If you want to create fruity sour taste to most of your meals, try adding some Citric Acid and achieve those things easy yet effective. Citric Acid is widely used to add some fruity yet sour taste to meals like beef stew, soft drinks and soups. Produced in China, expect high quality Citric Acid at a fraction of its cost. Use something different to uplift your meals such as Citric Acid. http://en.wikipedia.org/wiki/Citric_acid