Why Vaseline Isn't Just Grease
Petrolatum: Barrier repair and antimicrobial responses underlying this "inert" moisturizer.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Petrolatum activates pro-inflammatory genes (IL6, IL8, IL1B) despite being labeled an inert, non-medicated ointment.
People assume petrolatum is passive—just a sealant—but this shows it triggers immune signaling pathways typically associated with active treatments like steroids or calcineurin inhibitors.
Practical Takeaways
Apply petrolatum daily to eczema-prone areas—even when skin looks normal—to support barrier repair and reduce hidden inflammation.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Petrolatum activates pro-inflammatory genes (IL6, IL8, IL1B) despite being labeled an inert, non-medicated ointment.
People assume petrolatum is passive—just a sealant—but this shows it triggers immune signaling pathways typically associated with active treatments like steroids or calcineurin inhibitors.
Practical Takeaways
Apply petrolatum daily to eczema-prone areas—even when skin looks normal—to support barrier repair and reduce hidden inflammation.
Publication
Journal
The Journal of allergy and clinical immunology
Year
2016
Authors
T. Czarnowicki, Dana Malajian, S. Khattri, Joel Correa da Rosa, Riana Dutt, R. Finney, N. Dhingra, Xiangyu Peng, Hui Xu, Y. Estrada, Xiuzhong Zheng, P. Gilleaudeau, M. Sullivan-Whalen, M. Suárez-Fariñas, A. Shemer, J. Krueger, E. Guttman‐Yassky
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Claims (5)
Petrolatum works the same way on normal skin and on eczema skin that looks okay — it boosts germ fighters and barrier proteins, which may explain why it helps even when the skin doesn’t look broken.
Putting petrolatum on your skin seems to turn up the production of natural germ-fighting chemicals, which might help protect against infections.
Petrolatum may help thicken the outermost layer of skin and boost proteins that keep it strong and sealed, like repairing a leaky roof.
Even on skin that looks normal in people with eczema, putting on petrolatum seems to reduce the number of immune cells that cause inflammation.
Even though petrolatum is thought to be just a plain ointment, it seems to turn on some of the skin’s natural alarm signals like IL-6, IL-8, and IL-1β, which are involved in fighting germs and healing.