Archives des Sunscreen Products - The Truth About Cosmetics

How about decoding the 5 most common “misconceptions” about suncare products?

There are certainly more, but here are the ones we come across most frequently.

Table of Contents

Myth #1: High-SPF Sunscreen Provides 100% Protection

False! Let’s be clear: exposing your skin to sunlight all day, even with the highest-SPF sunscreen, without protective clothing (hat, shirt, umbrella, etc.) carries real risks. No sunscreen—not even SPF 50 or a so-called «sun block»—offers unlimited protection.

Maximum exposure time depends on your skin type (phototype), the intensity of UV radiation, and your environment. For example, sunbathing in Northern Europe is not the same as sailing in the Caribbean!

There Is No Such Thing as “Total Protection”

The term “sunblock” is no longer allowed in marketing, at least in Europe. Even with the best and highest SPF, individuals react differently based on skin type. Someone with very fair skin (phototype I) may burn even with SPF 50, while someone with darker skin might tolerate longer exposure with a lower SPF. Sensible sun behavior remains essential: use shade, wear a hat….and limit exposure. Dermatologists recommend no more than one hour of sunbathing per day, and during low UV hours (early morning or late afternoon). Sunscreen is meant to help you enjoy reasonable sun exposure, not to justify staying in direct sunlight all day.

Myth #2: Reapplying Sunscreen Frequently Lets You Stay in the Sun All Day

False again. Reapplying sunscreen is important, especially after swimming or sweating, but it does not extend your total safe sun time indefinitely.

SPF and Maximum Exposure Time

The SPF (=Sun Protection Factor) is based on how long it takes for unprotected skin to burn. For example:

A phototype I (very fair skin) person may burn in 5 minutes without protection.
With SPF 10, they could stay 50 minutes (10 × 5) before burning.
With SPF 50, about 250 minutes.

This is only a rough guideline. SPF calculations focus on UVB rays and do not account for UVA rays, which penetrate deeper, accelerate aging, and contribute to skin cancer. That’s why all sunscreens in the EU must now provide both UVA and UVB protection.

Frequent application maintains protection, but doesn’t reset the clock. Always listen to your skin’s signals and combine sunscreen use with physical sun protection.

A quick reminder: what is the SPF* calculation based on?

The famous “sunburn” caused by UV-B rays is an inflammatory reaction of the skin, signalling its limit of protection against UV-B radiation. The exposure time of unprotected, untanned skin before sunburn varies – depending on skin type – between 5 and 30 minutes.
Unprotected phototype 1 skin, for example, would be “burnt” after 5 minutes. Protected by an SPF 10 rating, the skin will experience this effect a little later: after 10 x 5 minutes = 50 minutes; with an IP 50 rating, after 250 min (50 x 5 minutes).
However, this maximum exposure time is not an exact mathematical science where the timer would start ringing once the 250-minute time limit had elapsed, but an indication that can vary from one person to another.

Reapplying the cream frequently after sea bathing, perspiring, showering, etc., for as long as your skin type will tolerate, makes perfect sense.
As does the fact that you should always apply the product generously and evenly to ensure optimum protection.
But applying the cream repeatedly, throughout the day, doesn’t increase this maximum exposure threshold ad infinitum. And this maximum threshold remains a notion that varies from one individual to another.

The Sun Protection Factor (SPF) essentially indicates protection against UV-B rays, and does not include in its calculation UV-A rays, which penetrate the deeper layers of the skin, accelerate skin ageing and can cause skin cancer in the long term.
But don’t panic! All current sun protection products must comply with the 2006 regulations requiring all sun creams to protect against both UV-A AND UV-B rays, in a ratio of 1 to 3. A sunscreen with an SPF protection factor of 30, for example, will have to guarantee index 10 protection against UV-A .
(see question below)

*SPF = Sun Protection Factor.

Un graphique présente la "courbe de protection inversée" des indices de protections — La courbe de protection inversée des IP

Another important clarification: the different levels of protection

The “inverted protection curve” also means that there is a much greater difference between an index of 15 and 20 than between an index of 30 and 50.

Example: the SPF is used to assess the percentage of UV rays “that pass through” and cause erythema (= sunburn)

an SPF 2 stops 50% of UV rays
the SPF 15 stops 93% of UV rays
the SPF 20 stops 95% of UV rays
the SPF 30 stops 97% of UV rays
the SPF 50 stops 98% of UV rays

(The difference between an SPF 30 and an SPF 50 is small, just 1% in the end).
The conclusion remains the same: no sun cream provides 100% protection.

Which is the best sun protection ? Let's bust some sun protection myths — Which is the best sun protection ?

Myth #3: Organic (Mineral) and Conventional Sunscreens Are Basically the Same

Incorrect. Consumers can choose between:

Conventional sunscreens using synthetic UV filters

Certified organic sunscreens using only mineral filters (like zinc oxide or titanium dioxide)

How They Work

Chemical filters penetrate the skin and absorb UV rays; they need 20–30 minutes to become active.
Mineral filters sit on the skin’s surface and reflect UV rays like a mirror; they work immediately.

