How Psychoactive Chocolate Bars Evaded Regulations and Hit Store Shelves
This is not the first instance where psilocybin-laced products have been discovered in Denver. In January 2026, a Denver food and cannabis investigator grew suspicious of PolkaDot-branded chocolate bars positioned alongside convenience store energy shots and nicotine pouches.
Widespread Problem Across States
Months earlier, California public health officials had issued warnings about PolkaDot-branded chocolate bars. California authorities destroyed over US$3 million worth of the chocolate after laboratory testing revealed added synthetic psychoactive drugs. The agency cautioned about severe illness, hospitalization, or even fatalities—especially among children who might mistake the bars for ordinary candy.
Unfortunately, the California case highlighted a more extensive issue. In Denver, investigators from the Colorado Department of Public Health & Environment and Denver Licensing and Consumer Protection warned consumers and removed these products from three retailers. They subsequently collaborated with the Denver Police Department to destroy similar products from six additional retailers.
As a natural products pharmacologist and professor based in Colorado who has studied the emergence of known and novel psychoactive substances in consumer products, I conducted investigations to determine how these items landed on shelves and how dietary supplement loopholes initially allowed them to evade detection by licensing authorities.
False Labels Mislead Retailers and Consumers
The PolkaDot-branded chocolate bars were marketed as "mushroom blends" and claimed to include lion's mane, reishi, turkey tail, and cordyceps—all non-hallucinogenic varieties. However, laboratory tests told a different story. The bars contained psychoactive drugs: psilocybin and psilocin, the principal psychedelics found in Psilocybe mushrooms, along with other chemical relatives called synthetic tryptamines.
"We didn't want any one retailer to feel singled out," explained Jessica Davis, Denver health department's food and cannabis investigator, in an interview. "We simply asked if they were carrying any mushroom blends. Most didn't know they contained hallucinogenic mushroom compounds."
This is not the first occurrence of psilocybin-laced products being found in Denver. In the summer of 2025, tobacco licensing authorities warned consumers about the same issue with West Coast Gold Caps chocolate bars. Additionally, in late 2024, Colorado was among 34 states where the U.S. Centers for Disease Control and Prevention reported hospitalizations and suspected deaths linked to Diamond Shruumz chocolate bars and gummies.
Understanding PolkaDot Products
PolkaDot products resemble everyday treats: 2-ounce chocolate bars in multiple flavors, gummies, and even liquid "shots" or seltzers. They are advertised as containing a blend of non-hallucinogenic mushrooms. These items are often sold in natural foods stores as nutritional supplements, despite limited clinical evidence for their health benefits.
According to public advisories, PolkaDot bars in Denver contained chemicals prohibited in retail food products. PolkaDot brand materials, including the paper wrapping of the chocolates—but not the chocolates themselves—are widely available online. This means there is no single regulated manufacturer of the chocolate. Instead, multiple unconnected players can purchase packaging kits and fill them with whatever compounds they choose. Consequently, the composition of the same PolkaDot-labeled product can vary significantly across the U.S.
Davis, the food safety investigator, noted that gas station retailers frequently produced apparently factual invoices from wholesalers, but the paperwork rarely verified what was actually inside the bars. "Wholesalers weren't doing their due diligence," she said. "Some said they found these at trade shows and were told they were legal."
Clarifying Colorado's Legal Framework
Much of the confusion among wholesalers and consumers stems from Colorado's 2022 Natural Medicine Act. Voters approved Proposition 122, leading to the state's decriminalization of personal possession, cultivation, and sharing of certain natural psychedelic substances. Thus, while individuals are free to grow, share, and use "magic mushrooms," it remains unlawful to sell them.
Colorado is also developing a system for licensed facilitators to offer supervised use of hallucinogenic mushrooms for various mental health issues, but the law did not authorize over-the-counter retail sales at gas stations, smoke shops, or corner stores. "People assume that because Colorado decriminalized natural medicines, anything 'mushroom' is fair game to buy. It isn't. Retail sales are prohibited," Davis emphasized.
Regulatory Loopholes and Enforcement Challenges
So-called natural or herbal medicine products, such as chamomile for relaxation and echinacea for colds, are regulated in the U.S. as foods—not drugs—under the Dietary Supplement Health and Education Act of 1994. Retailers are free to sell products as long as the label does not make false or misleading medical claims or contain unapproved or illicit drugs. The Food and Drug Administration issues formal warning letters to prohibit sales when products are misbranded, spiked with unapproved drugs, or when adverse reactions occur in consumers.
Psilocybin and some semi-synthetic tryptamines are prohibited under Schedule I of the Controlled Substances Act of 1970, governed by the U.S. Drug Enforcement Administration. However, some synthetic tryptamines found in PolkaDot-branded bars are not explicitly named in this most restrictive classification, although the main building block, diethyltryptamine (DET), is. Some slightly modified psychoactives in PolkaDot products are presumed by the DEA and other authorities to circumvent the law.
Small gas station convenience stores purchase products from dozens of regional wholesalers. PolkaDot chocolates and other items can slip into local gas stations and evade detection. In contrast, GNC, a national health and nutrition company, manufactures many of its own products and receives others from a select few wholesalers. These retailers tend to have better knowledge of what's in the products they carry.
"If you keep [these products] under the FDA's radar—in small gas stations rather than doing a mass distribution at GNC—you avoid detection until something really bad happens," Harvard physician Dr. Pieter Cohen told STAT News.
By avoiding federal detection, the identification of problematic products falls to local and regional public health officials, food inspectors, and tobacco licensing authorities. If they discover these products, they can revoke food or tobacco licenses, potentially causing extensive financial losses due to the low profit margins of gasoline sales alone.
Education and Enforcement Efforts
The Denver health department's messaging has emphasized consumer education and retailer outreach. Advisories urge residents to avoid purchasing PolkaDot products and to report sightings to 311 or via the city's consumer protection portal so inspectors can track their spread. The department has also highlighted that businesses selling unlawful products face fines, license suspension or revocation, and potential criminal penalties.
According to Davis, Denver's licensing team has begun coaching retailers on basic due diligence: Does the price point make sense for a legitimate product? Can the wholesaler connect the retailer to the manufacturer? Can the manufacturer provide clear, complete ingredient disclosures and testing documentation? If clerks or suppliers cannot answer conclusively, that's a red flag.
The practical reality is that routine sweeps will not catch every mislabeled mushroom product. Denver relies on the public to report what they see. "If you're seeking natural medicine, we want you to do it safely," Davis advised. "Cultivate it yourself within the law, obtain it from someone you trust, or work with a licensed facilitator. Don't buy mystery bars at a gas station."
