My mom ran a daycare in our home for most of my childhood. She had Flintstone vitamins for some of the kids, but she wouldn't let me have any. Not knowing what they were for, I asked her one day. For whatever reason, she told me they were to make you hungry so you would eat all of your meals and since I already did that, even if she gave me some (which she did), they wouldn't do anything.
I believed this well into high school.
A childhood belief about general

others believed things like this
- I used to belief sloths lived in trees outside my childhood home. My older sister told me so.Anon
- When I was young, I honestly believed that I would die before I reached high school. Anon
- One kid I know believed that because I wear glasses, it wouldn't hurt if he poked my eye.Anon
- My mother told me when i was 5 that Santa wouldn't come if i kept sucking my thumb. — Traumatized
- In primary school, a whole bunch of kids including me believed that watermelon seeds contained ants. — Caff
- I used to belief that the crusts on bread had more vitamins— mims