Different chemical filters are suspected endocrine disruptors or allergens, such as:

Oxybenzone (Benzophenone-3)
Homosalate
3-benzylidene camphor
4-Methylbenzylidene Camphor
4,4-dihydroxybenzophenone
Benzophenone-1
Benzophenone-2
Octyl Methoxycinnamate also called Ethylhexyl methoxycinnamate (OMC) ,Octinoxate
Octocrylene

They also raise environmental concerns, like coral reef damage and marine pollution. Organic-certified sunscreens avoid these synthetic filters, focusing instead on natural mineral protection.

Problematic UV filters added to other controversial ingredients

And in “conventional” suncare products, it’s not just UV filters that can pose a problem, but a host of other controversial chemical components. Generally speaking, these include – from a non-exhaustive list that varies from one product to another – high-risk products such as certain synthetic preservatives that are also classified as endocrine disruptors, components that are likely to develop nitrosamines, etc., etc., etc…
And of course a whole panoply of chemical pollutants (EDTA etc.), ingredients derived from mineral oils or silicone and many other ingredients that pose a serious problem for the environment and by definition also for marine animals and humans, the last links in the food chain.

Myth #4: Mineral Sunscreens Offer Less Protection

Not true. Some consumer reports here in France have been claiming that mineral sunscreens fail UVA protection standards, but these results often depend on the testing methods used (in vivo vs. in vitro).

Different independent tests in France (60 Millions de Consommateurs) and Germany (Stiftung Warentest, Öko-Test) have shown that certified organic sunscreens meet UVA/UVB ratio standards (1:3) and provide effective broad-spectrum protection.

Remember: regulations for UVA and UVB protection apply equally to all sunscreens, regardless of whether they’re organic certified (mineral) or conventional.

Mineral sunscreens are safe, effective, and offer environmental benefits—as long as you apply them correctly and combine them with sensible sun habits.

Myth #5: All Mineral Sunscreens Contain Nanoparticles

False. Certified organic sunscreens use micronized mineral filters, but that does not mean they all necessarily contain nanoparticles.

What Are Nanoparticles?

Particles sized 1–100 nm. Since 2013, any ingredient used in nano form must be clearly labeled with “[nano]” in the INCI list.

Most conventional sunscreens with high SPF levels are more likely to use mineral filters in nano form. In contrast, very few certified organic brands use nanoparticles, and those that do are subject to evolving natural cosmetic standards (COSMOS, Ecocert, Natrue, etc.).

Always check the ingredient list: if a filter like titanium dioxide is listed as [nano], it uses nanoparticles.

sun protection myths and common sense . — Sunprotection and common sense

So What Should We Really Do in the Sun?

This isn’t about magic products—it’s about common sense.

Like with weight loss (eat better, move more), sun protection relies on good habits:

Sun-Smart Guidelines:

Avoid peak sun hours (11 AM–4 PM)
Seek shade, wear wide-brimmed hats and sunglasses
Use long-sleeved clothing for natural photo-protection
Never expose babies or toddlers directly to the sun
Choose certified UV-protective clothing and umbrellas
Gradually acclimate your skin to the sun in spring
Eat antioxidant-rich foods (carotenoids, vitamin C/E) to boost skin resilience

Sunscreen is a tool (among other tools), not a « sunbathing license ».

Smart protection combines good products with good habits—the real key to healthy skin under the sun.

Sunscreen : myths debunked — Sunscreen : most common myths debunked

When choosing your sunscreen, it’s important to consider the ingredients it contains. Many sunscreen products contain controversial substances, such as suspected endocrine disruptors or a whole range of other potentially toxic, polluting or highly controversial substances.

Choosing sunscreen : how to choose the right product ?

First of all, it’s important to remember that sunscreen products… are just one “tool” among many. And that’s why it’s so important to remember that sun protection is a global approach. Far too often, we focus solely on the protection provided by sunscreens (which only represent partial protection anyway), without taking into account the context (phototype/place of exposure/time of day/history, etc.). This is an essential aspect that deserves real consideration, and one that has already been addressed in various articles.

To sum up: putting on sunscreen doesn’t exempt you from common sense.

To help you make the right choice, here are our top 5 tips for choosing sunscreens free from controversial ingredients.

1) Choose sunscreen adapted to your skin type (phototype) & activities

This concerns a whole variety of different parameters : context of exposure and your specific needs (hypoallergenic, sporting activities, exposure levels, etc.). However, there’s usually no need to buy 5 different sun creams: there are suitable products for the whole family, most of the time. Another very important aspect is that we generally don’t apply enough sunscreen for optimum protection. Official recommendations are as follows:

Recommended amount of sunscreen :

Use enough to cover your entire face and body (avoiding the eyes and mouth).
An average-sized adult or child needs at least one ounce of sunscreen (about the amount it takes to fill a shot glass) to evenly cover the body from head to toe.

