Can medicine capsules have an adverse effect on your health over time?

I know that there are hard capsules and soft gelatin capsules, and that once you take them they dissolve and release medication. However, I've been told to take vitamins as a tablet or tea as much as possible because over time, capsules can have an adverse effect on your stomach and overall health (regardless of whether you have an allergic reaction to the capsule or not). On the flip side, I've read that some types of soft gelatin capsules can actually be good for you because they contain protein. I'd like to understand more about this. Honestly, it wouldn't be the first time something was marketed as being "safe," but actually could cause harm later on. Both beliefs sound logical, but which bit of info is more accurate? Are they both accurate to a certain extent?

Capsules are mostly made of gelatin which has been consumed by the public over a very long time. One would assume that any serious danger would have appeared a long time ago. That is not to say however that the ingredients in the capsule are always safe nor that an individual batch of capsules couldn't be contaminated.

Maybe u should research the exact supplement u want to take. See if any adverse reactions for that dose & manufacturer are reported. It will still depend on ur body.