Sodium chlorite and chlorine dioxide are both toxic it just depends on how much you take of them. They are toxic in that they are both oxidizers, good in small amounts but bad in large amounts. Drink a whole bottle of Miracle-Mineral-Supplement and it could kill you by the amount of oxidation.
lemon and lime juices have a little C but the tiny amount in a few drops to a teaspoon isnt enough to stop the acidity activating the Miracle-Mineral-Supplement , it is used up instantly