As more states decriminalize recreational use of marijuana and expand its medical applications, concern is growing about inconsistent and inaccurate dosage information listed on many products, including brownies and other edibles. But now scientists report that they have developed a technique that can more precisely measure cannabis compounds in gummy bears, chocolates and other foods made with marijuana. They say this new method could help ensure product safety in the rapidly expanding cannabis retail market.

The researchers present their work today at the 251st National Meeting & Exposition of the American Chemical Society (ACS).

SAN FRANCISCO (KGO) -- Thanks to changing federal and state regulations, the marijuana industry in California is booming. And now women are taking the lead and breaking through the "grass ceiling.

Weed, pot, marijuana, Mary Jane, no matter what you call it - the sale of legal cannabis is growing fast.

Industry leaders expect sales to soar from $2.5 billion in 2014 to as much as $8 billion by 2018 and women are staking claim to many of those new businesses.

"Women are natural healers," Andrea Unsworth said. "We're the people who are typically in your home when you are sick, you know you go to mom."

How to make pot seem as all-American as an ice-cold beer.

Colorado cannabis regulators on Monday recalled medical and recreational marijuana grown by two cannabis businesses — RR Services and Advanced Medical Alternatives — over concerns the plants were grown with unapproved pesticides.

The recalls, called health advisories by the state, are the tenth and eleventh holds announced by the Colorado Marijuana Enforcement Division in less than one month.

The advisories note that 42 batches of RR Services’ marijuana and 10 batches of Advanced Medical Alternatives’ cannabis each tested positive for myclobutanil, a fungicide considered “slightly hazardous” by the World Health Organization and a “Bad Actor” by the Pesticide Action Network.

The marijuana industry may be growing rapidly, but if you don't know these critical points, your investment in marijuana stocks could go up in smoke.

It may not rank up there next to Social Security or Medicare, but marijuana is getting itself a lot of coverage this election season -- and for good reason.

The Meehan family moved to Maine to have legal access to cannabis to treat Cyndimae's rare form of epilepsy, and she was able to attend school after the passage of legislation last year.

On her last day, Cyndimae Meehan did the things she loved.

She colored. She played. She took a nap in her father’s arms.

Cyndimae, whose fight for access to medical cannabis to treat a rare form of epilepsy brought her and her mother before legislators in Maine and Connecticut, died Sunday while sleeping on her father’s chest on the couch in their Augusta home. She was 13.

Because he’s a scientist, not a back-slapping venture capitalist, Mowgli Holmes loathes using the term networking to describe even the portion of his job that entails shaking hands in the cannabis industry. But it was networking that brought the chief scientific officer of Phylos Bioscience in Portland, Oregon, to Las Vegas in November 2014 to attend the Marijuana Business Conference and Expo—and to smoke a massive joint with one of the cannabis movement’s legends, Ohio lawyer Don Wirtshafter.

The weed business is booming.

In its annual report on the U.S. cannabis industry, Marijuana Business Daily predicts up to $44 billion in economic impact by 2020. To put that into some corporate context: it's roughly equivalent to the current market cap of Netflix (NFLX) or Caterpillar (CAT). Last year's report predicted $14 billion to $17 billion in impact for 2016. The publication has been producing the report since 2012.

Watching marijuana become legalized in a select handful of states over the past few years has been interesting and exciting for a number of reasons.

The first stab at getting a medical marijuana amendment on Ohio's ballot has failed, but organizers of the plan say they're not surprised.