Final answer:
The FTC required a label change for the herbal ingredient comfrey to ensure truth in advertising and prevent misleading health claims.
Explanation:
The FTC required a label change for the herbal ingredient comfrey based on the need for truth in advertising. The FTC aims to prevent misleading health claims and ensure that all information provided is truthful and not misleading.
Learn more about FTC regulations on herbal ingredients here:
https://brainly.com/question/28733673
