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Sun Protection for Face

Sun protection for the face is essential to prevent skin damage and premature aging. Biological sunscreen contains the protective powers of medicinal plants and boosts the skin’s ability to neutralize free radicals. Chemical and mineral sunscreen on the other hand contains substances that burden the skin and the ecosystem.

Biological sunscreen contains photoprotective plant substances that filter UV radiation and stimulate the skin’s self defences. Combined with a small amount of minerals, biological filters protect the skin sufficiently, while not inhibiting the synthesis of vitamin D. Vitamin D synthesized through the skin is essential to strengthen the skin’s immune system and to assure even pigmentation.

Products for Natural Sun Protection

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Perfecting Illumination

Makeup & Antiaging Cream

Zen Solaire

Biological & Physical Sunscreen Balm

Sample – Zen Solaire

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15 €

Is Biological Sunscreen better?

Sun protection tips from LE PURE’s founder

Sunscreen & Free Radicals

Dermatologists and beauty magazines often cite the Nambour study when recommending the benefits of daily sunscreen. But very few professionals talk about the differences between sunscreen types and how they actually interact with the skin.

High-SPF chemical and mineral formulations are frequently marketed as the ideal solution, yet research shows that sunscreens with high concentrations of chemical or mineral filters can themselves generate free radicals within the skin. Chemical filters are also suspected to cause hormone disruption.

True antiaging sun protection goes beyond SPF. It is a personalised practice that combines responsible sun exposure, a well-chosen sunscreen, and physical protection such as hats and clothing.

The research on chemical filters

In 2006, researchers at UC Riverside showed that three of the most common chemical filters (oxybenzone, octinoxate, and octocrylene) penetrate into the living epidermis over the course of about an hour on the skin. Once there, under UV light, they generate reactive oxygen species above the levels produced in unprotected skin (Hanson et al., Free Radical Biology and Medicine).

FDA-led trials published in JAMA (2019, 2020) confirmed that six widely used chemical filters (avobenzone, oxybenzone, octocrylene, homosalate, octisalate, and octinoxate) enter the bloodstream after a single day of use, at levels above the FDA’s toxicological threshold of concern, and some remain detectable in plasma up to three weeks later.

Mineral sunscreens and free radicals

A November 2025 study in Environmental Science & Technology Letters tested seven commercial sunscreens and found that all of them generated persistent free radicals under UV exposure — radicals that continue producing oxidative damage for days after light exposure ends (Vejerano et al.). The pattern was also observed in mineral sunscreen: the higher the SPF, the more free radicals a sunscreen tends to generate.

The benefits of biological filters

Certain plants have photoprotective properties and act as biological sunscreen filters. Combined with a small amount of minerals (uncoated and non-nano), you get a sunscreen that both protects and neutralizes free radicals for many hours after sun exposure.

Creating a truly biological sunscreen was our objective when formulating Zen Solaire. The high concentration of plant nutrients (88%) protects, regenerates and neutralizes free radicals. The 12% mineral content (uncoated, non-nano) is strong enough to provide the skin with physical protection, but its low proportion limits the formation of free radicals from the filter itself.

The SPF 20 of Zen Solaire has been deliberately chosen to create broad-spectrum protection with an ideal balance between plant nutrients and minerals. The formula blocks 95% of UVB radiation and is within the range the European Commission recommends for sufficient UV protection (SPF 15 to 25).

Higher-SPF sunscreens generally require higher filter concentrations to reach those SPF numbers, which tends to increase the free radicals generated inside the skin.

These products may have their benefits on certain occasions, but they are not the best long-term antiaging solution for the skin.

Trust the science and nature, not the promotional claims of conventional sunscreen brands.

Dark Spots & Sensitized Skin

If you protect your skin and still notice new dark spots, the cause is often not the sun itself. In many cases, the skin has simply become sensitized, and this makes it far more likely to develop pigment.

What sensitized skin really is

Sensitized skin is not a permanent skin type. It is a temporary, more reactive state that any skin can fall into. This matters for pigmentation because a dark spot is melanin, produced by cells called melanocytes, and these cells respond to much more than UV light:

Inflammation
Oxidative stress
Heat
Visible light

When the skin is in a sensitized, reactive state, the same time outdoors causes more inflammation than usual, and that inflammation is what leads to uneven pigment.

What sensitizes the skin

Often, the cause lies in the very things we do to try to improve our skin or substances we use daily:

Retinoids, exfoliating acids, peels and over-exfoliation
Lasers and recent waxing
Fragrance and citrus oils
Photosensitizing medication
A weakened barrier, heat and dehydration

This is why aggressive treatments frequently backfire. Harsh acids, peels and lasers inflame the skin further, creating a cycle in which each attempt to remove a spot only encourages the next one to form.

The gentle and long-lasting solution

To break this cycle, the skin does not need more exfoliation or stronger sunscreen. It needs the chance to stop being sensitized, to be calmed, to be nourished with real plant nutrients, and to be renewed gently rather than forcefully.

Use a biological sunscreen like Zen Solaire that contains a high concentration of plant nutrients that protect, balance, and support the optimal functioning of the pigment-producing cells.

Renew the skin with a periodic yet extremely gentle exfoliation and natural, non-sensitizing retinol, from the beta-carotenes of calendula in True Revelation.

Working with the skin’s natural functions, and supporting it with nutrients it recognizes and absorbs, builds healthy, resilient skin and an even, luminous complexion over time.

