The ingredient, explained
Potassium Iodide
A retrospective study examined potassium iodide for inflammatory skin disorders.
Ingredient guide
What it is and what it does
Potassium iodide
About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗
- Antimicrobial
- A technical role associated with controlling microorganisms on skin.
Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗
Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.
A closer look
What the research shows
Human oral research
About one-third were assessed as improved.
What this does not tell us
Small uncontrolled heterogeneous oral medical series, not cosmetic efficacy.
Sources for this summary. PubMed 30463069 ↗
Research review checked Oct 1, 2026
Read exact local candidate abstracts first; select identity-relevant papers; targeted primary PubMed/publisher searches. This is not an exhaustive systematic review.
Ingredient research is not proof that a product containing this ingredient works.
Read the 1 selected study
Human oral research · n=35
Potassium Iodide for Cutaneous Inflammatory Disorders: A Monocentric, Retrospective Study. ↗
Dermatology (Basel, Switzerland) · 2019
Follow the formula
Products containing this ingredient
From the wider catalogue. Linked by the ingredient list, without an efficacy ranking.
Names and identifiers
Registry identity
Potassium iodide
- INCI name on ingredient lists
- POTASSIUM IODIDE
- CAS registry number
- 7681-11-0
- EC number
- 231-659-4
Other recorded names (1)
- kalii iodidum
Sources for this ingredient record
- EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗ · ODbL 1.0 (Open Beauty Facts database) · Recorded Aug 8, 2026