June 11, 2010 12:20 am HealthWatch: Dangers of K2 A new over-the-counter herb is being used by teens to get high, but its effects are far from safe. US & World Videos 6:16 NBC10 legend Lu Ann Cahn has a message for young women about breast cancer 4:04 Get sun safety tips ahead of Melanoma Monday 1:49 New guidelines say women should be screened every other year for breast cancer starting at 40 3:54 Project HOME celebrates 35 years helping people in Philly 2:31 Keith Jones, Erin Coleman swing for the fences at Phillies' ballpark. How did they do?