I ate Lucky Charms with my kids while they were growing up. Both of them are in their 40’s with their own kids. I believe that cereals back then were more nutritious.
Remember when cereals were advertised as being “Part of a complete breakfast?” And they would show pictures of the cereal with toast, eggs and fruit? Of course no one actually had a compete breakfast. They just ate the cereal.
https://tvtropes.org/pmwiki/pmwiki.php/Main/AdjacentToThisCompleteBreakfast