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how long does a topical cbd last

Keep in mind that even hemp-derived CBD products are legally allowed to contain up to 0.3% THC. This could cause hesitation for some CBD-curious consumers who don’t want THC in their system or risk a false positive result on a drug test. However, the chances of failing a drug test from using hemp-extracted CBD oil are extremely slim. You would need to take an exorbitant dosage of full-spectrum CBD oil (estimates range from 1,000 to 2,000 milligrams per day) to risk a positive drug test result.

Studies show that when the liver metabolizes CBD compounds, they undergo what is called the “first-pass effect.” Enzymes in the liver reduce CBD concentration before the remainder is finally sent to the bloodstream and circulated throughout the body. While oral consumption of CBD has become popular for its ease of use, it can be an inefficient method of consumption compared with inhalation or sublingual administration. This is because only about 5% of swallowed CBD ends up in the bloodstream, meaning this method provides low bioavailability.

Swallowing CBD oil prevents the cannabinoid from entering the bloodstream right away. Instead, it will travel first through the digestive tract and eventually on to the liver, where it will be broken down before finally reaching the bloodstream.

Will CBD show up on a drug test?

Here, we’ll cover the existing research on CBD and its interaction with the human body as well as what factors can affect how long CBD stays in your system.

Cannabidiol (CBD), a non-intoxicating compound found in the cannabis plant, may potentially relieve mild pain and anxiety. While many people are using CBD for these potential benefits, the fear of failing a drug test looms large for others. Because even with the legalization of hemp-derived CBD products in the US, there’s still some uncertainty about how CBD interacts with the body.

Oral ingestion is the most common method of CBD consumption. Administering a couple of drops of CBD oil directly into the mouth is certainly a convenient way to reap the potential benefits of this therapeutic cannabinoid. However, ingestion is not necessarily the most effective consumption method for those who want to feel the effects of CBD immediately.

A 2018 review of existing CBD studies found that the estimated half-life of CBD was two to five days for those who took a daily oral dose. Other delivery methods delivered varied half-lives.

When ingesting CBD edibles, the same principle applies. Let’s say, for example, you’re taking CBD gummies or adding a few drops of CBD oil into your favorite recipe. It will ultimately go through the same lengthy process and reduce the total CBD concentration in your bloodstream. With ingestion, it could be one to two hours before the effects of CBD finally set in.

Bottom line: Ingesting CBD via a tincture or a CBD oil-infused edible will result in a longer onset (up to two hours) and possibly weaker effects.

Inhalation

Your body’s metabolism affects how long it takes to process and metabolize cannabinoids. Photo by: Gina Coleman/Weedmaps

CBD patches deliver a long-lasting dose very efficiently. Photo by: Shutterstock

Studies show that when CBD compounds are metabolized by the liver, it undergoes what is called the “first pass effect,” where enzymes in the liver reduce CBD concentration before the remainder is finally sent to the bloodstream and circulated throughout the body.