| Clue | Source | Date |
|---|---|---|
| Acid in preservatives | Wall Street Journal | 23 Apr 2022 |
| Food preservative acid | Wall Street Journal | 19 Jan 2019 |
| Food preservative acid | ||
| ___ acid (food preservative) | Wall Street Journal | 24 Oct 2015 |
| ___ acid (food preservative) | ||
| ___ acid (food preservative) | ||
| Acid used as a preservative | ||
| Acid used in food preservatives | ||
| Acid derived from mountain ash berries | ||
| Fruit-derived acid | ||
| Fruit-derived acid | ||
| ___ acid (preservative) | ||
| Kind of fruit acid | ||
| Of an acid. |