It's a type of lipid, a so-called sphingoid base that can be found naturally in the upper layer of the skin. It's found both in "free-form" and as part of famous skin lipids, ceramides.

There is emerging research about Phytosphingosine that shows that it has antimicrobial and cell-communicating properties and is considered part of the skin's natural defense system.

A 2007 study showed that Phytosphingosine even works against evil acne-causing bacteria, Propionibacterium acnes and shows promise as a complementing active ingredient in treating acne-prone skin thanks to its anti-inflammatory and antimicrobial activities.  

A nice one to spot in the ingredient list. :)

Show me some proof

  • International Journal of Cosmetic Science, June 2007, Anti-microbial and -inflammatory activity and efficacy of phytosphingosine: an in vitro and in vivo study addressing acne vulgaris

Products with Phytosphingosine

Kristina Holey + Marie Veronique Barrier Lipid Complex CeraVe Pm Facial Moisturizing Lotion IOPE Pore Clinic Tightening Essence Paula's Choice Resist Hyaluronic Acid Booster Cover fx Pressed Mineral Foundation Meishoku Ceracolla Perfect Gel CeraVe Healing Ointment CeraVe Pm Facial Moisturizer (Old Version - 2017) Paula's Choice Calm Redness Relief Repairing Serum Rosette Aqua Ceramide Gel Uriage Bariéderm Drying Repairing Cica-Spray Decubal Face Vital Cream Paula's Choice Resist Perfectly Balanced Foaming Cleanser Boots Boots Expert Dry Itchy Sensitive Treatment Aquation Daily Moisturizing Lotion CeraVe Foaming Facial Cleanser Paula's Choice Skin Balancing Pore-Reducing Toner Kiku-masamune Sake Emulsion Paula's Choice Clinical Ultra-Rich Moisturizer CeraVe Baby Wash & Shampoo CeraVe Feuchtigkeitscreme (Moisturizing Cream Eu Version) Rodan and fields Unblemish Dual Intensive Acne Treatment SkinCeuticals Retinol 1.0 Maximum Strength Refining Night Cream StriVectin Hyaluronic Dual Response Serum CeraVe Feuchtigkeitslotion (Moisturizing Lotion Eu Version) CeraVe Hydrating Cleanser CeraVe Hydrating Facial Cleanser CeraVe Skin Renewing Day Cream With Broad Spectrum Spf 30 Sunscreen Yuri Pibu Artichoke Power Essence CeraVe Renewing Sa Cleanser CeraVe Schäumendes Reinigungsgel (Foaming Facial Cleanser Eu Version) Neogen White Truffle Laycure Oil Stick Stratia Liquid Gold iS Clinical Sheald Recovery Balm CeraVe Daily Moisturizing Lotion Chemist Confessions Mr. Reliable Elizabeth Arden Advanced Ceramide Capsules Daily Youth Restoring Serum Paula's Choice Clear Oil-Free Moisturizer Simple Clear Skin Oil Balancing Moisturiser Simple Spotless Skin Anti-Blemish Moisturiser Summer Fridays Jet Lag Mask Paula's Choice Resist Pure Radiance Skin Brightening Treatment CeraVe Am Facial Moisturizing Lotion Spf30 CeraVe Baby Moisturizing Lotion CeraVe Moisturizing Cream Superdrug Simply Pure Hydrating Serum Bioderma Atoderm Intensive Baume Skinfood Premium Avocado Rich Toner Cover fx Total Cover Cream Foundation Spf30 Drunk Elephant C-Tango Multivitamin Eye Cream