mixing it with food is a good way. I typically do it in my water (usually cold). I shake it as well. If I have tea and the water is hot enough I've never had an issue with it dissolving. Another thing I noticed (not sure if this is good or bad) that if I let it sit long enough it dissolves on its own. However, it doesn't bug me to drink those little white floaty things if it doesn't dissolve either. But that is me.
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Re: trouble with the acacia fiber
If I have tea and the water is hot enough I've never had an issue with it dissolving. Another thing I noticed (not sure if this is good or bad) that if I let it sit long enough it dissolves on its own. However, it doesn't bug me to drink those little white floaty things if it doesn't dissolve either. But that is me. 
