A Massachusetts man known for his infomercials touting the purported health benefits of coral calcium and Supreme Greens has pleaded guilty to tax and consumer fraud charges.

Federal prosecutors say Donald Barrett of Plymouth pleaded guilty on Monday to failing to report $573,000 in income from one of the products he sold on television and for marketing a product touted as preventing cancer and arthritis without approval of the Food and Drug Administration.

The 36-year-old Barrett faces up to three years in prison at sentencing scheduled for July 27. The Salem News reports that he is only expected to receive a year under terms of a plea agreement.

Barrett and his lawyer declined to comment after court.