Vaseline is pure petrolatum, and pure petrolatum is a rich emollient and FDA-approved skin protectant. For some unknown and unsubstantiated reason, petrolatum has attained a negative image in regard to skin, despite solid research to the contrary. Topical application of petrolatum can help restore, soothe and moisturize skin’s outer layer. It’s widely considered safe and highly effective. In fact, extensive clinical data has shown petrolatum to be a gentle ingredient.
References for this information:
Acta Dermato-Venereology, November-December 2000, issue 6, pages 412-415
Journal of the American Academy of Dermatology, March 1992, issue 3 part 2, pages 387-396