Knowing more about SPF in sunscreen and its benefits

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Knowing more about SPF in sunscreen and its benefits
Knowing more about SPF in sunscreen and its benefits
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Sunscreen or sunscreen usually includes an SPF number on the packaging label. However, some people may still not understand the meaning of these numbers. What is SPF? What are the benefits for skin he alth? Let's find out the answer in the following article

Sunlight plays an important role in stimulating the formation of natural vitamin D in the body. However, excessive exposure to ultraviolet rays (UVA and UVB) from the sun is also not good for skin he alth.

Get to know more about SPF in sunscreen and its benefits - Alodokter

UVA rays can cause skin wrinkles and premature aging, while UVB can cause sunburn. Excessive exposure to UV rays in the long term is also known to increase the risk of skin cancer.

Therefore, your skin needs protection when doing activities in the sun. One way to protect the skin from the dangers of excessive UV rays is to use a sunscreen that contains SPF during the day.

What is SPF?

SPF or sun protection factor is a number that refers to the level of protection against sunlight. The SPF number refers to how long your skin can stay in the sun without getting sunburn when using sunscreen or sunscreen.

For example, if your skin normally turns red after 15 minutes of direct sunlight, it can take 20 times longer for your skin to burn if you wear a sunscreen with an SPF of 20.This means that your skin will only look red after 5 hours of exposure to the sun.

However, even though you have used a sunscreen with an SPF of 20, it doesn't mean that before 5 hours your skin will be completely safe and not sunburned. There are many factors that contribute to the intensity of UV exposure.

A person with white skin will experience sunburn faster than a person with dark skin. In addition, geographical factors, such as being at a high altitude, living in an area around the equator, or being at the beach, can also cause sunburn faster.

The SPF Number and Its Benefits in Protecting the Skin from UV Rays

The SPF number refers to the length of time that sunscreen can protect the skin from UV rays. The higher the SPF number, the longer the protective effect of the sunscreen.

In addition to the protection time from UV rays, the SPF number also refers to how much UV rays the sunscreen can block. Here is the explanation:

  • SPF 15 blocks 93% UVB
  • SPF 30 blocks 97% UVB
  • SPF 50 blocks 98% UVB
  • SPF 100 blocks 99% UVB

People who live in tropical climates or areas around the equator, for example Indonesia, need to regularly use sunscreen when they are active in the hot sun. The recommended sunscreen for use in the tropics is a sunscreen with a minimum SPF of 30.

Tips to Protect Skin from UV Rays

To protect your skin from harmful UV rays, you are advised to do the following tips:

1. Using sunscreen correctlyr

For a better protective effect, it is recommended that you apply sunscreen at least 30 minutes before going out in the sun.

Many people think that using sunscreen once is enough to protect the skin from sun exposure.However, this is not true. If you are out in the sun for long hours, you need to reapply sunscreen every 2 hours.

If the sunscreen you are using has a low SPF, you may need to reapply it every 30 minutes or 1 hour. Meanwhile, to protect your skin from UV rays indoors, you also need to use sunscreen, but only once.

2. Choose a sunscreen with a broad spectrum label

Some sunscreens with a certain SPF may only provide protection from UVB rays. To get protection against UVA and UVB, choose a sunscreen that includes broad spectrum or full spectrum.

Meanwhile, sunscreens with SPF below 30 are only able to protect the skin from sunburn, without protecting the skin from premature aging and the risk of skin cancer.

3. Wearing covered clothes

In addition to using a sunscreen with a minimum SPF of 30, you also need to wear clothes that cover all parts of your body, such as long pants and long-sleeved shirts.

Don't forget to also wear a wide hat and sunglasses that can block the sun's rays on the eyes and face.

4. Limiting activities in the sun

The sun will emit the most UV rays at 10 am to 2 pm. Therefore, as much as possible limit outdoor activities during these hours.

Exposure to the sun in sufficient quantities is good for the he alth of the body, but it can also be harmful if excessive. Therefore, if you need to be active in the hot sun, remember to always use a sunscreen labeled broad spectrum with a minimum SPF of 30.

Every sunscreen product has an expiration date. To be safer to use, pay attention to the date and remember not to use products that have passed the expiration date.

If you experience allergic reactions, such as hives and hives, after using a sunscreen with a certain SPF or if you experience symptoms of sunburn, you should consult your doctor.

The doctor will conduct an examination and provide appropriate treatment according to the skin problem you are experiencing.

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