Why is sun protection not just a summer issue?
For many years, it was believed that sunscreen creams were products reserved only for vacations and beach days. However, modern dermatology and cosmetology leave no illusions: sun protection is the foundation of year-round skincare. Solar radiation reaching us every day, regardless of the season, temperature, or cloud cover, causes immediate cellular damage. Its visible effects are premature skin aging, loss of elasticity, and unsightly discoloration.
A conscious approach to skincare requires understanding that the sun emits different types of rays that penetrate our tissues in different ways. Ignoring this fact and avoiding filters on cloudy days is the most common mistake that undermines the effects of even the most expensive anti-aging serums or advanced salon treatments.
UVA, UVB, and HEV radiation – know your enemy
To effectively protect the skin, we need to know exactly what we are protecting it from. The solar spectrum reaching the Earth's surface carries threats of different characteristics.
UVB (Burn) – responsible for burns and redness
UVB radiation makes up about 5% of the total ultraviolet radiation reaching the Earth. It has a short wavelength (280–320 nm) and mainly penetrates the outer layer of the skin – the epidermis. It is responsible for vitamin D synthesis but also causes visible redness, sunburns, and direct DNA damage to cells, drastically increasing the risk of skin cancers, including melanoma. Its intensity varies depending on the season and time of day – it is strongest in summer, between 10:00 AM and 3:00 PM.
UVA (Aging) – the silent collagen killer (penetrates through glass!)
UVA accounts for up to 95% of UV radiation. It has a longer wavelength (320–400 nm), allowing it to penetrate deeply into the dermis. It acts insidiously: it doesn’t hurt, doesn’t cause immediate burns, but destroys collagen and elastin fibers, generating huge amounts of free radicals. UVA radiation maintains a constant intensity throughout the year – it penetrates clouds, window glass, and car windows. It is the main cause of photoaging (deep wrinkles, loss of firmness) and permanent pigmentation spots.
HEV Light (Blue Light) – why does your smartphone also age your skin?
High Energy Visible Light (High Energy Visible Light), commonly called "blue light," is emitted both by the sun and screens of smartphones, laptops, and TVs. Research shows that HEV penetrates the skin deeper than UV radiation, reaching layers where fibroblasts are located. It induces strong oxidative stress, accelerates wrinkle formation, and intensifies hard-to-remove pigmentation (melasma), especially in people with darker skin tones. That’s why skin protection is necessary even when working in an office and in front of computer screens.
What do the abbreviations SPF and PA on cosmetic packaging mean?
When choosing a protective product, the label shows parameters indicating the level of protection against specific types of radiation. Correctly interpreting these is key to making an informed purchase.
SPF (Sun Protection Factor) – protection against UVB
The SPF rating indicates a cosmetic’s ability to protect the skin from sunburn caused by UVB radiation. Mathematically, if without a filter your skin starts to redden after t minutes, then using an SPF 30 filter theoretically extends this time to 30 × t. In practice, protection levels look as follows:
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SPF 15 – blocks about 93% of UVB radiation.
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SPF 30 – blocks about 97% of UVB radiation.
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SPF 50 – provides the highest standard protection, blocking about 98% of UVB radiation.
No product provides 100% protection, so the difference between SPF 30 and SPF 50, although small in percentage terms, is crucial for sensitive, couperose, or pigmentation-prone skin.
PA Scale – UVA Protection
The PA system developed in Japan (Protection Grade of UVA) informs us about the level of protection against UVA rays, based on the PPD index (Persistent Pigment Darkening). The protection level is expressed using plus signs:
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PA+ – low UVA protection.
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PA++ – moderate protection.
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PA+++ – high protection.
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PA++++ – extremely high protection (most desired in daily anti-aging care).
