Sunscreen: Why It Is the Only True Anti Ageing Product

Fine lines, uneven pigment, rough texture and loss of elasticity are all strongly linked to sun exposure, even when that exposure is accidental or incidental.

UVA vs UVB: what you need to know

There are two main types of ultraviolet radiation that affect the skin.

UVB

• This is the type of radiation that causes sunburn.
• It tends to be stronger in summer months and during peak daylight.
• It plays a role in DNA damage and skin cancer formation.

UVA

• This penetrates deeply into the skin.
• It is present all year, even on cloudy days, and it passes through glass.
• UVA is the main driver of collagen breakdown and photo ageing.

A broad spectrum sunscreen protects against both UVA and UVB. This is essential for preserving skin structure over time.

How sunscreen slows visible ageing

Daily sunscreen use reduces:

• Collagen loss
• Fine lines caused by ultraviolet exposure
• Pigmentation and uneven tone
• Development of sun spots
• Overall skin roughness

On a cellular level, sunscreen prevents the formation of reactive oxygen species that damage collagen and elastin. It also reduces inflammation and slows the repeated injury that leads to premature ageing.

Chemical or mineral sunscreen?

Both are effective. The best sunscreen is the one you will wear consistently.

Chemical filters

•  Lightweight and easy to wear
• Blend smoothly into the skin
• Good for daily use under makeup

Mineral filters

• Use zinc oxide or titanium dioxide
• Sit on the surface and reflect light
• Often preferred by sensitive or reactive skin

Modern formulas combine comfort with high protection, so you do not need to compromise.

How much to apply

Most people apply far too little.
You need approximately:

• One teaspoon for the face, neck and ears
• A full shot glass amount for the body

Reapply every two hours when outdoors, and daily in the morning when indoors.

‍Do you need sunscreen if you are mostly inside? Yes.

UVA passes through windows. It is present from sunrise to sunset. It does not cause sunburn, so you do not feel it, but it breaks down collagen quietly over time.

This is why daily sunscreen use is the foundation of any long term skin plan, regardless of weather.

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The take home message

Sunscreen is the only product proven to slow visible ageing in a significant and evidence based way. Everything else supports or enhances the process, but sunscreen is the essential step.

If you are committed to pro ageing, long term skin health and natural looking results, sunscreen is non negotiable. Everyday. 

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Written by Dr Brandon Kober-Brown MBBS, ProfDipMensHlth, GCCM

Registered Medical Practitioner (General Registration)MED0002581903