Been thinking about this more. The two alternatives I have tried over the years have been Metamucil, and Fiber-con chewable tablets.
For me, the Metamucil worked much better, consistent, not overwhelming. That was while recovering from an appendectomy.
I started using Fibercon occasionally while traveling, because it seemed the side effect to long plane rides was a bit of getting stuck, partly because of dehydration. The fiber con worked, but not at all on a timely basis. If I started on a Sunday night before flying Monday, it wouldn’t kick in until Tuesday afternoon. And, you have to drink a lot of water, more liquid the you drink with Metamucil.
But (and this is anecdotal, I do not know for sure) one’s system can become dependent on Metamucil.
Overall, extra fiber in the shortNterm is one thing, but for long term Heath, consider eating some live culture yogurt or kefir or other probiotics to keep the gut flora healthy.