Ingredient · dataset v56
Red 33 and fungal acne
No known trigger
Why it's not a known trigger
A synthetic azo colorant dosed in drops; no fatty chain, nothing Malassezia yeast can metabolize.
Colorants are judged by structure, not shade.
Evidence strength
Judged neutral — no trigger evidence
Function
Colorant
Also listed as
Acid Red 33, CI 17200, Red 33 Lake
Checked products with this ingredient (1)
Product types: Antifungal treatments
Antifungal treatments (1)
Related colorant
- Beta Carotene — No known trigger
- Bismuth Oxychloride — No known trigger
- Carmine — No known trigger
- Chromium Oxide Greens — No known trigger
- CI 19140 — No known trigger
- CI 28440 — No known trigger
- CI 42090 — No known trigger
- FD&C Yellow No. 6 — No known trigger
Sources
EU CosIng database — search the INCI name
Last reviewed: 2026-10-13 (dataset v56).
Questions
Does Red 33 trigger fungal acne?
No known trigger: A synthetic azo colorant dosed in drops; no fatty chain, nothing the yeast can metabolize.
Does Red 33 feed Malassezia?
No known link: Red 33 is judged with no known trigger. One screened ingredient is not a product verdict — when in doubt, ask a dermatologist.
Is this medical advice?
No. We screen ingredient lists; we never diagnose, treat, or certify products. When in doubt, ask a dermatologist.
Check a full list containing Red 33 →
Not medical advice: we screen ingredient lists for potential triggers — we never diagnose, treat, or certify products. Dataset v56.