Have you tried oral probiotics? Did you find them effective?

Have you tried oral probiotics and seen any effects?

I really get tempted every time I see an advertisement, haha.

My somewhat young son just woke up, and his bad breath is really strong ㅠㅠ

Brushing, gargling, and even using a tongue cleaner, but stillㅠㅠ

My husband or I don't particularly know, but my son is especially severe.

If it's okay to swallow the pill, I would like to try giving it once~