By David Morrill and Rachel Raskin-Zrihen/MediaNews Group
Each year when high school prom gears up, Tim Massie can count on a handful of teenagers to use his store's tanning beds.
Earlier this month Gov. Jerry Brown signed into law a bill that prevents children under 18 from using the popular tanning method. The law, which hopes to reduce the risk of cancer, takes effect Jan. 1.
The idea that the government is limiting this customer segment irks Massie, who owns Iron Horse Nutrition in Pleasanton.