Cannabidiol or CBD is a cannabis compound with psychoactive effects - it affects the mood or perception. Cannabis is a plant often referred to as marijuana, and it is used for many reasons. Not all cannabis compounds produce a euphoric high and CBD is one of those non-high-producing compounds.The active compound in pot that makes you high is THC. CBD is not THC even though there are trace amounts of THC in CBD oils and supplements it is not enough to produce a euphoric high. It is that very reason that researchers and doctors are excited about the potential that CBD offers because it provides many positive benefits while removing the biggest negative - the high.
The Rise of CBD Oil
There had been very little interest in CBD oil until mid-2013 when its medicinal effects became a pillar in the argument to legalize marijuana. Since that time, CBD oil search terms have produced a J curve and at the current time interest is growing almost vertically, and that interest is making CBD oil one of the hottest supplements available. This could prove that selling CBD oil online or in stores an educated business decision.
CBD Oil and Depression
Cannabidiol has antidepressant-like and anxiolytic-like (anti anxiety and anti-panic) effects. 
A study that appeared in CNS Neurological Disorders Drug Targets and that was found on the US National Library of Medicine's site discussed the use of Cannabidiol (CBD) as a treatment for depression and anxiety in lab animals. The result of the study showed that CBD had an antidepressant and antianxiety effect on the study's animals during testing.
More specifically with the use of CBD oil for depression, the animals brains showed a non-activation of the CB1 and CB2 neuro-receptors with a positive effect at the 5-HT1A neuro-receptor. When activated, CB1 and CB2 produce the high associated with THC. The 5-HT1A neuro-receptor, when activated, enhances the effects of SSRI - antidepressants. 
How to Use CBD Oil for Depression
One of the surrounding issues with medical marijuana is that the dose between one unit and the next are never the same. This is also prevalent in configuring the right CBD oil for depression dosages. When you go to the doctor, and you get a prescription, each pill you take has an exact dosage of the active ingredient. That difference makes it difficult to learn how to use CBD oil for depression. Well, CBD oil is the answer as other methods of obtaining CBD are not as accurate. You can eat dried hemp flowers, but the amount of CBD is not accurate. You can take dried hemp supplements as an alternative.
How to Determine CBD Oil for Depression Dosage
The preferred method of how to use CBD oil for depression is when it is placed under the tongue. What is important to understand that a drop is a measurement of liquid where as a dose is the amount of CBD per drop. Not all dosages are the same, and it is important to pay close attention to CBD concentrations.
The general guidelines for various treatments are as follows:
The CBD dosages for general health range from 2.5 mg to 15 mg per day. What consumers need to understand is that they should start with the lowest dose to determine how their body will react to CBD. As a plant substance, an allergic reaction is possible.
CBD dosage range from 2.5 mg per day to 160 mg per day. To determine your correct dose, you will need to start with 2.5 mg to make sure there are no side effects and then work up to a dose that controls your symptoms.
Note: Depression and anxiety affect each of us differently. That makes these disorders very personal. CBD oil also affects us differently so finding the correct CBD oil for depression dosage is a personal-by-person journey, and that too is one of the benefits of CBD oil for depression - you have more control over how much you take.
The Market Perspective
The massive increase in Google searches for CBD oil and depression indicates that the market for this type of supplement is very strong and very active. If you are a private label supplement brand, then this is likely a product that fits into most private label brand offerings.
In addition, depression is a disorder with a wide range of symptoms that range from mild to severe. Many people prefer to self-medicate rather than seek help from a doctor, or they do not like the effects of prescription antidepressants and want something that is more natural. Those people are looking for supplements that help them to function without having to take prescription drugs.
In short, the market for CBD is expanding quickly, and this is a product that people are actively looking to research or purchase.