I know that ingesting St John’s Wart has been found to reduce birth control’s effectiveness, but if it’s a listed ingredient in a toothpaste should I not use it? My boyfriend’s mom brought me some herbal toothpaste from Bulgaria, and it’s listed but I don’t think there’s much in it. You’re also supposed to rinse well so I wouldn’t swallow any. Do you think I’d still absorb it to some extent, is it not worth the risk? If I used it during my 4-day placebo week I though maybe that would be ok, but the internet is telling me conflicting things about how long it can stay in the body (1 day or multiple weeks). What do you think? Should I just avoid the risk altogether?