Essences

Typically used at routine step 4.

An essence is the step most often skipped and least often explained. It is a lightweight, water-rich layer with a higher concentration of functional ingredients than a toner but less than a serum — fermented filtrates, mucin, amino acids and humectants are common. The realistic benefit is cumulative surface hydration and a smoother base for what follows, rather than a targeted correction of one concern.

Products

Advanced Snail 96 Mucin Power Essence product photograph

Editorial research review

COSRX

Advanced Snail 96 Mucin Power Essence

Not yet scored

A viscous essence built around 96.3% snail secretion filtrate, with humectants and soothing ingredients. It provides a hydrating, glossy layer but is not suitable for vegan users or anyone with a snail-related sensitivity.

100ml

View details Amazon UK

Editorial research review

VT COSMETICS

PDRN 100 Essence

Not yet scored

A rich, milky essence using ginseng-derived plant PDRN alongside niacinamide, ceramides, panthenol and emollients. It provides a moisturising glow and may function more like an emulsion than a water-light essence.

30ml

View details Amazon UK

How we research essences

We currently track 2 published products here. Every entry is compiled from manufacturer ingredient disclosures, published cosmetic science literature and UK retailer listings. We do not run clinical trials, and we do not publish a product until its formulation details have been checked against a source we can cite.

Formulation: INCI lists, key actives, fragrance and alcohol status where the brand discloses them.
Evidence: what the published research suggests for the key ingredients, and what it does not establish.
UK availability: retailer listings and prices, with the date each was last checked. Where a price is not recent enough to quote, we say “check latest price” instead of guessing.

Results from cosmetic products are formulation-dependent and vary between people. Read our review methodology, browse the ingredient explainers or compare options in the comparison tool.

Choosing essences

Add an essence when your routine is already stable and hydration is the gap.
It is not a substitute for a treatment serum if you have a specific concern.
Texture matters more than the marketing term; read what the layer actually is.

For a full step-by-step order for your skin type, see the routine guides. To narrow by skin type and concern, use the product finder, or browse every step on the product types index. Scoring is explained in our review methodology.