Technically speaking, bioavailability is the amount of a molecule or chemical that is readily available in the bloodstream. In terms of the consumption of CBG and CBD products, bioavailability features three stages: Onset, peak, and duration. Onset is the length of time required for the molecule to begin having an effect on the consumer. Peak is when the effects of a molecule or chemical are greatest, often in the middle of its overall duration. Duration is the total length of effect of a molecule. Different paths of consumption result in vastly different bioavailability.