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Some CBD products may yield cannabis-positive urine drug tests

In a study of six adults, Johns Hopkins Medicine researchers report evidence that a single vaping episode of cannabis that is similar in chemical composition to that found in legal hemp products could possibly result in positive results on urine drug screening tests commonly used by many employers and criminal justice or school systems.

The U.S. government defines hemp as any crop of cannabis containing 0.3% THC or less in dry weight. THC (delta-9-tetrahydrocannabinol) is the substance in cannabis that confers a “high” and produces the subjective and cognitive effects that are typically synonymous with cannabis. The 2018 U.S. Farm Bill legalized the production and sale of hemp, and now as a result, consumer hemp products, such as oils, vaping cartridges and hemp flowers for smoking can be legally purchased in specialty stores, general retail stores and through websites across the U.S.

Hemp is now increasingly finding use in medicine and wellness markets, particularly for its component CBD, short for cannabidiol, which is one of the more than 100 cannabinoids found in the cannabis plant. According to New York-based investment bank Cowen & Co., the market for CBD last year ranged from $600 million and $2 billion in sales. Despite the size of this booming industry, it remains largely unregulated.

In a paper published Nov. 4 in the Journal of Analytical Toxicology, the researchers report that two out of six study participants tested positive after vaping cannabis that contained 0.39% THC using urine testing methods that are consistent with testing frequently performed for employment-related or criminal justice-related urine drug testing programs. Though the cannabis used in this study does not currently meet the federal definition of hemp, the THC concentration of 0.39% exceeds federal regulation by just 0.09%.

“People who use legal hemp products for medical intent rarely just use them once as we did in this study, and prior studies show that THC and its metabolites may accumulate with repeated use,” says postdoctoral fellow Tory Spindle, Ph.D., a researcher in the Behavioral Pharmacology Research Unit at the Johns Hopkins Bayview Medical Center. “What this means is that people need to be wary of single-dose or cumulative THC exposure and be aware that these now legal products may cause an unexpected positive result on a drug test.”

“Because the market for CBD products is so new and the popularity of use is growing so quickly, we want the public to be aware that a positive drug test is possible,” says Ryan Vandrey, Ph.D., associate professor of psychiatry and behavioral sciences at the Johns Hopkins University School of Medicine. Vandrey and his collaborators at the University of Pennsylvania previously showed in a JAMA study that 21% of CBD/hemp products sold on the Internet contained THC, even though it wasn’t listed on the product labels. “I have a hard time finding anyone who hasn’t used a CBD product at least once, but most are completely unaware of the possibility of THC exposure or a positive drug test as a result of using these newly legalized products,” says Vandrey.

trials demonstrated CBD to be an effective treatment for two rare forms of pediatric epilepsy, however, there is currently insufficient evidence to support use for any other health condition according to the U.S. Food and Drug Administration. Despite this, CBD product suppliers and consumers claim benefits of CBD for a wide range of purposes, including everything from anxiety to insomnia to general wellness. CBD products can be swallowed in the form of an oil/tincture, eaten in a food product (e.g., gummy bears), inhaled using “vape pens” similar to electronic cigarettes, or applied topically to the skin in a cream, patch, balm or gel.

For the current study, the researchers recruited three women and three men with an average age of 31 years old. One participant self-reported as African American and the rest as white.

The batch of cannabis used in this particular study contained 10.5% CBD and 0.39% THC, a 27 to 1 ratio of CBD to THC that is similar to what is often found in legal hemp/CBD products. In the study, research volunteers vaporized a little less than 1 gram of cannabis, which contained a total dose of 100 milligrams of CBD and 3.7 milligrams of THC. To vape the cannabis, heated cannabis vapor was collected into a balloon that was then inhaled by the participant.

In addition to vaping the high CBD/low THC cannabis, study volunteers also were given pure CBD in a capsule, vaporized pure CBD and placebo (a mock CBD pill and vaporized cannabis in which CBD and THC had been removed) in three other dosing sessions, one week apart from each other. In all active drug conditions (excluding placebo), the CBD dose delivered was 100 milligrams per session.

The drug testing cut-off used to determine a “positive” result in this study was a “screening” concentration of at least 50 nanograms per milliliter of THCCOOH, a metabolite used to indicate whether someone has used cannabis, in the urine sample using an on-site “dipstick” test. A positive on that test was then “confirmed” at a 15 nanograms per milliliter cut-off of THCCOOH using a more sensitive test method.

Two of the six participants who vaped the low-THC/high-CBD cannabis tested positive for THCCOOH.

No positive urine drug test results were observed in the other test sessions (pure CBD capsules, pure CBD vape or placebo).

