Daily Sunscreen and Sun-Aged Skin: What the Research Actually Says

Daily Sunscreen and Sun-Aged Skin: What the Research Actually Says

Sun exposure is part of everyday life in Auckland, and over time it shows up in how skin looks and feels. A growing body of peer-reviewed research has examined the role ultraviolet light plays in the visible signs of ageing, and what daily sunscreen use has been studied to do. Below is a plain summary of that evidence, with links to the original studies so you can read further.

How the sun shows up on your skin

Ultraviolet (UV) exposure is widely recognised as a major contributor to the visible signs of sun-driven skin ageing, such as the appearance of wrinkles and uneven pigmentation Clinical, Cosmetic and Investigational Dermatology, 2013. Researchers describe common features of this process as increased wrinkles, changes in melanin and irregular pigmentation, and other changes to the skin surface Inflammation Research, 2022. A 2025 review summarised these changes as wrinkles, loss of elasticity, uneven pigmentation, and other structural changes in the skin Cureus, 2025.

UVA, UVB and why broad-spectrum matters

Sunlight reaches the skin as a mix of wavelengths, and they do not all behave the same way. Broad-spectrum protection across both UVA and UVB is relevant because UVA penetrates more deeply into the skin and is associated with the breakdown of collagen that underlies sun-driven changes in skin appearance Cureus, 2025. The shorter-wavelength UVB is mostly absorbed by the outer layer of the skin, while the longer-wavelength UVA reaches into the deeper dermis Acta Dermatovenerologica Alpina, Pannonica et Adriatica, 2020.

What daily sunscreen use has been studied to do

Regular daily use of sunscreen has been studied for slowing the development of the visible signs of skin ageing, often called photoageing. A randomised trial reported that skin ageing over the study period was lower in people who used sunscreen daily compared with those who used it at their own discretion Annals of Internal Medicine, 2013. Reviews of the topic note that topical sunscreen use may help with the prevention of photoageing Acta Dermatovenerologica Alpina, Pannonica et Adriatica, 2020, and a year-long study of a facial broad-spectrum sunscreen also looked at changes from continued daily use Dermatologic Surgery, 2016.

Visible improvements reported in studies

Beyond prevention, daily use of a facial broad-spectrum sunscreen has been associated, in clinical studies, with visible improvements in the appearance of photoaged skin, including texture, clarity and the evenness of skin tone Dermatologic Surgery, 2016. In that year-long study, skin texture, clarity and pigmentation were among the most improved measures by the end Dermatologic Surgery, 2016. A separate 2024 pilot study of a broad-spectrum sunscreen with visible light coverage also reported a positive effect on measures of photoageing Journal of Cosmetic Dermatology, 2024.

Making it a daily habit

The most useful sunscreen is the one you will actually wear. A broad-spectrum SPF that feels comfortable, sits well under makeup or on its own, and suits your skin makes the daily step easier to keep up with. The research above consistently points to broad-spectrum coverage and regular, ongoing use rather than occasional application Annals of Internal Medicine, 2013.

At Verdo in Parnell we stock the Medik8 Advanced Day Ultimate Protect SPF 50+ as a broad-spectrum option for daily facial use. If you are not sure where to start or how a sunscreen fits with the rest of your routine, our team is happy to talk it through in store.

Disclaimer: This article is for general information only and is not medical advice. The studies cited are peer-reviewed and provided for educational context. Individual results vary. Speak with a qualified healthcare professional or dermatologist before changing your routine. Verdo Cosmetics makes no therapeutic claims about the products mentioned.

Frequently asked questions

Does sunscreen really affect how skin ages?
Peer-reviewed research has looked at this question. A randomised trial found that skin ageing over the study period was lower among people who used sunscreen daily than among those who used it at their discretion (Annals of Internal Medicine, 2013). UV exposure is widely described as a major contributor to the visible signs of sun-driven ageing such as wrinkles and uneven pigmentation (Clinical, Cosmetic and Investigational Dermatology, 2013). Results vary between individuals, so this is general information rather than a guarantee.
What does broad-spectrum mean and why does it matter?
Broad-spectrum means a sunscreen is formulated to help with both UVA and UVB. This matters because UVA penetrates more deeply into the skin and is associated with the breakdown of collagen that underlies sun-driven changes in skin appearance, while UVB is mostly absorbed by the outer layer of the skin (Cureus, 2025; Acta Dermatovenerologica Alpina, Pannonica et Adriatica, 2020).
How often should I apply facial sunscreen?
The studies that reported benefits looked at regular, ongoing daily use rather than occasional application (Annals of Internal Medicine, 2013). Choosing a broad-spectrum formula that feels comfortable enough to wear every day makes that habit easier to keep. For guidance specific to your skin, it is best to speak with a qualified professional.
Can sunscreen improve the look of existing sun damage?
Some clinical studies have associated daily use of a facial broad-spectrum sunscreen with visible improvements in the appearance of photoaged skin, including texture, clarity and the evenness of skin tone (Dermatologic Surgery, 2016), and a 2024 pilot study reported a positive effect on photoageing measures (Journal of Cosmetic Dermatology, 2024). These are cosmetic observations from research, and individual results differ.
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