hey faith. taking black seed oil is in no way destructive to your GI in fact you can take it daily for the rest of your life and not have any ill health effects from it.
i've been on it for months at a time and on it now doing about
30 drops 3x/day. i'd do more but i'm on the highest potency black seed oil from the best provider around Blessed Seed Oil. don't get it from anywhere else but here if you ask me.
Black seed oil is a very potent antifungal it'll knock candida out real quick I've had personal experiences with going too fast on this stuff. also a very good antioxidant and anti-inflammatory.
the reaction people seem to get from this is from killing off the candida which we all have in more than small quantities if you've ever been on long term abx.
here's a good research paper on its efficacy against candida. as you can see i'm a big fan.https://www.sciencedirect.com/science/article/pii/s0944501316304475