Could occlusives stop water loss from your skin entirely?

Patricia Farris, MD

Moisturizers are composed of occlusives, humectants and emollients. The function of an occlusive ingredient is to form a barrier over the outer most layer of the skin, sealing water in. Occlusives do not stop water loss from the skin entirely, but they do a great job of keeping the skin hydrated. Common occlusives ingredients include petrolatum, waxes, lanolin, mineral oil and ceramides. Botanical oils of sunflower, soybean, jojoba and evening primrose also act as occlusives in moisturizers.

Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)

While water loss can be completely halted by an occlusive, once it is removed, water loss resumes at the same rate as before.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.