>>3117
weed speeds up your metabolism, smoking it often can lead to weight loss.
source: http://www.ncbi.nlm.nih.gov/pubmed/367234
>. Smoked marijuana caused an increase in metabolic rate that also peaked after 15 min. Pretreatment with propranolol completely abolished the increase in hypercapnic ventilatory response, but did not affect the other changes. Thus, smoked marijuana had stimulatory effects on metabolic rate, ventilation, and the ventilatory response to CO2. The latter appears to be mediated by the beta sympathetic nervous system.
Though, nothing can truly combat a shit diet and lack of exercise. You'll be fat if you eat a lot regardless.