Types of sunscreens: Physical, chemical, and new generation
Sun protection substances are divided into groups depending on their chemical structure and mechanism of action on the skin.
| Filter feature / type | Physical (Mineral) Filters | Traditional Chemical Filters | New Generation Filters (Stable) |
| Main representatives | Zinc oxide (Zinc Oxide), Titanium dioxide (Titanium Dioxide). | Avobenzone, Octocrylene, Oxybenzone. | Tinosorb M, Tinosorb S, Uvinul A Plus, Mexoryl XL. |
| Mechanism of action | Act like micro-mirrors – reflecting and scattering UV rays on the skin surface. | Absorb solar radiation energy and convert it into harmless heat. | Combine features of chemical and physical filters: strongly absorb and partially reflect UV. |
| Advantages | Extremely stable, safe for sensitive skin and children, act immediately after application. | Light texture, do not whiten the skin, work perfectly under makeup. | Photostable, do not show allergenic potential, do not require frequent reapplication in the city. |
| Disadvantages | They may leave a white cast, feel heavy, and slightly dry out the skin. | They can degrade under sunlight, potentially irritating the eyes and sensitive skin. | They are more expensive to produce and harder to formulate in very matte textures. |
Cosmetologist's tip: The best modern protective creams are hybrid formulas. They combine mineral filters with modern organic filters, ensuring maximum protection spectrum while maintaining an ultra-light, comfortable texture.
How to choose an SPF cream for your skin type?
A sunscreen won’t do its job if you stop using it after a few days because of clogged pores or excessive shine. The product must be strictly tailored to your skin’s needs.
SPF for acne-prone, oily, and combination skin
People with this skin type often fear "heavy" formulas. Look for products labeled non-comedogenic, with a light gel, fluid, or mattifying emulsion formula. Ingredients like silica, niacinamide, or zinc PCA help regulate sebum production throughout the day. Modern chemical and hybrid filters work perfectly here without clogging pores.
Filters for dry, dehydrated, and mature skin
Dry skin will love SPF creams with a rich, nourishing texture. The ideal product should contain additional moisturizing and barrier-regenerating ingredients: hyaluronic acid, ceramides, squalane, and glycerin. For mature skin, strong antioxidation is crucial – the presence of vitamin E, coenzyme Q10, or green tea extract enhances the anti-aging effect of the sunscreen.
Skin protection for discoloration and capillary-prone skin
For those prone to redness and broken capillaries, mineral filters are the ideal choice (zinc oxide soothes and has anti-inflammatory properties). When fighting discoloration (sun spots, hormonal, post-acne), the absolute standard is SPF 50+ and PA++++. It’s worth choosing products enriched with vitamin C, tranexamic acid, or arbutin, which actively block the melanogenesis process.
How much sunscreen to apply on the face? (Two-finger method)
To make daily measuring of the right amount of product easier, the two-finger rule is used. Squeeze two thick lines of cream along the entire length of your index and middle fingers. This amount (about 1.25 ml) ensures you cover your face, ears, and jawline with a layer that provides real protection according to the SPF factor stated by the manufacturer.
Reapplying SPF during the day – how to do it over makeup?
Filters degrade under radiation, sweat, and mechanical touching of the face. If you are in full sun (beach, long walk), reapplication is necessary every 2–3 hours. In urban conditions, if you work in an office and your SPF is based on new-generation filters, reapplying before leaving work is completely sufficient.
How to reapply sunscreen over makeup? Modern solutions help: SPF mists, mineral powders with high SPF applied with a brush, and special sponges (beauty blenders) that gently pat a light protective emulsion without disturbing the foundation underneath.
Facts and myths about sun protection
Many misunderstandings have arisen around SPF, which are worth finally clarifying using scientific facts.
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Myth: Using SPF causes a drastic vitamin D deficiency.
Facts: No filter blocks 100% of UVB radiation. Even with strict use of SPF 50, enough radiation reaches the skin to synthesize cholecalciferol. Additionally, optimal vitamin D production requires only 15 minutes of exposure of forearms and legs daily without sunscreen, outside peak sun hours.
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Myth: If foundation has SPF 15 and cream SPF 30, my protection is SPF 45.
Facts: Sunscreens do not add up mathematically. Your protection equals the highest SPF of the applied product – in this case SPF 30 (provided the correct amount of both products is applied).
Not just the face: Sun protection for hair and lips
Facial skin is not everything. UV rays also damage hair structure by oxidizing melanin, leading to dryness, brittleness, and color fading (both natural and dyed). During exposure, it’s worth using light UV filter mists on the strands and protecting the scalp (parting) with a stylish head covering.
Lips are almost completely devoid of melanin and have a very thin epidermis, which makes them quickly susceptible to photodamage and chapping. A daily protective lip balm or lipstick with SPF 30 or 50 is an absolute essential in every purse.
