“Given the paucity of data on metabolic significance of marijuana use, particularly among the black population, the objective of the study was to investigate the potential effects of marijuana on metabolic risk factors and body weight among black patients…

Current marijuana use is associated with significantly lower waist circumference, compared to former users and never users.

Except for diastolic BP that was significantly lower among current users, other metabolic parameters showed tendency towards favorable profile…

Our study on the cardio-metabolic effects on marijuana use among black population from an inner city institution showed consistent results on the association of marijuana use with lower waist circumference that has been demonstrated previously among populations that are largely white.”

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4523241/