neither bad nor good ...
This acid is found and used everywhere from cokes to blueprints, to candy to helping clean up our environment because it is so easy to react and because of it's acidic properties. Here are just some of citric acids uses.
Since citric acid IS an acid and a property of acid is a sour taste, citric acid is added to a lot of beverages and medications.
Citric acid is also the most widely used organic acidulate and pH-control agent. This is probably due to the fact that it is a WEAK acid. If it was a strong acid it would probably take out a couple teeth as you gulp it down in your soda. Its salt, sodium citrate, is another additive used in sodas. It is also used to control acidity in cookies, chocolates, cakes, and butter.
(International Food Information Council Brochure, FDA)