THC

(Newser) - A new synthetic substance that mimics the high of marijuana—and is legal—has American teenagers buzzing. But the herb-based substance, known as K2 or Spice, is giving health authorities the willies because its ingredients and effects are largely unknown. It's made in Asia and sold online and in some...

(Newser) - The “fake weed” sweeping the US isn’t marijuana, but it packs a stronger punch—and it’s legal. “K2” or “spice” is a mix of herbs and a chemical compound that’s sold as incense at—coincidentally, we’re sure—the same price as real pot....

(Newser) - Marijuana’s average potency, as measured by the concentration of psychoactive component THC, has broken 10% for the first time after decades of steady increase, a government report says—and is expected to keep increasing, CNN notes. Potency will likely plateau at some 15% in the next 5-10 years, though...

(Newser) - Michael Phelps' lungs—those that secured him enough Olympic gold to start a mint—are made for a stupendous high, reports Slate. They hold twice the smoke of an average human's, speeding up his THC absorption. But at his size (6-foot-4 and 195 pounds), Phelps needs a lot more weed...