I use True Lemon (or lime, or orange even) It contains: Citric Acid, Lactose, Lemon Juice, Lemon Oil, Maltodextrin, and Ascorbic Acid. I don't have much problem with any of those ingredients, but I admit, I use it mostly as a convenience and because with mayo, it helps to control the amount of moisture in the suspension. I think I've found it in Market Basket, Roche Bros and Donnelans.