What SPF is suitable for autumn UV rays?

In autumn, the sunlight becomes less intense, and you may feel that the effect of UV rays on your skin is less. However, in reality, UV rays rain down on us all year round, and their effects on our skin cannot be ignored. Especially in autumn, it is dangerous to let your guard down just because the ultraviolet rays are not as strong as in summer. So, what is the best SPF for autumn? In this article, we will explain in detail how to protect against UV rays in autumn, and introduce how to choose an appropriate SPF.

Ultraviolet rays that you can’t let your guard down even in autumn

UV rays in autumn are not as strong as in summer, so many people do not wear sunscreen. However, autumn UV rays are still strong, and long-term exposure can damage your skin. There are two main types of UV rays, UVA and UVB, and both affect your skin in different ways.

• UVA: Penetrates deep into the skin and causes photoaging, which causes wrinkles and sagging. UVA rays rain at a constant intensity all year round and can even pass through window glass, so you can be affected even if you are indoors.
• UVB: Damages the epidermis, causing sunburn and inflammation. The intensity of UVB varies depending on the season, and is especially strong in the summer, but you need to take precautions even in the fall.

What is SPF? How should I choose?

SPF (Sun Protection Factor) is an indicator that mainly indicates protection against UVB. Generally, the higher the SPF number, the stronger the ability to protect your skin from UVB. SPF 15 will increase the time until sunburn by 15 times, SPF 30 will increase the time until sunburn by 30 times, etc.

How to choose the best SPF for autumn

It is important to consider the following points when choosing the SPF you need to protect against UV rays in autumn.

1. Daily life: If you mainly go out for short periods of time, such as commuting or shopping, an SPF of 15 to 30 is suitable. UV rays in autumn are not as strong as in summer, so a lower SPF can provide sufficient protection.
2. Long time out: If you are going to be outdoors for a long time, such as hiking or playing sports, it is safe to choose an SPF of 30 to 50. Also, choose a product with PA+++ rating or higher to protect against UVA.
3. Those with sensitive skin: If you have sensitive skin or allergies, it is best to choose a mild, non-chemical sunscreen. SPF15-30 is sufficient, but it is important to reapply frequently.

How to use SPF and tips for autumn

Once you have selected an SPF suitable for autumn, the next important thing is how to use it correctly. Sunscreen is only effective if you apply it in the correct amount and frequency. Generally, it is recommended to use 1 teaspoon of sunscreen on the entire face and reapply every 2 to 3 hours. Also, in autumn, when your skin tends to be dry, it’s a good idea to choose a sunscreen that contains moisturizing ingredients.

In addition to relying on SPF, other measures are also important.

Utilizing SPF is important, but it alone does not complete the protection against UV rays. By taking the following measures, you can achieve more effective protection from UV rays.

• Wearing hats and sunglasses: Ultraviolet rays also affect the face and eyes, so physical blocking is also important.
• Protection with clothing: You can protect your skin by wearing long-sleeved clothing and clothing made from UV-protected materials.
• Indoor measures: Ultraviolet rays shine even indoors, so it is effective to put UV-cutting film on window glass or block the light with curtains.

Effects of autumn ultraviolet rays on the skin

Autumn UV rays can dry out your skin and cause age spots and freckles. In particular, the damage from UV rays you receive in the summer can affect your skin in the fall, accelerating the aging of your skin. To prevent this, not only UV protection but also aftercare is essential. It is important to use skin care items that contain moisturizing and whitening ingredients to promote skin turnover.

UV protection based on scientific evidence

A lot of research has been conducted on UV protection, and among them, research on the effects of SPF and skin damage caused by UV rays is important. For example, the American Academy of Dermatology (AAD) recommends that using sunscreen with an SPF of 30 or higher can reduce your risk of skin cancer. Furthermore, much research is underway into the mechanism by which UV rays cause age spots and wrinkles, and it has become clear that the effects of UVA are directly linked to photoaging [1].

In conclusion

Even in autumn, you should not neglect UV protection. Choosing a sunscreen with the right SPF value and using it correctly can help protect your skin from UV rays and maintain long-term skin health. Also, use physical measures and skin care to protect your skin from damage from autumn’s ultraviolet rays.

【1】American Academy of Dermatology Association: https://www.aad.org/public/everyday-care/sun-protection/sunscreen/how-to-apply-sunscreen