“These results suggest that pure CBD, used once by itself, will not cause a positive drug test,” says Vandrey. Adding to this, Spindle points out that it “does not take much THC exposure to trigger a positive test for some people.” There may be variation from person to person in drug metabolism and puffing behaviors such as inhalation depth, which might contribute to the breakdown or buildup of cannabinoids in the body, the researchers say.

The team says they plan to repeat their studies using products that fall within the current federal hemp regulations with respect to THC content, and additionally study the impact of repeated CBD/hemp exposure on drug testing outcomes.

Other authors on the study were Edward Cone and George Bigelow of Johns Hopkins, David Kuntz of Clinical Reference Laboratory, John Mitchell of RTI International and Ronald Flegel of the Substance Abuse and Mental Health Services Administration (SAMHSA).

This research was supported by SAMHSA and the National Institute on Drug Abuse (T32DA07209).

COI: Vandrey has been a paid consultant for or received honoraria from Zynerba Pharmaceuticals, FSD Pharma and Canopy Health Innovations Inc.

Hemp is now increasingly finding use in medicine and wellness markets, particularly for its component CBD, short for cannabidiol, which is one of the more than 100 cannabinoids found in the cannabis plant. According to New York-based investment bank Cowen & Co., the market for CBD last year ranged from $600 million and $2 billion in sales. Despite the size of this booming industry, it remains largely unregulated.

In a paper published Nov. 4 in the Journal of Analytical Toxicology, the researchers report that two out of six study participants tested positive after vaping cannabis that contained 0.39% THC using urine testing methods that are consistent with testing frequently performed for employment-related or criminal justice-related urine drug testing programs. Though the cannabis used in this study does not currently meet the federal definition of hemp, the THC concentration of 0.39% exceeds federal regulation by just 0.09%.

“People who use legal hemp products for medical intent rarely just use them once as we did in this study, and prior studies show that THC and its metabolites may accumulate with repeated use,” says postdoctoral fellow Tory Spindle, Ph.D., a researcher in the Behavioral Pharmacology Research Unit at the Johns Hopkins Bayview Medical Center. “What this means is that people need to be wary of single-dose or cumulative THC exposure and be aware that these now legal products may cause an unexpected positive result on a drug test.”

“Because the market for CBD products is so new and the popularity of use is growing so quickly, we want the public to be aware that a positive drug test is possible,” says Ryan Vandrey, Ph.D., associate professor of psychiatry and behavioral sciences at the Johns Hopkins University School of Medicine. Vandrey and his collaborators at the University of Pennsylvania previously showed in a JAMA study that 21% of CBD/hemp products sold on the Internet contained THC, even though it wasn’t listed on the product labels. “I have a hard time finding anyone who hasn’t used a CBD product at least once, but most are completely unaware of the possibility of THC exposure or a positive drug test as a result of using these newly legalized products,” says Vandrey.

Trials demonstrated CBD to be an effective treatment for two rare forms of pediatric epilepsy, however, there is currently insufficient evidence to support use for any other health condition according to the U.S. Food and Drug Administration. Despite this, CBD product suppliers and consumers claim benefits of CBD for a wide range of purposes, including everything from anxiety to insomnia to general wellness. CBD products can be swallowed in the form of an oil/tincture, eaten in a food product (e.g., gummy bears), inhaled using “vape pens” similar to electronic cigarettes, or applied topically to the skin in a cream, patch, balm or gel.

For the current study, the researchers recruited three women and three men with an average age of 31 years old. One participant self-reported as African American and the rest as white.

The batch of cannabis used in this particular study contained 10.5% CBD and 0.39% THC, a 27 to 1 ratio of CBD to THC that is similar to what is often found in legal hemp/CBD products. In the study, research volunteers vaporized a little less than 1 gram of cannabis, which contained a total dose of 100 milligrams of CBD and 3.7 milligrams of THC. To vape the cannabis, heated cannabis vapor was collected into a balloon that was then inhaled by the participant.

In addition to vaping the high CBD/low THC cannabis, study volunteers also were given pure CBD in a capsule, vaporized pure CBD and placebo (a mock CBD pill and vaporized cannabis in which CBD and THC had been removed) in three other dosing sessions, one week apart from each other. In all active drug conditions (excluding placebo), the CBD dose delivered was 100 milligrams per session.

The drug testing cut-off used to determine a “positive” result in this study was a “screening” concentration of at least 50 nanograms per milliliter of THCCOOH, a metabolite used to indicate whether someone has used cannabis, in the urine sample using an on-site “dipstick” test. A positive on that test was then “confirmed” at a 15 nanograms per milliliter cut-off of THCCOOH using a more sensitive test method.

