Are low-THC or CBD products, the only products allowed?

No, but the extracts cannot contain more than 10 mg of THC per individual dose. In the context of Virginia's law, one “dose" is considered a single unit of a cannabis product, a single capsule, for example. One “dosage" is the number of doses that are to be taken at one time. 10mg is the standard single dose in most states and is psychoactive.