In the first prospective study of synthetic cannabinoids or SCs — the group of chemicals that mimic the effects of marijuana — researchers have found that symptoms of depression, drinking alcohol, or using marijuana was linked to an increased risk of SC use one year later. (sciencedaily.com)
Nevertheless, they conclude: «This is the first prospective study to show that alcohol and smoking are associated with the development of visible age - related signs and thus generally looking older than one's actual age... This may reflect that heavy drinking and smoking increases general aging of the body.» (sciencedaily.com)