Look at regulated advertising / marketing on tobacco products as examples.

No ads on TV/Radio. Mandated warnings. In some countries, packaging must carry prominent health warnings, in some cases excluding virtually all branding (Australia, for example).

That along with high taxation, smoking cessation programs, legal proceedings against tobacco companies, restrictions on retailling, etc., have drastically reduced smoking rates in many countries.

<https://en.wikipedia.org/wiki/Tobacco_smoking#Public_policy>