Two of the six participants who vaped the low-THC/high-CBD cannabis tested positive for THCCOOH.

No positive urine drug test results were observed in the other test sessions (pure CBD capsules, pure CBD vape or placebo).

“These results suggest that pure CBD, used once by itself, will not cause a positive drug test,” says Vandrey. Adding to this, Spindle points out that it “does not take much THC exposure to trigger a positive test for some people.” There may be variation from person to person in drug metabolism and puffing behaviors such as inhalation depth, which might contribute to the breakdown or buildup of cannabinoids in the body, the researchers say.

The team says they plan to repeat their studies using products that fall within the current federal hemp regulations with respect to THC content, and additionally study the impact of repeated CBD/hemp exposure on drug testing outcomes.

Other authors on the study were Edward Cone and George Bigelow of Johns Hopkins, David Kuntz of Clinical Reference Laboratory, John Mitchell of RTI International and Ronald Flegel of the Substance Abuse and Mental Health Services Administration (SAMHSA).

This research was supported by SAMHSA and the National Institute on Drug Abuse (T32DA07209).

A small study concludes that caution is warranted for users of ‘high CBD, low THC’ cannabis products.

Does Hemp Lotion Contain THC?

Hemp lotions do not contain THC, but that doesn’t mean they’re lacking benefits. Image Credit: By Jan Mika on Shutterstock

Today, hemp lotions can be found in drugstores across the United States, standing next to some of the best-known beauty products in the world. Many are branded with instantly-recognizable images of the cannabis leaf or exotic taglines like “made with pure cannabis sativa seed oil.” This packaging often leads to consumer confusion, with some wondering: Does hemp lotion contain THC? Can it get you high?

The answers? No and no.

Since THC is still a controlled substance under federal law, any product that contains it must be clearly marked and only sold in licensed establishments. So, there’s little chance of accidentally picking up a THC-rich lotion while strolling through your local pharmacy, whether your state has legalized cannabis or not.

But even skin care products that do contain THC won’t get you high, since they contain insufficient amounts to cause psychoactive effects. In the case of hemp lotions, though, there’s simply no THC to start with.

That’s because hemp lotions are made from hemp seed oil, which is a completely different than CBD oil (which won’t get you high, either) or THC-rich cannabis oil (which can, but only when smoked, vaped, or eaten). Hemp seeds don’t contain either of those cannabinoids, which is why you should remember CBD products made only from hemp seed oil are not effective.

While hemp lotions might not ease your anxiety or make you more excited to go to the gym, they do have their advantages (aside from not turning up on a drug test). There’s a reason they’ve been around for years — here’s why they might be worth a try.

The Benefits of Hemp Lotion

It’s not going to be useful to you if you’re looking for a high, but if clear, healthy skin is your goal, then hemp lotion could be perfect. It has a wide range of health benefits for all skin types, from those prone to pimples to those with severe eczema.

It’s Great For Dry Skin
One of the best ways to treat dry skin is to use a non-comedogenic product (this means an oil that doesn’t clog the pores) with a rich fatty acid and essential oil content. For this, you need look no further than hemp lotions. Hemp plants are packed with these important nutrients, which have been clinically proven to reduce dryness. You can also use hemp lotion as a body moisturizer to soften stubborn patches of dry skin, such as on the knees or elbows.

It Could Treat Acne
Hemp plants have powerful antibacterial properties and, although most people don’t know it, acne is a bacterial skin infection. Excess oil clogs the pores and bacteria grow inside them as a result. Studies have shown that hemp oil can kill even the most stubborn bacteria and, if used in topical skin care products, could act as an effective treatment for those that cause acne.

It Can Reduce Redness
Hemp-based lotions can reduce redness in the skin thanks to the anti-inflammatory abilities of hemp oil. This is useful for people dealing with chronic skin problems like rosacea whose symptoms include heavy pigmentation. Used as a daily moisturizer, a good hemp lotion can help to calm the immune system’s inflammatory response and restore a balanced skin tone to the face.

It Soothes Sensitive Skin
Between 40 and 50 percent of Americans have sensitive skin. This is the most difficult skin type to treat, as most products irritate it further. But hemp lotions aren’t likely to have that effect — especially organic and/or vegan products derived from plants grown without harsh chemicals — since they’re rich in Vitamin E, which helps strengthen the skin’s protective barriers and protect it against sun damage, pollution, and other irritants.

No, hemp lotion doesn't have THC — here's why not (and why it still might be worth a try).