Sunscreen : choose the right product — Sunscreen : which one should you use ?

Sunscreen : which one should you use ?

2 ) Respect expiration dates and storage times for suncare products

We often still have one or two opened products at the bottom of a drawer, dating back to last year. Once opened, the synthetic UV filters in conventional sunscreens generally lose their effectiveness after a few months. And with organic suncare products, even if the mineral filters seem to be more stable over time, the rest of the formulation doesn’t necessarily last beyond the product’s recommendations, especially if the product has already been opened.

It is therefore important to follow the logo and the “after opening” indication, which indicates the number of months you can keep your suncream once it has been opened. This is shown by a small pictogram in the shape of a jar, on which is written a number indicating the number of months during which you can safely use your product after opening.

3) Choose a sunscreen with the right sun protection factor… for you.

SCOOP: In the end, you don’t always have to choose the highest SPF. Firstly, because the difference between a SPF 30 and SPF 50 is quite small. It’s called the « inverted protection curve», implying that the difference between the lower SPFs factors are higher compared to the higher SPF factors, there is only a difference of 1% between an SPF 30 and SPF 50, for instance. And secondly, because no sunscreen can guarantee 100% UV protection – the term “sunblock” can officially no longer be used to market suncreams, at least in Europe.

The most important thing is to use sunscreen as a complementary protection tool (see below), not as a kind of “guaranteed exposure time” or “permit” that would allow you to lie on the beach all day long with SPF 50 – even if you apply it repeatedly.

What’s an SPF again? What’s the difference between SPF 30 and 50? See explanations here (article still in french for the moment.)

Does sunscreen expire ? — Suncreens : how to apply them correctly

4) Choosing organic or “conventional” sunscreen ?

In general, suncare products must comply with current legislation and basic requirements regarding UV-or UVA-protection, whether they are « conventional » or certified organic. So the difference is not in the sun protection, but in the basic formulation of the products.

On one side, conventional manufacturers use a wide range of ingredients, which are of course authorized by the European Cosmetics Regulation. But among these authorized ingredients, there are also many that are the subject of controversy.
On the other side, the natural and organic cosmetics sector (certified by various labels in Europe and abroad) works with a much more restricted number of ingredients, excluding a large number of components considered problematic, potentially toxic or polluting, for example – in any case, controversial at various levels.

As far as sunscreens are concerned, there’s also a clear difference in sun protection filters applied: conventional products use either synthetic/chemical filters, or a mixture of different filters (synthetic and mineral filters), and organic cosmetics can only use two mineral filters (titanium dioxide* and zinc oxide). But you also have to keep in mind that conventional products generally use a panoply of different UV filters, including many suspected endocrine disruptors. Endocrine disruptors are chemical substances that can interfere with the functioning of our hormonal system.

And apart from this basic difference, conventional products can also contain a whole range of potentially toxic, controversial and polluting substances. Tests carried out over the years attest to this. Whether for everyday face creams, organic sunscreens or children sun protection.

If you opt for conventional products, read the labels : before buying your sunscreen, take the time to read the labels to make sure the product doesn’t contain any controversial ingredients.

Suncreen filter : chemical or mineral — Conventional Suncreen Filters are problematic

Certified organic or “conventional” sunscreen?

The choice is yours, but organic sunscreens offer the same level of protection – without the slew of controversial ingredients.

Have you heard that organic sunscreens offer less UV_A protection? We’ve been reviewing the situation for years here and here (in french).

5) Choosing the right product is the first step, but don’t rely on sunscreen….exclusively

When discussing sunscreen products, it’s important to remember that it’s just one “tool” among many. These are “common sense” recommendations that have been repeated over and over for years. Enjoying the sun is all very well, but… preferably in moderation.

It’s best to avoid exposure to the sun between 11 a.m. and 4 p.m., and move into the shade or create shaded areas during the most critical hours.
Use the full range of sun protection equipment: wide-brimmed hat, sunglasses, parasol, anti-UV clothing, etc.
When the sun’s rays are at their most intense, it’s a good idea to wear covering clothing, which is already a means of photo-protection, whether in everyday life or at the beach. Other cultures set a good example.
For babies and toddlers: never expose them directly to the sun, as their skin is particularly sensitive and vulnerable. Protect their skin, even in the shade, and play it safe with anti-UV clothing or tents.
Eat a diet rich in antioxidants (vitamin E, vitamin C) and carotenoids (found in reddish-orange fruits and vegetables, for example), which also help protect against UV-A damage.
To enable your skin’s melanocytes to develop their natural protection (photoprotection/tanning), start gradually and accustom your skin to the sun from spring onwards, in small steps.

5 Common Myths About Sunscreen and Sun Protection

Category: Sunscreen Products