Citric acid from Aspergillus nige…prehensive overview.

This is a review paper, not an experimental study, so there are no new test results. It compiled existing research on citric acid production from a fungus called Aspergillus niger—which is commonly used to make citric acid for cosmetics, food, and beverages. The review covers how the ingredient is made industrially and notes that genetic engineering techniques are being used to improve production efficiency.