It is important to get outside and have some fun in the sun. However, enjoying a sunny day has its risks and drawbacks. For instance, the sun emits harmful ultraviolet radiation (UV rays). There are different types of UV rays, classified by the length and strength of their wavelengths. The most common and main types of UV rays are UVA, UVB, UVC, with UVA having the longest wavelength followed by UVB UVC.
Ultraviolet radiation reaches the body in the form of UVA and UVB rays. While UVBs only penetrate the outer layers of skin, the UVA rays are much more harmful due to their longer wavelengths. These can penetrate deep into the skin and cause permanent skin damage. This includes cellular changes and an increased risk of skin cancer, whereas UVB rays can cause 晒伤和皮肤发炎.
一种保护皮肤免受 阳光照射 and damage caused by UV rays is to wear sunscreen before you go out in the sun.
Types of Sunscreen- Which One Should You Choose?
Sunscreens contain active ingredients that create UV filters. As they work to form barriers with the help of UV filters, UV rays do not penetrate skin layers. 防晒霜有两种: 矿物(物理) 防晒霜, 化学防晒霜. Both types work to do the same job, using different mechanisms.
矿物防晒霜
矿物 sunscreen contains the active ingredients titanium dioxide and zinc oxide, 这两种都是fda批准的.
氧化锌的好处
- 块 这两个 UVA and UVB rays: Not all sunscreens provide protection from 这两个 UVA and UVB rays. Zinc oxide can reduce your risk of sunburn or wrinkles as it effectively scatters and reflects the harmful ultraviolet radiations.
- Works instantly: Zinc oxide is an active ingredient that works right away. It instantly creates a physical barrier between your skin and the sun to protect you from its harmful effects.
- Safe for the skin: Although zinc oxide is an active ingredient, 它不会对皮肤造成任何伤害. While it is suitable to be used on sensitive skin, the ingredient is also often used to treat minor skin irritations.
矿物防晒霜有时也被称为physical sunscreen, as these provide UV protection by creating a physical barrier. They sit on the surface of your skin and block UVA and UVB rays by scattering and deflecting them away. Not only do these sunscreens provide effective protection from the sun, 但它们也是即时的, 这样你就不用再等了.
While this type of sunscreen is the most common and effective, 和其他防晒霜一样, you will need to reapply frequently for the maximal benefit.
化学防晒剂
A chemical sunscreen also works to protect your skin from harmful UVA and UVB rays. However, it is quite different from a physical or mineral sunscreen. This is because 化学防晒霜 absorb into the skin and penetrate the deeper layers. 一旦防晒霜深入皮肤, it starts working by absorbing ultraviolet radiation and changing it into heat. Your skin then releases this heat energy normally.
While a chemical sunscreen promises protection from 阳光照射, it is unclear. This is because 化学防晒霜 allow UV rays to penetrate into the skin in order to change them into harmless heat. This suggests that this type of sunscreen may not be able to protect the skin from all UVA rays that penetrate deep into the skin.
最重要的是, 化学防晒霜 demand more frequent reapplication in direct sunlight as they can use up chemicals more quickly. These sunscreens can also be harmful to rosacea-prone and sensitive skin due to their heat-releasing property. 此外, heated skin can also lead to an increase in pigmentation of the skin in individuals suffering from hyper-pigmentation.
选择防晒霜
Here are a few things to keep in mind while choosing sunscreen.
检查食材
Make sure you read the ingredients at the back of your product in order to choose the safest sunscreen. Currently, the safest ingredients seem to be zinc oxide and titanium dioxide found in minerals. In 2021, the US Food and Drug Administration (FDA) released an announcement in which it deemed only 2 of 16 UV filters used in sunscreens (the minerals zinc oxide and titanium dioxide), as generally recognized as safe and effective (GRASE). The remaining 14 ingredients were determined either unsafe or are under further review.
考虑使用
How often you need to be out in the sun and use sunscreen is a big considering factor when it comes to purchasing a sunscreen. They key with sunscreen usage is regular and frequent application to obtain the most benefits.
SUMMARY
在太阳集团娱乐场登陆网站店, 我们一直努力保持领先地位, and never used Chemical ingredients for our sunscreens. We encourage everyone to choose a sunscreen that suits them, 并且在日常使用中很舒服. Preventing UV and sun damage is key to keep our skin healthy. 我们也有几个 防晒新太阳集团娱乐app 我们引以为豪的东西，包括我们的 叙利娅SPF-35!
来源
http://www.byrdie.com/natural-sunscreen-chemical-sunscreen
http://health.howstuffworks.com/skin-care/beauty/sun-care/types-of-sunscreen.htm
http://www.facetory.com/BLOGs/curations/what-are-the-different-types-of-sunscreen
