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Thanks for commenting, Octaviaaah. At least I know that it's not just my particular brand. Perhaps all aguaje powder takes on that grainy texture. I guess I will just have to suck it up too, and get over it. I really don't like that scratchy feeling in the back of my throat, but it's not so bad I can't handle it, and I don't like taking capsules.
I take 2 teaspoons, so 10 grams too. I just put a 1/2 tsp in my bottle and I do it 4 times a day.