If the taste with all-in is really an issue, simply add splenda or sucralose to it. The sweetness balances the sourness. We added it to this last batch and now we get that it almost too sweet. Just trying to help you guys out. I dont want anyone bashing the product saying they cant take it when its a very tolerable product, IMO, compared to other stuff Ive tried. Trying to mask agmatine and citrulline isnt the easiest either, especially when not trying to use fillers, etc to cover the taste. Have you tried adding more water?