The nutrition superstore chain GNC is firing back against a lawsuit that claims it sold supplements spiked with synthetic drugs.
The Oregon attorney general's office says GNC advertised nearly two dozen fitness products as all natural when some of the products contained a prescription drug used in Russia.
Attorney General Ellen Rosenblum is going after GNC for allegedly misrepresenting 22 workout and fat-burner supplements.
The state's lawsuit claims some products contained two synthetic drugs: Picamilon, a prescription drug in Russia used to treat a variety of neurological conditions, and BMPEA, a chemical similar to amphetamine that is associated with certain types of strokes.
The attorney general says GNC knew both are considered unlawful dietary ingredients.
GNC has come under scrutiny before.
In March, the company agreed to stricter testing of herbal supplements after a New York attorney general investigation revealed some did not actually contain any of the herbs on the label.
"Companies that manufacture or sell herbal supplements have a responsibility to make sure their product contain every ingredient that's on the label and do not include ingredients that are not on the label,” New York Attorney General Eric Schneiderman said.
This time the retailer is fighting back.
GNC told ABC News the Oregon attorney general's accusations are "without merit."
GNC also said it stopped selling all products that contained Picamilon and BMPEA.