Terrence Howard, Lindsay Lohan and Jim Carrey all have imbibed a tea from the Amazon (rain forest, not company) that also has made its way onscreen ('Wanderlust,' 'While We're Young'). Now, a critical mass of L.A.'s urban hippies are...

As the source of the most powerful natural hallucinogen known, salvia is drawing scrutiny from U.S. authorities who want to restrict this Mexican herb, now used recreation­ally by some. But neuro­scientists worry that controlling it before studies have determined...