Is there THC in bowl resin?

Yes, bowl resin can contain THC, which is the psychoactive compound found in cannabis. When smoking, some of the THC from the cannabis is not fully consumed and can accumulate in the resin left in the bowl. This resin can vary in potency, depending on how much THC was in the original cannabis and how often the bowl was used. However, the resin may also contain other compounds and impurities from the combustion process.