The U.S. Food and Drug Administration (FDA) today announced that it last week led a raid on Norcross, Georgia dietary supplement manufacturer Hi-Tech Pharmaceuticals. During the raid, U.S. Marshals seized more than 1,500 cases of weight loss products. The goods, along with more than 1,200 pounds of raw manufacturing materials and substances, have an estimated retail value of around $2 million.

According to the FDA, the supplements being manufactured by Hi-Tech contained 1,3-Dimethylamylamine HCL (DMAA) – an unapproved food additive in the U.S. The FDA considers the substance to be unsafe for consumption, as it has been linked to high blood pressure and other cardiovascular issues. The substance could, according to the FDA, be even more dangerous when used with caffeine.

The FDA stated that it did find raw DMAA ingredients in bulk at Hi-Tech’s manufacturing facilities.

“This company has a responsibility to ensure its products are safe for distribution and human consumption,” said Melinda Plaisier, associate commissioner for regulatory affairs at the FDA. “We have taken action to protect consumers and demonstrate our commitment to their safety by keeping these products from entering the distribution system.”

The FDA’s raid was conducted following a an investigation that began in October. The agency found that 11 products manufactured by Hi-Tech contained DMAA, including brands with names such as Black Widow, Yellow Scorpion, Fastin, and Liprodrene. On November 1, the FDA issued an order to hold the supplement products until the seizure took place.