Not all CBD is created equally. Some tinctures are created with little regard to overall consumer safety, and may contain harmful chemicals and pesticides. Other CBD products have been shown to differ from what the label says, either with way more cannabidiol, or way less. In some cases, the THC content was elevated above the federal legal limit for hemp extracts.
Most human studies of CBD have been done on people who have seizures, and the FDA recently approved the first CBD-based drug, Epidiolex, for rare forms of epilepsy. Clinical trials for other conditions are promising, but tiny. In one Brazilian study published in 2011 of people with generalized social anxiety disorder, for example, taking a 600-mg dose of CBD (higher than a typical dose from a tincture) lessened discomfort more than a placebo, but only a dozen people were given the pill.
Generally, CBD oil is made by combining an extract with a carrier fluid or oil. This question is best answered by looking at how the CBD oil was extracted. CBD oil can be extracted using CO2 systems or by using chemical solvents. Both methods produce a CBD oil byproduct that is then combined with a fluid like MCT oil, coconut oil, or olive oil so that it can be delivered to the body. Always check to make sure you know the CBD content of the products you purchase.
Pioneers of the CBD industry, 4 Corners Cannabis helped pave the way for companies that want to provide quality products and utilize best practices. They grow their own strain of hemp and make small batches of true full-spectrum CBD products. Their prices place them lower down on our ranking, but their highly satisfied customers are more than willing to pay for the 4 Corners quality.  
The human body has an endocannabinoid system — a natural system that maintains homeostasis or balance, in the body. The endocannabinoid system has CB1 and CB2 receptors. These are found throughout the body. CB1 receptors are generally located in the central and peripheral nervous system and CB2 receptors are generally found in the brain, immune system, and gastrointestinal system. CBD binds to these receptors creating changes and effects in the body
NuLeaf Naturals CBD oil tinctures are all full spectrum; it is 100% organic and never made with herbicides, pesticides, or chemical fertilizers. The brand offers a full spectrum pet CBD oil tincture, as well. NuLeaf Naturals offers free shipping to all 50 states; the brand’s products are also sold in more than 1,000 retail locations across the country.
NuLeaf only offers one concentration of CBD oil, 50 mg/ml, and the ingredients are as simple as it gets: USDA Certified organic hemp oil and full spectrum hemp extract. NuLeaf essentially has only one product. But this strategy allows them to keep their prices reasonable and offer bulk buying options—you can buy a bottle of NuLeaf CBD oil containing 240 mg total CBD all the way up to 4,850 mg.
These policies vary widely. Marijuana and CBD are currently fully legal for both medicinal and recreational purposes in Alaska, California, Colorado, Maine, Massachusetts, Michigan, Nevada, Oregon, Vermont, Washington, and Washington D.C. In 23 states, it's legal in some form, such as for medicinal purposes. Another 14 states permit just CBD oil. But both are illegal in Idaho, Nebraska, and South Dakota. For more information, the organization Americans for Safe Access has a helpful guide to the specific laws in each state.
Being more a traditional gal, it’s kind of funny that I like Hemp Bombs CBD so much. Judging by their Instagram and so forth it seems like they’ve made an effort to appeal to a younger, more “hip” crowd, but I don’t care – they sell some darn good CBD products and that’s the only thing that matters to me. And actually, if you’re into vaping CBD oil or prefer to use a CBD vape pen, they’re definitely the company that I would recommend the most. I’m not huge into vaping myself, but they’ve got a MASSIVE range of high-quality (and highly potent) CBD vape products in addition to the standard stuff like oral tinctures and CBD capsules. My partner has even used the “Sugar Cookie Kryptonite” vape liquid and absolutely loved it! Really, you’ve got to just spend some time browsing their store to come to terms with the huge range of products they’ve got: CBD “Pain Freeze,” CBD “Max Chill Shots,” and even a brand new product called CBD Beard Oil!!

CBD has proven neuroprotective effects and its anti-cancer properties are being investigated at several academic research centers in the United States and elsewhere. A 2010 brain cancer study by California scientists found that CBD “enhances the inhibitory effects of THC on human glioblastoma cell proliferation and survival.” This means that CBD makes THC even more potent as an anticancer substance. Also in 2010, German researchers reported that CBD stimulates neurogenesis, the growth of new brain cells, in adult mammals.


Green Gorilla marks itself out by simply blending its flagship line of CBD oils with organically produced extra virgin olive oil – and nothing else. And, as the company states, there’s a benefit to this beyond assuring the product’s purity. In particular, olive oil “has synergistic effects in combination with CBD,” and according to Green Gorilla’s website, it’s “also able to deliver the CBD to the parts of [the] body that need it most.” The products are certainly affordable, too: its 150 mg pure CBD oil comes in at $25.99, for instance, making it a smart choice for new users. And anyone still uncertain about the potential effects of Green Gorilla’s products may have their questions answered by the convenient “science” section of the manufacturer’s website, which neatly explains the difference between THC – the cannabinoid that makes people “high” – and CBD.
Koi CBD probably should be higher up on this list given their popularity, but since they’re geared more towards vaping and CBD vape oils, and I have never really used them too much. People who do use them everyday though say that they’ve got the best flavors of any CBD vape oil on the market, and I can say personally that their CBD gummies and spearmint CBD oil work decently as well. I would recommend Koi CBD if you’re big into vaping and have yet to find a CBD vape oil that you like, and/or if you’re looking for a reputable brand that sells high quality oral CBD tinctures as well as edibles and vape products – might as well order everything in one place.

CBD oil products generally have a shelf life of at least one year, if stored in a cool, dark place. Refrigeration is typically not necessary as long as it is kept somewhere where the temperature is less than 77 degrees Fahrenheit. Tinctures that use MCT coconut oil as the carrier oil are known to have a longer shelf life than those with hemp seed oil as the carrier oil.

Cannabidiol (CBD) is a naturally occurring compound found in the resinous flower of cannabis, a plant with a rich history as a medicine going back thousands of years. Today the therapeutic properties of CBD are being tested and confirmed by scientists and doctors around the world. A safe, non-addictive substance, CBD is one of more than a hundred “phytocannabinoids,” which are unique to cannabis and endow the plant with its robust therapeutic profile.
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