Quality is a particular concern, because cannabis plants easily soak up heavy metals from pesticides and other contaminants, Marcu says. If you are buying online, look for a company that documents how it tests its products. (If the website doesn’t indicate this, call and ask.) “Buying from a reputable manufacturer is crucial, because it matters how the plant is cultivated and processed,” Dr. Maroon says. One clue that a company is cutting corners: too low a cost. Good CBD is pricey—a bottle of high-quality capsules is sold in Cohen’s office for $140. But for many, it’s worth the money. Roth spent $60 on her tiny bottle. But when her energy returned the day she started taking CBD, she decided that was a small price to pay.

Herrera and her patients aren't the only ones doling out rave reviews for CBD oil, which can be found online and in cannabis dispensaries, as well as in some grocery stores and even as an optional add-in alongside protein powder at your local juice chain. The oil has been riding the coattails of the growing legal cannabis industry, with one industry expert, Matt Karnes, telling Forbes in 2016 that he expected CBD products to become an almost $3 billion market by 2021.
The reason so many people are interested in cannabis products that don’t make them high, proponents say, is that CBD helps with everything from pain and nausea to rheumatoid arthritis, cancer, Crohn’s disease, and dementia. CBD is anti-inflammatory, anti-anxiety, antibacterial, immunosuppressive, and more, says Joseph Cohen, D.O., a cannabis doctor in Boulder, CO.
Not much, as far as humans are concerned—at least not yet. The vast majority of studies have been on animals, as of yet, and there are few high-quality studies on humans. Even the oil’s effect on pain—something that CBD oil is popularly used for—isn’t proven. “The studies available are small or not well designed,” says Dr. Devinsky. “There’s a lot of religion out there, but not a lot of data.”
Before we directly compare the both, let’s break down what each is. Full spectrum CBD oil comes with all the cannabinoids present in hemp. If you see full spectrum hemp CBD oil for sale, it’ll include many cannabis compounds such as Cannabicycol (CBL), Tetrahydrocannabivarin (THCV), Cannabinol (CBN), Cannabichromevarinic Acid (CBCVA) and more. It also contains a very small amount of THC, (.3%, as is legally allowed).
Isolate CBD is the CBD gets its extraction from the cannabis plant without other terpenes and cannabinoids. Many users of this CBD type consider this much better than the full spectrum. They go as far enough to get this type of CBD by isolating the CBD from others themselves. They are even different dosage methods and levels for each kind of CBDs and therefore should carefully be in separation for each of the CBD types.
Do the right thing for your body and ensure that you only purchase high-quality products from trusted sellers. Once you’ve decided between full spectrum vs regular CBD, you now need to make the choice of picking the right seller. Choose someone with a great reputation and independent lab testing results available on the site for all to see. You certainly want to make sure you get what you pay for! 
Along with its better-known counterpart, THC (delta-9-tetrahydrocannabinol, the chemical that produces the marijuana high), CBD is one of more than 400 compounds found in the oils of cannabis plant species, which include marijuana and hemp. Unlike THC, CBD will not make you high. That said, this doesn’t mean CBD is not at all psychoactive, as many assert, says Jahan Marcu, Ph.D., director of experimental pharmacology and behavior at the International Research Center on Cannabis and Mental Health in New York City: “CBD does change cognition. It affects mood, which is why people take it for anxiety. And some find that it makes them more alert.”
Extracting CBD from the hemp plant is just one part of the process for making CBD hemp oil. Extracted CBD oil is less than palatable. If the consumer’s desire is to make CBD oil part of their everyday routine, producers try to make the oil at least a little bit tasty. Also, consumers require a choice when it comes to the product’s potency, or the strength of the CBD oil-based product. Producers then need to dilute the raw CBD oil to accommodate their needs.
Anyway, the research showed that in mice, CBD was much more effective when used along with other compounds of the cannabis plant, than when it was used by itself. While they haven’t yet figured out why exactly this is the case, it’s now generally accepted that full-spectrum CBD oil is more effective at treating the majority of medical conditions, than is CBD isolate.
Healthy folks vaguely looking to add a little spring in their step (via better sleep, reducing anxiety, or easing muscle soreness) drizzle a little oil into their smoothie or latte. They might also spot-treat with a dab of oil in problematic areas. In the past several years, published papers have suggested that the compound can help with a spectrum of medical conditions, including anxiety, Alzheimer’s disease, addiction, arthritis, inflammatory bowel disease, fractures, migraines, psoriasis, and pain. In an animal study, purified extracts of CBD and THC appeared to slow the growth of a type of brain tumor.

In another, a specific combination of CBD and other secondary cannabinoids were found to work together to slow tumor grown in cases of colon cancer. These sorts of synergistic effects are fairly common in whole plant extracts, and aren’t unique to cannabis. However, the sheer volume of active compounds in cannabis extracts, and their wide-ranging effects certainly distinguish them from other plants.
Quality is a particular concern, because cannabis plants easily soak up heavy metals from pesticides and other contaminants, Marcu says. If you are buying online, look for a company that documents how it tests its products. (If the website doesn’t indicate this, call and ask.) “Buying from a reputable manufacturer is crucial, because it matters how the plant is cultivated and processed,” Dr. Maroon says. One clue that a company is cutting corners: too low a cost. Good CBD is pricey—a bottle of high-quality capsules is sold in Cohen’s office for $140. But for many, it’s worth the money. Roth spent $60 on her tiny bottle. But when her energy returned the day she started taking CBD, she decided that was a small price to pay.

Cannabinol results from the degradation of THC. There is little of it in the fresh plant, but decarboxylation often raises the amount of CBN in the plant as an effect. CBN is only mildly psychoactive and has a higher affinity for the CB2 receptor than the CB1 receptor, linking CBN to the body’s immune system. In hemp oil, CBN is present in levels of 0.2% or lower.


Keep in mind, too, that CBD product companies use different CBD sources, extraction methods and production techniques – and not all resulting products are created equal. You'll have to do your own research to determine which companies you're willing to trust, Asquith says. Plus, how the products are packaged and consumed – be they in oils, creams or capsules – affect how they're absorbed in the body. Edibles, for example, are well-absorbed, while oils taken under the tongue are "baloney," Tishler says. And of course, salespeople at herb shops don't have the same mission, knowledge, training or oversight as physicians and pharmacists. "We have spent the last 100 years or so developing the pharmaceutical system because it works," Tishler says.
There are thousands of unique varieties of hemp. The cultivars used for CBD oil contain significantly higher concentrations of CBD than others. Using these uniquely potent plants, it is possible to extract cannabis oil that contains significant levels of cannabidiol, as well as essential vitamins, minerals, fatty acids, terpenes, flavonoids, and other non-psychoactive cannabinoids.
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