A taste of OA won't hurt you at all! I did not see a smiley :) at the end of your line OK, for the record, I do not recommend tasting oxalic acid, unless you are tasting it in spinach, chard, pepper, rhubarb, etc. The 3.5% solution tastes like strong lemonade. If you were inadvertently to taste a little OA solution, it wouldn't hurt you in the least (no kidding). You've got to eat a fair amount for a long time for kidney stones. Read the toxicological references in my article. Randy -- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---