SKIN TYPES

our Skin:

Everything you need to know about the body’s largest organ — from its three-layered architecture to the five main skin types and how to care for each.

What is skin?

Skin is the human body’s largest organ, covering approximately 1.5 to 2 square metres in adults and accounting for roughly 15% of total body weight. Far more than a simple covering, it is a complex, dynamic system that acts as our first line of defence against the outside world.  Composed of multiple layers of specialised cells, skin continuously regenerates itself — shedding and replacing around 30,000 to 40,000 dead skin cells every hour. Over the course of a lifetime, the average person sheds about 40 kilograms of skin.    Skin renews itself completely every 28 to 30 days. This cycle slows with age, which is why regular exfoliation becomes increasingly important as we get older.

The three layers of skin:

Skin is structured in three primary layers, each with distinct roles and cell types.

1  Epidermis — the outer shield

The outermost layer, the epidermis, is what we see and touch. It contains melanocytes (which produce pigment determining skin colour), keratinocytes (which form the protective barrier), and Langerhans cells (part of the immune response). The epidermis has no blood vessels and relies on the layer beneath for nutrients. Its bottom layer constantly produces new cells that migrate upward, harden, and eventually shed.

2  Dermis — the structural core

Beneath the epidermis lies the dermis, a thicker layer of connective tissue containing collagen and elastin fibres that give skin its strength and elasticity. The dermis houses hair follicles, sweat glands, sebaceous (oil) glands, blood vessels, lymph vessels, and nerve endings. It is responsible for sensation — touch, pressure, pain, and temperature perception all originate here.

3  Hypodermis — the deep foundation

The deepest layer, also called subcutaneous fat or subcutis, consists mainly of fat and connective tissue. It acts as an insulator, regulating body temperature, cushioning organs against impact, and anchoring the skin to underlying muscles and bones. It also stores energy and absorbs vitamins, serving as a reservoir for the body.

Key functions of skin

Skin performs several vital functions that go well beyond mere appearance:

Protection – Acts as a physical and chemical barrier against bacteria, viruses, UV radiation, and environmental pollutants.

Thermoregulation – Sweat glands and blood flow to the skin help the body maintain a stable internal temperature.

Sensation – Millions of nerve receptors detect touch, pain, heat, cold, and pressure, relaying signals to the brain.

Vitamin D synthesis – When exposed to UVB rays, the skin converts cholesterol into vitamin D, essential for bone and immune health.

Immune defence – Langerhans cells in the epidermis detect foreign invaders and trigger immune responses when needed.

Hydration balance – The skin barrier prevents excessive water loss from the body, maintaining internal moisture levels.

The five main skin types :

Dermatologists typically classify skin into five types based on oil production, hydration levels, sensitivity, and pore size. Understanding your skin type is the foundation of any effective skincare routine.

BALANCED…

Normal skin

Well-balanced in oil and moisture. Pores are small, texture is smooth, and blemishes are rare. This skin type is neither too oily nor too dry and requires minimal intervention to stay healthy.

Sebum-rich..

Oily skin

Overactive sebaceous glands produce excess sebum, leaving a shiny appearance — especially on the T-zone (forehead, nose, chin). More prone to enlarged pores, blackheads, and acne breakouts.

Moisture-lacking..

Dry skin

Produces less sebum than normal, leading to a tight, rough, or flaky texture. May appear dull and is more prone to fine lines and irritation. Needs consistent moisturisation and gentle cleansing.

Mixed zones..

Combination skin

Features both oily and dry zones on the same face — typically an oily T-zone and dry or normal cheeks. The most common skin type globally, requiring a targeted, zone-specific approach to care.

Reactive..

Sensitive skin

Reacts easily to products, weather, or environmental triggers with redness, burning, itching, or stinging. Often has a weakened

Skin type is not fixed. Hormones, climate, diet, age, and lifestyle all influence sebum production and hydration — your skin type can shift across seasons and life stages.

How to identify your skin type

The simplest method is the bare-face test: cleanse your face with a gentle wash, pat dry, and wait 30 minutes without applying any products. Then observe:

Shiny all over – Oily skin — sebaceous glands are overproducing sebum across the entire face.

Tight or flaky – Dry skin — insufficient moisture and sebum production, often with a dull or rough texture.

Shiny nose/forehead only – Combination skin — oily in the T-zone, normal or dry on the cheeks and jaw.

Comfortable and clear – Normal skin — no visible oiliness, tightness, or irritation after cleansing.

Redness or stinging – Sensitive skin — skin reacts to the cleansing itself, indicating a compromised

Alternatively, the blotting paper test can confirm oiliness: press a sheet to different areas of your face after 30 minutes. Oil on all areas = oily; oil only at the T-zone = combination; little to no oil = dry or normal.

General skincare principles for all types ;

Regardless of skin type, a few universal habits form the backbone of healthy skin:

1 ) Cleanse twice daily

Morning and evening cleansing removes pollutants, excess oil, and dead cells without stripping the skin’s natural moisture barrier. Match the cleanser to your skin type — gel for oily, cream for dry, micellar for sensitive.

2 ) Moisturise consistently

Even oily skin needs moisture. Hydration prevents the skin from overproducing sebum to compensate for dryness. Choose lightweight, non-comedogenic formulas for oily types and richer creams for dry skin.

3 ) Apply SPF every day

UV radiation is the leading cause of premature ageing, hyperpigmentation, and skin cancer. A broad-spectrum SPF 30 or higher should be applied every morning, regardless of weather or skin type.

Beyond the basics, staying hydrated, eating antioxidant-rich foods, getting adequate sleep, and managing stress all directly impact skin health. The skin reflects what happens internally just as much as what we apply topically.