@Mee - have you tried psyllium husk for that?
I have a relative who has IBS and they swear by it. They were buying
metamucil? which is extraordinarily expensive, considering it is
almost entirely psyllium husk too but flavoured artificially and with some additives that are not the effective ingredient.
Now for about one tenth of the price, so a couple of dollars
here, they purchase it a bag without the additives and gain the same benefits without the expense.
Also, I have found to help keep the engine room purring I need to drink heaps of water whilst on Keto. Are you drinking enough because it is really easy to not drink enough water regardless of diet.