Phytosphingosine

A lipid that is a component of the skin's barrier, helping to condition and strengthen it. Phytosphingosine, a naturally occurring long-chain sphingoid base, serves as a crucial precursor in the endogenous synthesis of essential skin ceramides (e.g., ceramide NP and AP) within the stratum corneum, thereby reinforcing and restoring the skin's barrier function. It also exhibits direct antimicrobial activity against common skin pathogens like *P. acnes* and *S. aureus* by disrupting bacterial cell membranes. Additionally, phytosphingosine possesses anti-inflammatory properties, modulating immune responses and inhibiting the release of pro-inflammatory cytokines, which helps reduce skin irritation and support overall skin health.

The Cosmetic Ingredient Review (CIR) Expert Panel assessed phytosphingosine and its derivatives as safe for use in cosmetic formulations. It is generally well-tolerated and has a low potential for irritation or sensitization at typical use concentrations.

Look for products with 0.005-0.2% (most active formulas typically use 0.05-0.1%). for clinical efficacy.

Phytosphingosine can be used with General guidance. Ceramides are excellent after exfoliation. They repair and strengthen the skin barrier that acids temporarily weaken.

Phytosphingosine can be used with Niacinamide. Both strengthen the skin barrier through different mechanisms. Together they're the ultimate barrier repair combo.

Phytosphingosine can be used with Retinoids. Ceramides help counteract retinoid dryness. Apply ceramide moisturizer after retinoid for better tolerance.

Phytosphingosine can be used with AHAs (Glycolic, Lactic, etc.). Glycolic acid + ceramides is a smart pairing. The acid exfoliates while ceramides immediately repair the barrier.