Having a standard dose will make it simpler to analyze THC-related cannabis studies, which has become a top priority for the NIDA as well as the National Advisory Council on Drug Abuse. “It is not the intent of this Notice to prescribe the quantity of THC that is permissible for use in research projects. Indeed, investigators are free to use more or less than 5mg of THC as appropriate for their study. However, for applicable studies, investigators will be required to report the quantity of THC using the standard unit. Investigators may also report the quantity of THC in other units (e.g., milligrams) as appropriate,” reads the notice.