That’ shouldn’t be even legal. The stuff doctors and dentists got away with back then was horrendous. I’m not sure how old you are but when we were kids we ate a lot of candy, especially me.
I loved those slow pokes, caramel apples, toffee candy. They caused cavities. No surprise there . One year I had 3 huge cavities so my parents told our dentist to not give any freezing so from that day we had to get cavity drillings down with no freezing.
My parents thought it would stop us from eating so much candy but we ate it anyway. In fact, I ate more than ever and had many fillings come out. I’ also started keeping some of the Sunday School money to buy ‘more’ toffee candy. I became a rebel early.

lol