Visible Light

Most of us know about UVA and UVB radiation, but very few realise that visible light — the light we can actually see — also contributes to skin aging and dark spots.

While UVB sits at 290 to 320 nanometres and UVA at 320 to 400, visible light spans roughly 400 to 700. Its highest-energy portion, blue light, sits at around 400 to 500 nm, and research increasingly links this blue-violet light from the sun to both dark spots and premature aging, as the oxidative stress it creates can also break down collagen.

Not all sunscreens protect against visible light. Whether they do depends on the formulation, and most approaches have important disadvantages for the skin:

Chemical filters can reach into the visible range with new filters, but they add synthetic chemicals to the body and, through our water, to the ecosystem. Fine for the occasional day; used daily and long-term, several studies have raised concerns about hormonal balance and marine life.
Tinted sunscreens work through iron-oxide pigments, but sit as a heavy layer of colour, best kept for occasional wear, unless the formula is genuine plant-based skincare with minerals, like Perfecting Illumination.
Mineral filters attenuate blue and high-energy visible light, yet a mineral-heavy formula generates more free radicals, and more oxidative stress means more pigment. And clear, nano-sized minerals, used for an invisible finish, no longer attenuate visible light at all.
Antioxidants do not block light, but neutralise the free radicals it creates. Most sunscreens contain only a tiny amount of antioxidants, often 1–2% or less, even if marketing leads consumers to assume it is much higher.

The best sunscreen should attenuate visible light with the ideal concentration of mineral filters — not too high — and neutralise whatever free radicals do form.

Zen Solaire was formulated to provide the most balanced protection:

SPF 20 blocks 95% of UVB. An SPF 30 adds only about 2% more, and an SPF 50 about 1% beyond that, while SPF 30 and 50 require higher amounts of filter, which increases free radicals and oxidative stress.
UVA protection of Zen Solaire is 42% of the UVB value, well above the 33% minimum a broad-spectrum sunscreen has to meet.
The mineral concentration of Zen Solaire of 12% (non-nano) is sufficient to protect against UVB, UVA and visible light, without overloading the formula with filters or generating unnecessary free radicals.
88% photoprotective, antioxidant plants — the highest concentration of plant nutrients — which widen the protection, neutralise free radicals for hours after exposure, and support the pigment-producing cells.
Free from chemical filters, coated minerals, synthetic fats and chemically modified fats.

In short, the minerals do the physical work against blue and visible light, while the plant nutrients widen the protection and absorb the oxidative stress any filter creates.

Ideal protection is not a higher number. It is the right balance between minerals, plant nutrients and the absence of synthetic or chemically modified substances.

Medication & the Sun

Some medications make the skin react more strongly to light. Combined with the sun, they can cause exaggerated sunburn, rashes, and the inflammation that leads to the appearance of dark spots. The reaction is largely driven by oxidative stress, and while UVA is the main trigger, UVB and visible light can contribute too.

There are two forms of reactions:

A phototoxic reaction is the more common one: it looks like an intense sunburn and appears within hours, only on the skin exposed to light.
A photoallergic reaction is less common, resembles eczema, and can appear a day or more later.

Medications that can cause it

This is not a complete list, and it is not a reason to worry, only to be aware. Among the most commonly involved are:

Diuretics, especially hydrochlorothiazide, the single most common cause of all
Antibiotics, especially tetracyclines (doxycycline), fluoroquinolones (ciprofloxacin) and sulfa drugs
The contraceptive pill and other hormones
Anti-inflammatories (NSAIDs), such as ketoprofen, ibuprofen, naproxen and diclofenac
Blood pressure and heart medications, such as ACE inhibitors, sartans, calcium channel blockers and amiodarone
Oral retinoids, including isotretinoin for acne
Antidepressants and antipsychotics, such as amitriptyline and chlorpromazine
Statins, such as simvastatin and atorvastatin
Some antihistamines, such as loratadine and cetirizine
Antidiabetic medications
Certain antifungals, such as griseofulvin
St John’s Wort

Important

If you take any of these, please do not stop your medication. The goal is never to interrupt treatment, only to protect your skin while you are on it. If you are unsure whether something you take increases sun sensitivity, your doctor or pharmacist can tell you, and they can advise on the level of protection you need.

Why the kind of sunscreen matters

When the skin is already made reactive by a medication, what you put on it matters as much as how diligently you protect it. And here is something most people never hear: the chemical filters in conventional sunscreens are themselves among the most common causes of sun-triggered skin reactions.

They can provoke their own photoallergic responses, and they generate free radicals under light, adding to the very oxidative stress behind the reaction. Adding more synthetic chemicals to skin that is already managing a medication is the opposite of what it needs.

Mineral filters, by contrast, are not known to cause these reactions, which makes them the safer choice for sensitized skin.

How to protect sensitized skin

Choose a sunscreen with strong UVA coverage, a high antioxidant content, and no chemical filters or synthetic fragrance.

An example of such a sunscreen is Zen Solaire thanks to its ideal concentration of mineral filters (12%), high UVA protection (42% of the UVB value), and its 88% photoprotective plant nutrients that neutralise free radicals for hours.

Use physical protection like hats, light clothing, and shade. Avoid the sun during peak hours, and follow any guidance your doctor gives you.

Drug-induced photosensitivity is manageable if the skin is sufficiently protected with clothing and a biological sunscreen. With a little awareness, you can stay on the treatment you need, protect your skin and reduce the risk of new pigmentation.