Physical, chemical or biological? Pros and cons of each type of sunscreen – Health and Medicine

2024-07-09 08:56:57

The keys to choosing one or the other depend on skin type, with the common goal of preventing sun damage.

When it comes to sunscreens, we cannot say that one is better than the other, but we can say that they are more or less indicative depending on the type of skin they are targeting or text preferences, for example. To know them better and be able to recommend the best one, below, we analyze what they are like, and their pros and cons. Broadly speaking, we can explain that chemical sunscreens absorb UV radiation, while physical sunscreens reflect it. But there are many other considerations.

Chemical filters

• How they are formulated: with chemical compounds (hence its name). The most common ingredients are avobenzone, octocrylene, octisalate and oxybenzone, among others.

• How they do it: like a sponge that absorbs UV rays before they can damage the skin. These filters absorb UV radiation and convert it into heat, which the skin releases.

• Presentation: in creams, gels and sprays.

• The best:

• They are always light, which makes them easy to use and, in general, they do not leave a white residue on the skin.
• They are appreciated by all color tones, especially black ones, where the white residue is more visible.
• They are more resistant to water than physical filters, which is why athletes and people who do water sports and outdoor activities in general.

• To think:

• Some people may experience skin irritation or sensitivity due to the chemical ingredients in sunscreens.
• They don’t work as fast as physical ones. Therefore, they must be used half an hour before exposure to sunlight.
• Some chemical filters may offer limited coverage to certain types of UV radiation (such as UVA rays), for example, unless they are specifically formulated to provide full-spectrum protection.

Physical filters

• How they are formeds: with physical elements such as titanium dioxide and zinc oxide, which remain on the surface and act as a protective barrier.

• How they do it: They reflect UV light and prevent them from penetrating the skin.

• The best:

• Some people may have sensitivities or allergies to certain chemical ingredients, so physical filters may be a better option for them.
• They tend to be more effective in protecting against a broader spectrum of UV radiation, including UVA and UVB rays.
• Because of their ability to reflect and scatter radiation, they provide protection against a broad spectrum of ultraviolet (UV) radiation, including UVA and UVB rays.
• Best suited for sensitive or sensitive skin: titanium dioxide and zinc oxide tend to be more irritating than other ingredients used in chemical sunscreens.
• Processing in less time: physical filters offer protection immediately after application by forming this protective barrier.
• They are more resistant to water and sweat than some chemical filters.

• To think:

• Thick: Physical filters are heavy and leave a white residue, not very pleasant for dark skin types.
• They are more difficult to use because of the weight of their texture.
• Comedogenic: Some people may experience clogged pores and cause acne breakouts.
• There are a few options to choose from compared to chemical filters.

Hybrid formulas

There are sunscreens that combine chemical and physical sunscreens in one formula. They are designed to use both types of sunscreens and provide broad and effective protection against UV rays. Some brands may refer to these products as ‘broad spectrum’. Combining chemical and physical sunscreens can offer a number of benefits, such as lighter, clearer skin, with additional protection provided by natural ingredients that reflect UV radiation.

This can help people with different skin tones and application preferences. However, the effectiveness and safety of sunscreens will depend on the quality of the formula and the ingredients used.

Of the Organization

They use natural or biological materials (hence their name) instead of synthetic ones. These ingredients can be zinc oxide, titanium dioxide, and plant extracts that provide physical protection against UV rays. Most of these products are formulated with organic ingredients that are certified as environmentally friendly. To ensure they are effective, they must be used and reapplied exactly like any other sunscreen.

What to consider when choosing the right security

If years ago we only talked about skin photos, today we talk about personal photo protection. You must take into account the type of skin (sensitivity, acne, blemish…) and, very importantly, the possible rejection of certain ingredients. It is also important to look at preferences and needs at all times: urban protection is not the same as a specific one for an athlete, which will be designed to resist sweat or be water resistant (in aquatic activities).

The care and presentation of the chosen protector is also important, since, if you use it with pleasure, it will be easy to use well. About the protection factor, the American Academy of Dermatology recommend at least SPF30 for daily use and SPF50+ for prolonged outdoor activities or strong sun exposure. In any case, it is important to opt for brands that have been physically tested and meet safety and effectiveness standards. Rv. Ana Mera, a pharmacist. Barcelona