| 2026-03-08 | Mineral found in seaweed |
| 2026-01-12 | Reddish-brown antiseptic in a first-aid kit |
| 2025-10-29 | First aid stinger |
| 2025-03-20 | Common antiseptic |
| 2023-11-28 | I, on the periodic table |
| 2022-04-22 | What I might be in a lab? |
| 2022-02-15 | Element essential to thyroid function |
| 2021-01-03 | Liquid in a first-aid kit |
| 2020-10-06 | Element extracted from kelp |
| 2019-05-15 | First-aid antiseptic |
| 2017-01-22 | Thyroid need |
| 2016-10-18 | What I may stand for? |
| 2015-10-28 | Common antiseptic |
| 2015-10-25 | First-aid supply |
| 2015-08-04 | First-aid kit supply |
| 2013-07-16 | I, in chemistry |
| 2011-11-14 | Tincture of ___ |
| 2011-10-13 | Element in disinfectants |
| 2010-01-13 | First-aid item |
| 2010-01-05 | Antiseptic element |
| 2004-07-17 | Cut aid |
| 2003-01-26 | First-aid supply |
| 2001-05-26 | Hypothyroidism preventer |
| 1999-07-16 | Thyroid treatment |
| 1999-07-04 | First-aid item |
| 1999-03-14 | First-aid item |
| 1999-01-29 | Least active of the halogens |
| 1998-06-18 | Goiter treatment |
| 1998-05-01 | Scrape treatment |
| 1996-08-17 | Medical tracer, at times |
| 1996-08-04 | Goiter sufferer's need |
| 1995-12-02 | Common antiseptic |
| 1994-06-25 | First-aid kit item |