Is FD&C Blue No. 2 fungal acne safe?
FD&C Blue No. 2 is generally considered safe for fungal-acne-prone skin. Synthetic indigoid dye.
Also known as Indigotine, Indigo Carmine, CI 73015
Why this verdict
Synthetic indigoid dye.
Fungal acne, properly called malassezia folliculitis, is driven by a yeast that feeds on fatty acids in roughly the C11 to C24 range. An ingredient is a concern when it can supply usable fatty acids in that window, and it is generally fine when it cannot. Chain length and ethoxylation can both change the verdict, which is why the chemical family alone does not decide it. See the full trigger list and how we assess ingredients for the reasoning and sources.
Frequently asked questions
Is FD&C Blue No. 2 safe for fungal acne?
FD&C Blue No. 2 is generally considered safe for fungal-acne-prone skin. Synthetic indigoid dye. This is informational only and not a diagnosis; suitability varies by person and formulation.
Why is FD&C Blue No. 2 considered fungal-acne safe?
Synthetic indigoid dye. Fungal acne (malassezia folliculitis) is driven by ingredients that supply fatty acids in roughly the C11 to C24 range that the yeast can metabolize; FD&C Blue No. 2 is assessed against that mechanism.
Assessed using: FDA 21 CFR 74.1102.
This page is informational only and is not medical advice or a diagnosis. Fungal acne can resemble other skin conditions, and ingredient suitability varies by person and by formulation. Verdicts reflect community-reported data and malassezia lipid research, not a guarantee for your skin. Always patch test and consult a qualified clinician.