Someone already hit on it. The 1938 Food Drug and Cosmetics
Act.
I would not expect each state to determine in advance if the product is so stated.
You, it would appear, be interested in buying tablets that do nothing, but which say Vitamin C, as long as you can sue.
The federal government has no constitutional power to regulate food. Regardless of Supreme Court ruling.
That law that every statist here is quoting was put into effect under the administration of FDR. You know, FDR, that conservative icon of freedom and limited government.
Just because it's been around for almost a century doesn't make it constitutional.
/johnny
No need to sue. Let’s imagine you and I buy ACME Vitamin C for $10 each bottle. On a lark we test it and find out it isn’t vitamin C what will happen?
1. We stop buying ACME brand and tell all our friends.
2. We could sue ACME under class action for damages.
3. 1. or 2. would end ACME as a company and vitamin producer.
4. The publicity would put other manufacturers on notice.
5. They’d respond by either leaving the market or using their true vitamin C content as a selling point backed up by a private testing lab - a la UL.
No government intervention, except a fair, swift and objective judicial system.