psyllium-husk

I used to eat/drink it, I must say it worked for me.  2-3 spoons in a glass and fill the rest with water, stir.  Make sure to drink fluids….it feeds off it.

 

https://www.healthline.com/health/psyllium-health-benefits?m=2#Overview1

Tomato juice

tomato juice seems to help a few people.  Drink the non-concentrate and 100%, read the label to make sure.  I say 2 glasses or so, monitor and adjust.