This is the first article in the LJO Explains series — a glossary of cosmetic terms, decoded honestly. Because understanding what is on your label is the first step to understanding what is on your skin.

The language of skincare can feel like a foreign dialect. Emollient. Humectant. Occludent. Keratolytic. These words appear on packaging, in ingredient lists, and in dermatological literature — but rarely come with a plain-language explanation.

Understanding them matters. Not because you need a degree in biochemistry to wash your face, but because knowing what a product is designed to do — and what your skin actually needs — puts you in control of the choices you make every day.

At Le Joyau d'Olive, we believe that knowledge belongs to everyone. Here is the first instalment of our plain-language glossary — the terms that describe how cosmetic products function on the skin.

Emollient

What it means: An emollient is an ingredient that softens and smooths the skin by filling the microscopic gaps between skin cells in the outer layer — the stratum corneum. Think of the skin's surface as a brick wall: the skin cells are the bricks, and the natural lipids (fats) between them are the mortar. When skin is dry or damaged, the mortar breaks down, gaps appear, and the skin feels rough, tight, or flaky. Emollients replace and reinforce that mortar.

Common emollients: Oils, butters, fatty acids, esters, and waxes. In natural skincare, plant-derived oils are among the most effective emollients available.

Le Joyau d'Olive: Virgin olive oil is one of nature's finest emollients. Its fatty acid profile — rich in oleic acid (omega 9), linoleic acid (omega 6), and palmitic acid — closely mirrors the natural lipids found in human skin. This compatibility is why olive oil soap has been used on sensitive and dry skin for thousands of years. It does not sit on the skin's surface; it integrates with it.

Humectant

What it means: A humectant is an ingredient that attracts and binds water molecules, drawing moisture either from the deeper layers of the skin or from the surrounding environment into the outer skin layer. Humectants work by creating a water-retaining reservoir in the skin — helping it stay hydrated longer.

Common humectants: Glycerol (glycerin), hyaluronic acid, urea, aloe vera, honey, and certain plant sugars.

Why it matters: Humectants are particularly important in dry climates, heated indoor environments, and for skin conditions like eczema and psoriasis where the skin's natural moisture-retention mechanism is compromised.

Le Joyau d'Olive: The cold saponification process we use produces glycerol naturally as a by-product of the reaction between olive oil and sodium hydroxide. This glycerol remains in our finished soap bars — a natural humectant that helps the skin retain moisture after washing. Industrial soap manufacturers typically extract and sell this glycerol separately; we leave it where it belongs.

Occludent

What it means: An occludent is an ingredient that forms a protective physical barrier on the skin's surface, slowing or preventing Transepidermal Water Loss (TEWL) — the evaporation of water through the skin. Unlike humectants, which attract water, occludents seal it in.

Common occludents: Petrolatum (petroleum jelly), mineral oil, beeswax, lanolin, silicones, and certain plant waxes.

The balance: Effective moisturisation often involves all three functions — humectant (attract water), emollient (smooth and soften), occludent (seal it in). Many high-performance moisturisers combine all three types of ingredients.

Important nuance: Occludents can be too occlusive for oily or acne-prone skin — they may trap sebum and contribute to congestion. The right occludent depends entirely on skin type.

Exfoliant

What it means: An exfoliant is an ingredient or tool that removes dead skin cells from the surface of the skin, revealing fresher, smoother skin underneath. There are two types:

  • Physical exfoliants — manual abrasion using particles, grains, or tools (scrubs, brushes, cloths)
  • Chemical exfoliants — acids or enzymes that dissolve the bonds between dead skin cells without physical abrasion. The most common are AHAs (alpha-hydroxy acids such as glycolic and lactic acid) and BHAs (beta-hydroxy acids such as salicylic acid)

Why it matters: The skin naturally sheds dead cells approximately every 28 days — a process called desquamation. As we age, this cycle slows. Regular exfoliation can improve skin texture, brightness, and the absorption of other skincare products.

Important caution: Over-exfoliation is one of the most common skincare mistakes. Stripping the skin too frequently damages the skin barrier, increases sensitivity, and can paradoxically worsen the conditions it is meant to improve.

Keratolytic

What it means: A keratolytic ingredient softens and breaks down keratin — the structural protein that makes up the outer layer of the skin. This loosens hardened, thickened, or flaking skin, making it easier to shed. Keratolytics are a more targeted form of chemical exfoliation, often used for conditions like psoriasis, keratosis pilaris, and calluses.

Common keratolytics: Salicylic acid, urea (at higher concentrations), lactic acid, and alpha-hydroxy acids.

Astringent

What it means: An astringent is an ingredient that causes the contraction of skin tissue — most notably pores and oil glands — giving the skin a tighter, smoother appearance and temporarily reducing oiliness.

