Found in mushroom gummies
- A Portland gummy labelled with lion’s mane, reishi and cordyceps extracts plus a “proprietary microdosed nootropic blend” contained Δ9-THC, cannabidiol, cannabidivarin, cannabichromene and cannabinol (van Breemen et al., 2025).
- Another Portland study found undisclosed Δ9-THC in a gummy marketed as nootropic (Correia et al., 2025).
Unexpected THC matters because people don’t know to expect its effects, and THC is on standard drug-test panels (see drug tests).
What poison-centre data show
- US poison centres recorded 5,022 cases involving delta-8, delta-10 THC or THC-O acetate in 2021–2022. 94% were ingestions, 30% involved children under 6, and 38% had a serious medical outcome (Burgess et al., 2024).
- Reports of children under 6 eating cannabis edibles rose from 207 in 2017 to 3,054 in 2021, and 22.7% of these children were admitted to hospital (Tweet et al., 2023).
What we don’t cover yet
Federal and state rules for hemp-derived THC products were changing in 2026. We’ll add guidance once we’ve checked the final federal position against the statute.
Sources
- van Breemen RB, Simchuk D, Fritzsche B, Huson D, Kuzdzal SA, Ferguson J. Active Constituents of Psilocybin Mushroom Edibles. JAMA Netw Open. 2025;8(9):e2531345.
Tested 12 'magic mushroom' edibles (11 gummies, 1 chocolate) bought at retail shops in Portland, Oregon. None contained psilocybin. Eight contained active ingredients not disclosed on the label: psilocin (3), synthetic tryptamines mipracetin and 4-HO-DET (2), caffeine (1), kava extract (1) and cannabis extract including Δ9-THC (1). Four had no active ingredient detected. Muscimol and muscarine, listed on one label, were not detected in any product.
- Correia MS, Gonzaga MJ, Temple C, Gerona RR. Quantitative analysis of recreational psychoactive mushroom gummies in Portland, Oregon. Clin Toxicol (Phila). 2025;63(4):261-266.
Eight gummy products from seven Portland, Oregon smoke and vape shops, analysed by LC-QTOF-MS. Neither ibotenic acid nor muscimol was found in the two products claiming Amanita muscaria; seven of eight contained psilocin and six contained 4-AcO-DMT. One product labelled psilocybin-free tested positive for psilocybin; one 'nootropic' product contained undisclosed Δ9-THC; kavalactones were also detected.
- Burgess A, Hays HL, Badeti J, Spiller HA, Rine NI, Gaw CE, et al.. Delta-8 tetrahydrocannabinol, delta-10 tetrahydrocannabinol, and tetrahydrocannabinol-O acetate exposures reported to America's Poison Centers. Clin Toxicol (Phila). 2024;62(4):256-266.
5,022 US poison-centre cases involving delta-8, delta-10 THC or THC-O acetate in 2021–2022; 94% were ingestions, 30% involved children under 6, and 38% had a serious medical outcome.
- Tweet MS, Nemanich A, Wahl M. Pediatric Edible Cannabis Exposures and Acute Toxicity: 2017-2021. Pediatrics. 2023;151(2).
Edible cannabis exposures in children under 6 reported to US poison centres rose from 207 in 2017 to 3,054 in 2021; 22.7% of children were admitted to hospital.