For a THC edible to be both safe and enjoyable, the proper potency and dosage must be established ... Retrospective chart review. Can Pharm J (Ott). 2022 Apr 15;155(3):175-180.

An analysis of data from more than 1,300 participants aged 18 to 93 revealed these low-dose equivalents: Two puffs from a joint, pipe, or vaporizer. One 5 mg THC edible. A quarter dab of concentrate.

Edible products also come in different levels of THC and therefore each has different serving sizes. All of this complicates the ability to know and exact "dose" from one product to the next. Because ...

When I first began adding a bit of cannabis to my evening runs in 2012, edibles were wildly unpredictable in their dosage and effects, made up primarily of the leftover sugar trim from the plant.