I almost made the mistake that makes most people give up on slippery elm for good.
I nearly ordered the first one I saw. Looked fine, decent reviews. Then I checked the label. Outer bark. And here's the thing nobody tells you: the mucilage, the gel that does all the work, is only in the inner bark. The outer bark is cheaper to source and cheaper to process, which is exactly why most of them use it. Buy one of those and you're swallowing tree powder with nothing in it.
That's why so many women try slippery elm, feel nothing, and decide it doesn't work. It does work. They just never had the right part of the tree.
It's the same with the loose powders. Taken on their own they break down in your stomach long before they ever reach the lining, which is the one place the damage actually is.
That's why I went with Kindora. Pure inner bark, in a capsule so it reaches your gut intact, and nothing else added to bulk it out. Just the part of the tree that does the job, and none of the part that doesn't.