According to a review in just over a day the amount of CBD in your system may be reduced by half of its original value.  The Journal Cannabis and Cannabinoid Research 2016 review paper published that the average half-life of the cannabinoid lasted between 27 to 35 hours after a single dose.  In pharmacology, the term “half-life” refers to the amount of time it takes for the overall quantity of a drug or substance to decrease by HALF of its original value.

With consecutive usage over six weeks, participants showed that it took two to five days to clear half of the CBD out of their system.

The major factors that influence how long CBD stays in your system and how quickly your body processes CBD are the following:
1. Body weight
Cannabinoids like CBD can be stored in fat cells.  Chronic consumers with larger body mass indexes (BMIs) may hold onto excess CBD longer than those who quickly metabolize and burn fat. 
2. Lifestyle
An active lifestyle and fiber-rich diet may eliminate CBD more quickly than those who are more sedentary and eat a low-fiber diet.  The more active you are, the more likely you are to burn fat and eliminate CBD.  Dietary fiber is useful for pulling fatty compounds out of the body. 
3. Individual biochemistry
How quickly an individual processes CBD will depend on their biochemical environment.
Some individuals, regardless of body weight and lifestyle, may clear and metabolize CBD faster than others. 
4. How much and how often you consume
​The most important factor in determining how long CBD will stay in your system is how often you consume the compound and how much you consume in a given dose. 
Frequent consumption and heavier dosage will take longer to leave your system. 

Yes, CBD oil is legal to buy and sell in Arizona. CBD oil derived from hemp doesn’t even require a prescription or medical marijuana card – it is even being sold at gas stations.  More about why you need to know your CBD source here.

Hemp Legalization in Arizona. In 2014, President Barack Obama signed The Farm Bill of 2014, which legalized the research and cultivation of industrial hemp at the federal level. At this time, interest in hemp began to grow as more and more research began to appear, revealing the many uses and benefits of this non-psychoactive form of the cannabis plant. However, the law still allowed for state and local governments to impose their own restrictions on the use of hemp.

In May 2018, when Governor Doug Ducey signed SB 1098, that the cultivation and usage of industrial hemp became legal in Arizona. The Arizona Department of Agriculture requires anyone growing, transporting, harvesting, or processing hemp is required to obtain a license.

Products derived from hemp, including CBD oil, are legal in Arizona as long as the CBD is derived from legally harvested hemp containing no more than 0.3% THC, and that it comes from the mature stalks, oil, stalk fiber, or sterilized seeds of the hemp plant.  

High quality legal hemp derived CBD is available at the CBD Store AZ ​and online here.

CBD is derived from the industrial hemp plant.  Hemp is a bio-accumulator.  Meaning that they absorb contaminants in the soil and air faster than they excrete them.“Literally the plants suck out the toxins into the structure of the plant because of the way the hemp is formed,” Rowlands told Hemp Industry Daily.  Great for bio-remediation, which hemp is utilized for, but not good if being harvested for CBD products.  

As hemp is grown all over the world, in various geographical areas a large disparity of quality products can be assumed.  China is the leading grower with a market share of 70% followed by France and than the USA.  Not all farms are located in pristine growing regions and not all farms grow organically or even sustainably for hemp derived CBD.  Many CBD products are not labeled with origin.  As of date, there are no labeling laws and many CBD products being sold here in the USA originate from farms in other countries that are heavily polluted and/or do not have the stringent growing regulations and certification of the USA.  Within the USA we have our own toxic environments, such as old tobacco farms, that used pesticides, being converted to hemp production.  What about fracking/oil production alongside hemp fields?  
A really simple way to getting premium CBD is to work with a reputable store who can explain everything you need to know to make an informed purchase.  Yes it might be more expensive than the corner convenience store, but they will be unable to answer your questions.  A specialty CBD Store will do the work of research for you.  At CBD Nutritional and the Cbd Store AZ we are your local CBD expert.

CBD oil is legal to buy and sell in Arizona and one is starting to see it everywhere.  So where and how do I buy CBD oil in Arizona.  Well of course some places such as gas stations and convenience stores should be avoided like the plaque.  Look for a specialty store, as they will be specializing in Hemp and should have the time and knowledge to allow for an educated purchase.  As supplements are not required by the government to meet any regulations, one must be sure the CBD oil they purchase is safe, legal, and free of harmful ingredients.   Hemp is a bio-accumulator, meaning it absorbs toxins from the environment, air, water, soil and anything we add to the grow.  You want to be supplementing with something that is  helping you, and not adding more toxins that may cause damage.  That is why it is so important to know your supplier and their source.  They will have done all the research for you and if they can't answer your questions, you should consider purchasing elsewhere.  Some questions to ask of your supplier are:

1. Where are your products grown?  Outdoor?  Old tobacco farm?  Fracking?  
2. How is it grown?  Organic?  Is it legally cultiv​ated industrial hemp by a specific USA State?
3. Is it Whole Plant Full Spectrum, Broad Spectrum Distillate, Isolate or a blend?  
4. How is it cured?  Commercial Dryer? 
5. Do you have 3rd party lab tests?  Potency of CBD & THC (>.3%)?
6. Product labeled with CBD in milligrams, type of CBD, Full Spectrum, Broad Spectrum Distillate, Isolate or Blend, country of origin, batch number for traceability back to lab tests/certification.
7. Does it contain other ingredients?  What and Why?  Are they organic, non gmo?

CBD Store AZ in central Phoenix is your local source for pure organic lab tested USA sun grown CBD products.  They research the farms, processors and analyze lab tests before bringing into the store.  So they do the work for you.   Arizonan, woman owned and they have been involved with cannabinoids for over 7 years.  Not a "Johnny come lately".  They educate the client on all things CBD and is a great place to begin your CBD journey.   You can shop CBD products here.