Well ive been fighting my 3 dogs environmental allergies for a while now so i thought id try something new. i take vitamin c for my allergies and didnt realize how much it was doing till i recently stopped taking it by accident. wow did i have to increase my anti histamine usage and i was miserable till i figured out why. my pharmacist says its a natural histamine blocker. well im back on mine and am trying it on my dogs. 500mg once a day. i just started it saturday and was at the panthers football game yesterday so they didnt get any then. ive given them all doses today so i will report in a few days to see how they are doing. would be nice to be able to maybe get them off some of this benadryl ive been giving them. also want to see if it helps the hive situation with sarah. shes having one or two here and there. enviromental im sure so ill keep you posted on how it goes for those that are interested.