THC (Cannabis / Marijuana)
THC is the active compound in cannabis (marijuana), including smoked, vaped, and edible forms.
Detection window: Detectable for about 3 days after occasional use, but up to 30 days or more with heavy daily use, at a 50 ng/mL screening cutoff.
Prescriptions: Some legal CBD products contain enough THC to cause a positive result.
How Testr tests for it
This panel is part of every Testr visit. A certified collector handles the collection at your home, checks specimen temperature, and reads a clinical 14-panel cassette on the spot. For measured levels rather than a positive/negative read, add laboratory confirmation: a CAP-accredited lab quantifies the result by LC-MS/MS, with measured levels on the report.