False Advertising: This involves making untrue or misleading claims about a product or service. California's Business and Professions Code § 17500 prohibits advertising that is false or misleading in any way.Contact the Attorney General's Public Inquiry Unit to report a complaint about a business or if you have questions or comments. Seek help from a competent lawyer expert in consumer protection. If you've experienced false advertising or deceptive marketing practices, you should first talk to a lawyer about your case. Marketing campaigns from companies pushing sugarrich foods and drinks don't mention those risks. Under California false advertising laws, companies are prohibited from using deceptive advertising in connection with the sale or dissemination of goods. This is where advertisements compare their products to competitors in a misleading way.