Vitamin C (in the form of sodium ascorbate powder), which acts as a natural antihistamine, may also be introduced when allergies are suspected. (second-opinion-doc.com)
Helpful when the body needs acidifying is sodium ascorbate powder (or ascorbic acid), which comes very concentrated. (shirleys-wellness-cafe.com)
Personally, I prefer to use Sodium Ascorbate form (I use this one) since it has less of an affect on the pH, but either form will work. (wellnessmama.com)