How long do sunscreens protect?

Protecting the skin from the harmful effects of the sun's ultraviolet (UV) rays is extremely important, and sunscreen products are an essential tool in achieving this goal. However, many people are unaware of the factors that can affect the effectiveness of sunscreen products and the importance of reapplying them.

You may have heard of sun protection factor (SPF) and its role in determining how long a sunscreen lasts, but understanding the correct SPF for your skin type and prevailing UV index is just as important. In this article, we'll look at these factors and guide you in choosing the right sunscreen to keep your skin healthy and protected.

What is SPF?

When it comes to a sunscreen product, the SPF rating is the deciding factor in determining how well it protects the skin from harmful UV rays. In simple terms, the SPF number indicates the amount of time your skin will burn in the sun while wearing the sunscreen, compared to the amount of time it will burn without it. For example, if your skin usually turns red after 10 minutes of sun exposure, an SPF 15 sunscreen can extend that time to 150 minutes (10 minutes x 15 SPF), or roughly two and a half hours.

As the SPF increases, so does the duration of protection. A product with SPF 30 can provide up to five hours of protection, and SPF 50 for up to eight hours. Still, it's important to reapply sunscreen every two hours, regardless of SPF rating. In this way, you can ensure that your skin will be maximally protected throughout the day.

How to choose the right sunscreen product?

When it comes to choosing a suitable sunscreen product, it is important to consider your individual skin phototype and current UV radiation index. Skin phototype is determined by factors such as skin pigmentation, eye and hair color, and your ability to tan. Let's take a closer look at the different phototypes:

Phototype I: If you have very pale skin, red hair and a hard time getting a tan, you fall into this category. People with this skin type are more prone to sunburns and allergic reactions from sun exposure.

Phototype II: People with light skin and blond or light hair fall into this category. They also have a hard time getting a tan and are more prone to sun-related allergies.

Phototype III: This category includes people with an intermediate skin color, usually with brown hair. They can achieve a moderate tan and are less prone to sunburn and allergies.

Phototype IV: If you have dark skin and black hair, you belong to this category. People with this skin phototype tan easily and quickly.

Phototype V: This category includes skin that is darker than phototype IV, and individuals with this skin type have an increased tolerance to sun exposure.

Phototype VI: This category includes black skin, which is common in people of African descent.

Understanding your skin phototype is the first step to choosing a suitable sunscreen product that provides adequate protection against the sun's harmful rays.

In addition to the phototype, it is crucial to consider the ultraviolet radiation index provided by the Ministry of Health. This index is classified into four categories: low UV radiation (1-3), medium radiation (4-6), high radiation (7-9) and extreme radiation (above 10).

When choosing a sunscreen product, it is important to make sure that the SPF matches the prevailing UV radiation index. In low UV environments, SPF 15 or 30 may be sufficient for daily use. However, for areas with high or extreme UV radiation, a higher SPF of 50 or more is recommended to provide optimal protection.

It is worth noting that sunscreen alone is not enough to protect your skin from the sun's harmful rays. It should be used in conjunction with other sun protection measures, such as staying in the shade during peak hours, wearing protective clothing, and using sunglasses and a hat with a visor or brim.

Why do you need to reapply sunscreen every 2 hours?

Ever wonder why you're advised to reapply SPF 50 sunscreen every two hours even though it offers 8-hour protection? The answer lies in the fact that our skin is constantly exposed to external elements that can reduce the effectiveness of the SPF product within two hours. We can touch our skin or perform activities that can negatively affect the effectiveness of the sunscreen product.

Additionally, sunscreen absorption varies from person to person depending on factors such as skin type, thickness, and sensitivity. Delicate areas with thinner skin require extra attention and reapplication to ensure maximum protection.

The recommendation to reapply every 2 hours is a general guideline intended to ensure that the majority of the population receives adequate protection, but it is important to note that individual differences and circumstances may require more frequent application. So to stay safe and protected from harmful UV rays, be sure to reapply your sunscreen as needed, especially if you're active and sweaty or get in the water frequently.

Now that you are well-versed in the importance of sun protection and the right choice, our team is here to provide you with a high-quality ally. Sun Like products have specially developed formulas, trying to provide maximum protection to our users and at the same time take care of the environment.