When it comes to protecting your skin and preventing premature ageing, daily sun protection is the most important step in any skincare routine.
Our skin is the only organ that is regularly exposed to the elements and considering 90% of skin ageing is caused by environmental damage, with most of this damage coming from the sun, it is critical to protect your skin 365 days a year.
At Elizabeth Harris Medical Cosmetics on the Isle of Wight, one of the most common pieces of advice I give everyone is simple: wear a broad-spectrum SPF every day, all year round.
Many people associate sunscreen with summer holidays or hot weather, but sun damage occurs every day, even in the UK. In fact, research suggests that around 90% of visible skin ageing is caused by environmental damage, and the vast majority of this is due to exposure to ultraviolet (UV) radiation from the sun.
If you are investing in professional skincare products or advanced aesthetic treatments but not protecting your skin with a daily SPF, you will be undermining the results you are working so hard to achieve.
Daily SPF helps to protect your skin from premature ageing, pigmentation, sun damage and long-term skin health concerns.
Understanding UV Damage: UVA vs UVB
To understand why daily sun protection matters so much, it helps to know the difference between the two main types of ultraviolet radiation that affect our skin: UVA and UVB.
Both types can damage the skin, but they affect it in different ways.
UVA Rays – The Main Cause of Skin Ageing
UVA rays make up around 95% of the UV radiation that reaches the Earth’s surface and are present at consistent levels throughout the year, even during cloudy weather.
Unlike UVB rays, UVA penetrates deep into the skin, where it contributes to many of the visible signs of ageing.
UVA exposure is linked to:
- Fine lines and wrinkles
- Loss of firmness and elasticity
- Pigmentation and uneven skin tone
- Long-term skin damage
- Increased risk of skin cancer
One important thing many people do not realise is that UVA rays can pass through clouds, light clothing and even glass. This means your skin can still be exposed when you are driving, sitting near windows, or spending time indoors with natural light.
For this reason, UVA protection should be part of your skincare routine every day, not just when you are outside in the sun.
UVB Rays – The Cause of Sunburn
UVB rays account for about 5% of the UV radiation that reaches the Earth.
These rays affect the outer layers of the skin and are most strongly associated with:
- Sunburn
- Direct DNA damage in skin cells
- Increased skin cancer risk
UVB radiation tends to be stronger during summer months and around midday, which is why sunburn is more common at these times.
Why Broad-Spectrum SPF Is So Important
A sunscreen labelled “broad spectrum” protects against both UVA and UVB radiation.
This is crucial because while UVB may cause visible sunburn, UVA damage happens silently and builds up gradually over time, leading to premature ageing and long-term skin damage.
When choosing a sunscreen, I recommend looking for:
- SPF 30 or higher for daily protection
- Clear UVA protection labelling, such as:
- “Broad Spectrum”
- The UVA symbol inside a circle (commonly used in the UK and EU)
- A PA rating found on some international sunscreens
Using a high-quality broad-spectrum SPF every morning is one of the most effective ways to protect your skin’s health and maintain the results of aesthetic treatments.
Mineral vs Chemical Sunscreen: Which Is Better?
When choosing sunscreen, many people ask whether mineral or chemical SPF is better. Both types can provide excellent protection when used correctly.
The main difference is how they work on the skin.
Mineral Sunscreen (Physical Sunscreen)
Mineral sunscreens use ingredients such as zinc oxide and titanium dioxide.
These filters sit on the surface of the skin and reflect or scatter UV rays away from the skin.
Benefits of mineral sunscreen
- Often well tolerated by sensitive skin
- Suitable for rosacea-prone or reactive skin
- Zinc oxide offers excellent broad UVA protection
- Generally considered more environmentally friendly
Things to be aware of
- Some formulas can leave a white cast, particularly on deeper skin tones
- The texture may feel slightly thicker or creamier
Tinted mineral SPF formulas can help reduce the appearance of this whitening effect.
Chemical Sunscreen (Organic Sunscreen)
Chemical sunscreens use filters such as avobenzone, octisalate, octocrylene and homosalate, along with newer filters like Tinosorb and Uvinul.
These ingredients work by absorbing UV radiation and converting it into a small amount of heat, reducing the amount of UV reaching the skin.
Benefits of chemical sunscreen
- Often feels lightweight on the skin
- Typically leaves no visible residue
Possible downsides
- Some filters can sting the eyes or irritate sensitive skin
- Sunscreen should be reapplied every two to three hours, as UV exposure gradually breaks down the protection
Is SPF in Makeup Enough?
Many foundations, powders and tinted moisturisers now include SPF, which can be helpful as an extra layer of protection.
However, in practice most people do not apply enough makeup to achieve the SPF level listed on the packaging.
In addition, many makeup products do not provide sufficient UVA protection.
For the best results, it is recommended to:
- Apply a dedicated broad-spectrum sunscreen first
- Treat SPF in makeup as additional protection rather than your main source
How to Apply SPF Correctly
Using the correct amount of sunscreen is essential for effective protection.
For daily use, I recommend:
- Applying SPF every morning as the final step of your skincare routine
- Using two finger lengths of product for the face and neck
- Reapplying every two hours if you are outdoors, sweating, or exposed to direct sunlight
Consistency is the key to protecting your skin and preventing premature skin ageing and pigmentation.
Choosing the Right SPF for Your Skin
At Elizabeth Harris Medical Cosmetics on the Isle of Wight, I stock the full range of AlumierMD mineral sunscreens, including tinted, untinted and oil-free formulations.
These advanced mineral SPFs provide broad-spectrum UVA and UVB protection, while also helping defend the skin from environmental stressors such as pollution and blue light from digital devices.
They act as a daily protective shield, helping to maintain healthy skin and protect your results from professional treatments.
Untinted Mineral SPF
Untinted mineral SPF may appear slightly lighter on the skin, particularly on medium to deeper skin tones.
It is often ideal for:
- Very fair skin tones
- Clients who prefer a completely natural sunscreen finish
- Anyone who plans to wear makeup on top
- Those who prefer no shade matching
Tinted Mineral SPF
Tinted formulas blend more easily into the skin, helping to counteract the natural whitening effect of mineral filters.
They are particularly popular for:
- Medium to deeper skin tones
- Clients who prefer a “no-makeup makeup” look
- Those wanting a more even-looking complexion
Many tinted mineral sunscreens contain iron oxides, which can help protect the skin against visible light and blue light. This can be especially beneficial for individuals prone to hyperpigmentation, melasma or post-inflammatory pigmentation.
All AlumierMD mineral sunscreens also help protect the skin against blue light and environmental pollutants.
If you would like to purchase an AlumierMD mineral sunscreen online please click here for the website link.
Personalised SPF Advice at Elizabeth Harris Medical Cosmetics
Every skin type is different, which is why choosing the right sunscreen can make a significant difference in how consistently you use it.
At Elizabeth Harris Medical Cosmetics on the Isle of Wight, I work with my patients to recommend the most suitable SPF based on their skin type, tone and specific concerns, whether that is acne, sensitivity, dryness, oiliness or pigmentation.
When you find a sunscreen that works well for your skin and feels comfortable to wear, you are far more likely to apply it daily — and that is what truly protects your skin in the long term.
I also offer a Full Skin Health Analysis with my Observ 520x – please click here to learn more and to book your consultation – click here.
I look forward to seeing you at my clinic very soon.
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