SILVER SPRING, Md. — Food and Drug Administration regulators grilled manufacturers and advocates Friday for evidence that CBD actually does anything they claim it does. Companies are adding CBD, short for cannabidiol, to just about everything, including makeup, tea, pet treats and soft drinks — even though there's little data to support the many claims of its benefits. FDA regulators trying to learn more about the cannabis compound held the agency's first hearing on it Friday. More than 100 people testified at the hearing. Speakers pushed the FDA to set up a regulatory framework to legally add CBD to food products and dietary supplements. They praised CBD and the purported benefits — and FDA panelists repeatedly asked for data. Scientists warned of the little research and many potential risks CBD brings. Regulators requested data on how companies develop dosage recommendations for different people and purposes. They asked about the health benefits of CBD and why companies are adding them to consumer products. They also wanted to learn more about what happens when people use CBD in multiple products or when people give it to their pets. "The theme of the day is data, specifically about dosage, interactions and why are you putting this in products, and unfortunately, I don't think anybody is giving good answers to that," Jonathan Havens, co-chair of the cannabis law practice at Saul Ewing Arnstein & Lehr, told CNBC. Friday's hearing highlighted the polarizing viewpoints on CBD. Some people praised the compound as a great discovery of our lifetimes, and others warned it could expose consumers to unnecessary and possibly lethal risks. Most speakers agreed the FDA should establish at least some oversight over the manufacturing processes, quality assurance and labeling of CBD products. The hearing ended without a consensus on how the agency would move forward. Friday's public hearing was simply a listening session for the FDA. The agency will take public comments through July 2, and panelists encouraged presenters to submit more data.

Searching for answers

James Shults of Wildflower, a company that sells CBD products, including soaps and topicals, told FDA panelists that consumers need to trust the products they're buying are safe. He said he plans to submit a citizen's petition requesting regulation allowing CBD to be used in dietary supplements. Lowell Schiller, principal associate commissioner for policy and co-chairman of the FDA's CBD working group, asked what the functional purpose of adding CBD to beauty products is. Shults said he's not "100%" on the science. Schiller asked what Shults means when he says "effective." "It delivers a more, a higher sense of personal attraction," he said. "It's more desirable in the product, not through clinical definitions but consumer opinion." Andy Snyder, who writes e-letter Manward Press, criticized the FDA for acting too slowly on regulating CBD, saying most Americans will view CBD like Vitamin C or other common drugs or vitamins. Schiller asked whether Snyder was familiar with any data on CBD use in children and whether he's supportive of it. Snyder said he's a publisher, not a scientist, but he wouldn't give CBD to his children. "Would you give your son or daughter Vitamin C?" Schiller asked. "I would," Snyder replied. Schiller asked Susan Cromer, who owns retailer LilyHemp, what actions she takes to prevent youth access. Cromer said she requires shoppers to be at least 21, an age limit she set based on the minimum age to buy alcohol.

Possible risks

Scientists warned regulators how little they know about CBD. Igor Grant, from the University of California, San Diego's Center for Medicinal Cannabis Research, presented research showing cannabis' efficacy varies based on how people consume it. For example, the body absorbs it much quicker when people vape CBD than when they eat it, he said. "If you're talking about putting some CBD salve on an elbow, maybe it helps, maybe it doesn't. We don't know," he said. Bill Gurley, professor at the University of Arkansas for Medical Sciences, presented a study that reviewed products in Mississippi labeled as containing CBD. The study found that numerous such products actually contained synthetic CBD. "This unregulated industry with high public demand and no requirements and oversight for quality that is skirting the edge of legality has ample room for nefarious activity," said Michelle Peace, an assistant professor at Virginia Commonwealth University who specializes in forensic toxicology. Some presenters held up quality issues as evidence of why the FDA needs to regulate CBD products. Betsy Booren, Grocery Manufacturers Association's senior vice president of science and technology, said the group and its members applaud the FDA for taking the first step in stakeholder engagement. The association represents large consumer products goods companies like Coca-Cola, PepsiCo, General Mills, Kellogg and Procter & Gamble. "As consumer interest for food, beverage, personal care and household products containing cannabis and cannabis derivatives continues to grow, the necessity for national uniform regulatory frameworks that protect public health is of critical importance," Booren said.

First step