Common astringents: Witch hazel, tea tree oil, rose water, zinc compounds, and certain plant tannins.

Important distinction: Astringents are often confused with toners — but not all toners are astringents. Astringents specifically have a contracting, pore-tightening effect. Overuse can strip the skin's natural oils and disrupt the skin barrier, particularly in dry or sensitive skin types.

Le Joyau d'Olive: Several of our essential oils — including Green Tea and Pine — have mild natural astringent properties, helping to tone the skin and tighten pores as part of the cleansing process.

Sebostatic

What it means: A sebostatic ingredient reduces the production of sebum — the natural oil produced by the skin's sebaceous glands. Excess sebum production is associated with oily skin, acne, and certain scalp conditions.

Common sebostatics: Niacinamide, zinc, green tea extract, and certain plant-derived compounds.

Why balance matters: Sebum is not the enemy. It is a natural and necessary component of the skin's barrier function. The goal of sebostatic skincare is not to eliminate sebum but to regulate its production — bringing it into balance rather than suppressing it entirely.

Comedogenic vs. Non-Comedogenic

What it means: A comedogenic ingredient or product has a tendency to block pores, potentially leading to comedones — the blocked follicles that manifest as blackheads and whiteheads. Non-comedogenic products are formulated to avoid this.

The comedogenic scale: Ingredients are rated on a scale from 0 to 5 — where 0 means no likelihood of pore blockage and 5 means highly likely. This scale, while useful, is not absolute — individual skin response varies significantly.

Le Joyau d'Olive: Virgin olive oil has a comedogenic rating of 2 — low to moderate. For most skin types it is entirely non-problematic. For very acne-prone skin, we recommend our Green Tea Mystique or Pine Charisma variants, both of which have natural sebostatic and purifying properties that offset any potential for congestion.

Soothing / Demulcent

What it means: A soothing or demulcent ingredient calms and relieves irritated, inflamed, or sensitive skin — creating a protective film over the skin surface that reduces discomfort and supports recovery.

Common demulcents: Aloe vera, oat extract, chamomile, calendula, allantoin, and certain plant mucilages.

Le Joyau d'Olive: The oleic acid in virgin olive oil has well-documented anti-inflammatory and soothing properties. Combined with the natural glycerol from our saponification process, our soaps are inherently calming — making them suitable for skin that other cleansers have irritated.

Vulnerary

What it means: A vulnerary ingredient promotes the healing of wounds, cuts, and abrasions on the skin surface.

Common vulnerary ingredients: Calendula, lavender essential oil, vitamin E, aloe vera, and zinc oxide.

Le Joyau d'Olive: Lavender Whisper — our lavender essential oil variant — contains linalool and linalyl acetate, compounds with well-documented vulnerary and antimicrobial properties. Lavender has been used in wound care for centuries.

Cicatrisant

What it means: A cicatrisant ingredient promotes the formation of scar tissue and supports the skin's repair process — helping wounds heal with minimal scarring.

Common cicatrisants: Rosehip oil, lavender, helichrysum, and certain vitamin C derivatives.

Depigmenting / Brightening

What it means: A depigmenting or brightening ingredient reduces the appearance of dark spots, uneven skin tone, and hyperpigmentation by inhibiting melanin production or accelerating the turnover of pigmented skin cells.

Common brightening ingredients: Vitamin C, niacinamide, kojic acid, arbutin, and certain plant extracts including liquorice root and bearberry.

Toning

What it means: In cosmetic terminology, toning refers to firming and tightening the visible appearance of skin — reducing the look of sagging or loss of elasticity. Not to be confused with skin toners (liquid products applied after cleansing).

Common toning ingredients: Caffeine, retinol, peptides, and certain plant-based antioxidants.

Le Joyau d'Olive: Pine Charisma and Green Tea Mystique — two of our most popular soaps — are particularly valued for their natural toning properties. Pine leaf oil is rich in antioxidants that support skin firmness, while green tea polyphenols are among the most studied natural compounds for anti-aging and toning benefits.

In Summary

Understanding how skincare ingredients function gives you the power to choose products based on what your skin actually needs — rather than what the front of the packaging tells you it needs.

The most effective skincare routines are often the simplest ones: a product that cleanses without stripping, moisturises without congesting, and supports the skin's natural barrier rather than disrupting it.

That is what Le Joyau d'Olive has been doing since 1804 — long before any of these words existed.

This is part of the LJO Explains series — a glossary of cosmetic terms, decoded honestly.
Next in the series: LJO Explains: Antioxidant, Peptide, Polyphenol — Decoding the Actives in Your Beauty Products