The words and the evidence have to match
A health claim is a specific sentence, not a general sense that the science is supportive. In the UK, nutrition and health claims have to be authorized for that type of product, or the brand has to be able to show why the line is allowed. A paper about an ingredient, at a different dose, in a different product, does not automatically make the sentence in the video true.
What a video does to the science
A creator shortens the line. A caption drops the qualifier. On-screen text turns “contributes to” into “fixes.” The science did not change. The claim did. That is the version a viewer hears, and the version a regulator can assess.
A practical test
Write down the exact words in the video. Ask whether those words are an approved claim for this product, in this market, at this dose. If the answer is only “the research is promising,” the line is ahead of the evidence. This is not a scientific review, and it is not legal advice.

