When I first looked up psyllium husk powder as a fiber supplement, people were complaining that it made the water thick and gross. That enticed me to buy it. And when the packaging said to drink immediately after mixing lest it thicken, I instead let it sit for a good 15 minutes until my glass of water had a smoothie-like consistency. Makes me love drinking water again and also sad that I can’t have it with every glass of water or else I get stopped up.
OK, so - gross, but I sorta feel this way about drinking water with ground flax seeds mixed in? I will drink a glass of water with 2 tablespoons (15 mL) of ground flax seeds, and it actually tastes good!
I don’t have to let it sit or anything.
I found psyllium husks were a bit like eating sawdust, but I found the psyllium husk powder easier to choke down, but neither were anywhere as good or tasty as ground flax seeds.
I bet chia seeds would also work for letting soak and make a smoothie / gel / thick consistency - you might try that out too? (Chia seeds are also a great source of soluble fiber!)