BHT
| Date | Clue |
|---|---|
| 2018-03-07 | Controversial food preservative, for short |
| 2016-10-23 | Food preservative abbr. |
| 2015-09-07 | Food preservative letters |
| 2013-12-31 | Food preservative, for short |
| 2003-08-14 | All-natural food no-no |
| 2000-07-22 | All-natural food no-no |
| 1999-12-30 | Common preservative |