How long does sunscreen last? How often should I reapply?

One of the important benefits of sunscreen is its ability to prevent skin aging. UV rays cause damage to collagen and elastin fibers, causing loss of elasticity and causing wrinkles. By using sunscreen, we can keep our skin looking younger, minimize the signs of premature aging, and keep our skin smooth and firm.

Why do you need to wear sunscreen?

Why do you need to wear sunscreen?

Sunscreen is an important part of daily skin care. Here are some reasons why it’s important to use sunscreen:

• Protects skin from ultraviolet (UV) rays: Sunscreen helps protect skin from the effects of ultraviolet B (UVB) and ultraviolet A (UVA) rays from sunlight.
• Sunburn Prevention: Sunburn can cause redness, swelling, and damage to the skin. Regular and correct application of sunscreen reduces the risk of sunburn and related skin problems.
• Prevents skin aging: Using sunscreen helps minimize the effects of UV rays on the skin, keeping it healthy and reducing the risk of signs of aging such as wrinkles, tanning.
• