Ceramides

Ceramides are lipid molecules that make up approximately 50% of the skin's outermost layer (stratum corneum). They form a protective barrier that locks moisture in and keeps irritants, bacteria, and pollution out. Think of them as the "mortar" between the "bricks" (skin cells) of your skin barrier.

Healthy skin has a high concentration of ceramides. When ceramide levels drop — due to age, harsh cleansers, exfoliation, or skin conditions like eczema and rosacea — the barrier becomes compromised. This leads to transepidermal water loss (TEWL), dryness, sensitivity, and increased susceptibility to irritation and infection.

There are 9 identified ceramides in human skin (Ceramide 1–9, also known as AP, EOP, NG, NP, NS). Most skincare products contain a mix of synthetic or plant-derived ceramides. Look for products that list multiple ceramide types (e.g., Ceramide NP, Ceramide AP, Ceramide EOP) for the best barrier repair.

• **Cholesterol** and **Fatty Acids** — the ideal ceramide ratio mimics the skin's natural lipid composition (3:1:1 ceramides:cholesterol:fatty acids). The brand Stratia's Liquid Gold is famous for this ratio. • **Niacinamide** — boosts ceramide synthesis naturally. • **Peptides** — support collagen and barrier repair. • **Humectants** (hyaluronic acid, glycerin) — draw water in; ceramides seal it. • Avoid using with harsh foaming cleansers that strip the barrier.

Absolutely everyone, but especially: • Dry or dehydrated skin • Eczema, psoriasis, rosacea • Over-exfoliated or damaged barrier • Ageing skin (ceramide production declines with age) • Anyone using retinol or strong actives (ceramides support barrier recovery) Ceramides are non-irritating, non-comedogenic, and safe for all skin types.