Since Indiana's new vaping law took effect, the number of legal manufacturers went from well over a hundredto seven.

The law passed last year and amended this year has given seven producers control of the Indiana market, shutting out dozens of other manufacturers that had operated in the state.

The law regulates the sale of e-liquids. It forces vape shops to purchase it from manufacturers that fit the standards set by the law.

The FDA says the rules are aimed at improving public safety and curbing teen use, but vape shops say they'll kill the industry.

Public health advocates told an Indiana legislative committee there's no scientific consensus on whether electronic cigarettes pose any health risks even as a growing number of youths are trying them.