They called them "risk free trials", but they were deceptive in several ways according to the Federal Trade Commission. The FTC and the Maine Office of the Attorney General have banned the marketers of CogniPrin and FlexiPrin supplements from tricking people into auto-enrollment and making false health care claims.
According to the FTC, marketers disguised 30-minute radio ads as educational talk shows to push the supplements, making deceptive claims on the health benefits of CogniPrin and FlexiPrin. The agency said there was no proof to back up the claims. When people called to enroll in the "risk-free offer", the FTC said they were auto-enrolled, and charged for products they didn't sign up for, and cancelling was a hassle.
If you were deceptively enrolled or overcharged and the company refuses to refund your money, the FTC suggests contacting your credit card for a reversal. If you were charged for a free trial offer, you should contact the FTC.