We currently have one batch of Optimal Prenatal capsules that contains citric acid, due to a manufacturing error, while this product otherwise would not. The citric acid acts as a preservative normally (or for flavored products, as a flavoring enhancer), but only will appear in this single batch. The website will clearly note when this product is out of stock and the original formula will return to stock.
The citric acid is derived from non-GMO sugarcane. This product tests negative for yeast and mold.