Regulatory authorities in the US may step up efforts to control Internet marketing of food products after Ocean Spray Cranberries were forced to remove unapproved health claims about its juices on the company website.    The Food and Drug Administration (FDA) took action last month after Ocean Spray asserted that its juices "may help the body fight cancer" or "may help lower cholesterol" on its website. The FDA concluded that the company promoted its drinks as if they were medications, going beyond the scope of the types of claims that are permitted on foods