This site lists this specific sixth item directly: realistic marketing language — claims that avoid promising guaranteed results for everyone.
This site is direct that transparent marketing avoids promising guaranteed results for everyone — worth reading this item as a tone-and-wording check, distinct from the five preceding items, which focus on factual label content.
This site separately labels its own eight stated benefits as general advantages, not independently verified medical outcomes — worth reading that framing as this site applying its own sixth checklist item to its own content.