Depending on the situation and condition. Im a shop consultant majoring in health and nutrition, so I do have the knowledge on analysing someone's health condition and recommend supplements for them based on their condition.

For example, if someone having diarrhoea and stomachache will usually consume medication like
1. Carbon/Charcoal pill
2. Diphenoxylate hydrochloride

For me, I will substitute it with
1. Aloe Juice
2. Fiber with L-Glutamine and Probiotics

Just remember not all supplements made the same. So be a smart consumer, buy what gives you the most value out of it. Read labels on the supplements before buying it.

If anything you would like to figure out on how to improve your health condition with supplements, im more than happy to suggest to you.

Cheers and stay safe!