The provided article text does not contain the actual story about Abdul El-Sayed's Instagram admission — only the headline and a list of unrelated Daily Mail sidebar links to other news items. As a result, no verified details of what Abdul El-Sayed said, admitted or warned about are available from the supplied content.

Without the substantive body text, it is not possible to accurately report the specifics of his statement, the context behind it, or the nature of the "darker warning for teenagers" referenced in the headline. Reporting further detail would risk inventing facts not present in the source material.