually no effect.
What to Look For
CBD oil comes as full-spectrum oils or in forms that contain CBD isolates. Unlike isolates, which contain CBD only, full-spectrum oils contain a variety of compounds found naturally in the cannabis plant, including proteins, flavonoids, terpenes, and chlorophyll. Alternative practitioners believe these compounds offer more substantial health benefits, although there is no clear evidence of this.
To use CBD oil, place one or more drops under the tongue and hold the dose there for 30 to 60 seconds without swallowing. Capsules and gummies are easier to dose, although they tend to be more costly. CBD sublingual sprays are available as well.
Here is just some of what the current evidence says.
Proponents claim that CBD oil can treat a wide variety of health problems, including:
ESHA Research, Inc., Salem, Oregon: “Hemp Oil.”
Journal of Dermatological Treatment: “Efficacy of dietary hempseed oil in patients with atopic dermatitis.”
Brain, Behavior, and Immunity: “Omega-3 Supplementation Lowers Inflammation and Anxiety in Medical Students: A Randomized Controlled Trial.”
Potential Risks of Hemp Oil
Hemp oil is made from hemp seeds. In one serving of hemp seeds (3 tablespoons), you’ll find the following:
It’s possible that ingesting CBD-containing oils like hemp oil can cause an upset stomach or diarrhea. Again, when you’re first introducing hemp oil into your diet, start small to see how it impacts you. Reactions may be different from person to person.
The amino acid arginine is present in hempseed oil. Studies have shown that this ingredient contributes to a healthy cardiovascular system. Consuming foods with high arginine levels can help decrease the risk of heart disease.
Harvard Men’s Health Watch: “Iron and your health.”