Sunscreen: because it's not just for summer (and how to choose yours)
You buy it in June, you put it away in September. That's the cycle for most people — and the number one reason why skin ages faster than it should. The sun that leaves its mark on the skin isn't just the sun that burns.
The spots and lines you blame on age are, to a large extent, from the sun
Most people use sunscreen as a beach accessory: June to August, and only when "it's hot". The result appears years later — spots, uneven tone, loss of firmness, fine lines — and is attributed to age. But there's a distinction that changes everything: there are two types of radiation, and seasonal sunscreen only addresses one of them.
- UVB — the ray that burns (B for burn). It acts on the surface, is more intense in summer and at midday. It's what you associate with "sunbathing".
- UVA — the ray that ages (A for aging). It penetrates clouds and glass, is present all year round at almost constant intensity, and penetrates deeper. It is primarily responsible for photoaging and dark spots.
In other words: stopping sunscreen in September leaves your skin exposed to the ray that ages it the most — during the other nine months of the year. Hence, the problem is not seasonal.
How this changes depending on your skin
Avoid heavy textures
Fluid or gel, dry touch, oil-free. Heaviness is the #1 reason people stop using it.
May need more comfort
Textures with hydrating agents prevent a tight feeling throughout the day.
Better with mineral filter
Zinc oxide, fragrance-free. Lower likelihood of stinging or irritation.
Non-comedogenic
Oil-free and light texture, to avoid adding occlusion to oiliness.
How to read: the best sunscreen is the one you use every day. Identify your profile and choose the texture that won't make you give up — the perfect formula that stays in the drawer doesn't protect anything.
What really protects — and what gives false security
| Habit | What it does | Verdict |
|---|---|---|
| Only using SPF in summer | Covers peak UVB, ignores UVA the rest of the year | Insufficient — leaves photoaging exposed |
| Applying a thin layer | Reduces real protection well below the label's SPF | Fails — incorrect quantity |
| Not reapplying during the day | Protection degrades with hours, sweat, and touch | Fails with prolonged exposure |
| Trusting the SPF in moisturizer/foundation | Rarely apply enough to reach the SPF | Complement, not substitute |
| Dedicated, broad-spectrum, daily SPF | Covers UVA+UVB all year round, in the correct quantity | Works |
How to read the table: the Verdict column summarizes whether the habit provides serious protection. Green = real and sustained protection. Terracotta = feeling protected without actually being protected. Always look for the "broad spectrum" indication on the label: it guarantees UVA in addition to UVB.
Want a daily, light-textured sunscreen? Check out our collection of natural sunscreens.
View sunscreensHow sunscreen blocks the sun
Sunscreen filters fall into two main groups. Mineral (physical) filters reflect and scatter radiation on the surface; organic (chemical) filters absorb it and convert it into heat. In a natural brand, the focus is on mineral filters.
About the comedogenicity scale: 0 to 5, measures the potential to clog pores. Zinc oxide is at the minimum and is one of the best-tolerated filters — hence it's the base for sunscreens for sensitive skin. The downside is the possible white cast, which modern formulations mitigate.
Note: it is often combined with zinc oxide. Zinc covers long UVA (the most aging ray); titanium reinforces UVB. Together they provide broad-spectrum protection with 100% mineral origin.
Comparative: mineral vs chemical, and SPF 30 vs 50
| Criterion | Mineral (physical) | Chemical (organic) |
|---|---|---|
| How it works | Reflects/scatters on the surface | Absorbs and converts to heat |
| Start of protection | Immediate | ~15–20 min after application |
| Sensitive skin | Generally better tolerated | May sting/react |
| Texture | May leave a white cast | Usually lighter/invisible |
How to read: there's no absolute "best" — there's what's best for you. Reactive skin tends to get along better with mineral; those who prioritize invisible texture may prefer chemical. As for the factor: SPF 30 blocks ~97% of UVB and SPF 50 ~98%. The difference is small on paper, but relevant for fair, reactive skin or high exposure — and almost no one applies the ideal amount, so starting with 50 gives a margin.
"Broad spectrum" is not a marketing detail — it's what guarantees you're protected from UVA, the ray that ages. Without that mention, the sunscreen may only cover UVB.
What you gain from using SPF all year round
The Technical Sheet above tells you what filters do. Here's what you reap from daily habit — and why it's, by far, the skincare step with the best return.
Less photoaging
Blocks UVA, the main cause of premature lines and loss of firmness.
Fewer spots
Prevents hyperpigmentation and stops existing spots from darkening.
Protects your active ingredients
Vitamin C, acids, and natural retinoids only work on sun-protected skin.
More even tone
Controlled sun exposure keeps skin more homogeneous over the years.
Overall: it is estimated that a large portion of visible skin aging — often cited above 80% — results from sun exposure, not the passage of time itself. Daily broad-spectrum protection is widely agreed upon by dermatologists to prevent photoaging and dark spots. It is the gesture that best preserves the results of your entire routine.
The right daily routine — all year round
Prepares the skin in the morning without stripping.
Vitamin C or niacinamide serum, if part of your routine.
Suitable for your skin type.
Broad spectrum. Apply generously and let it absorb before makeup.
Every ~2 hours outdoors, or after sweating/swimming. On an office day, morning application is usually enough.
For the face and neck, the reference amount is equivalent to two lines of product along your index and middle fingers. Less than this, and you won't achieve the SPF on the label — the most common mistake of all.
Which sunscreen for your skin type
| Skin type | Look for | Why |
|---|---|---|
| Oily | Fluid/gel, dry touch, oil-free | Lightness = you'll use it every day |
| Dry | Comfortable/hydrating texture | Prevents tightness throughout the day |
| Sensitive / reactive | Mineral, fragrance-free | Lower risk of irritation |
| Acne-prone | Non-comedogenic, light | Doesn't add occlusion to oiliness |
How to use the table: find your row and take the indication with you when choosing. All share the essentials — broad spectrum, SPF 30 or higher — only the texture changes.
Honesty: the best sunscreen is the one you apply every day, in the right amount. An SPF 30 you always use is worth more than the "ideal" one that gathers dust. Start with the habit; the formula can be refined later.
Facial Sunscreen · Broad Spectrum
Mineral filters, light texture for daily use. Vegan and Ecocert COSMOS Natural.
Frequently asked questions
Do I need sunscreen in winter and on cloudy days?
Yes. UVA — the ray that ages the most — penetrates clouds and remains almost constant all year round. Daily protection makes sense in all seasons.
SPF 30 or SPF 50?
SPF 30 blocks about 97% of UVB and SPF 50 about 98%. For daily urban use, 30 is enough; for fair, reactive skin or high exposure, 50 gives more margin.
Do I need to reapply if I wear makeup on top?
With prolonged exposure, yes. There are mist or powder solutions with SPF to reapply without ruining makeup. For an indoor day, morning application is usually sufficient.
Is the SPF in my moisturizer or foundation enough?
Rarely. The SPF on the label is only achieved with the test quantity, which almost no one applies with moisturizer or foundation. They serve as a complement, not a substitute for a dedicated sunscreen.
Mineral or chemical for sensitive skin?
Mineral filters (zinc oxide, titanium dioxide) tend to be better tolerated by sensitive and reactive skin, with a lower likelihood of stinging.
How much should I apply to my face?
The reference is the "two-finger rule": two lines of product along the index and middle fingers cover the face and neck. Less than this reduces real protection.
Beauty without labels, straight to the essential
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