"If it's not USDA Organic certified, and it's not full panel lab tested, you have no way of knowing what you're getting," said Cranford, who's been producing CBD long before it was en vogue.

"Overseas they use hemp to do cover crops. They use it to purposely suck out the pesticides and heavy metals on soil there so they can plant food crops next," Cranford said. "These crops are being imported into the US and people are making CBD out of it. The really scary part is when you have these contaminants in your plant material, and you make this oil, you're concentrating it."

After thousands of tests, 70 percent of products were found "highly contaminated" with heavy metals like lead and arsenic, herbicides like glyphosate (the active ingredient in RoundUp) and a host of other contaminants including pesticides, BPA and toxic mold.

Virginia Commonwealth University, the Journal of the American Medical Association, and other medical journals have published studies that reflect similar outcomes to the hundreds of tests done by Ellipse Analytics, citing contamination, false labeling and false claims.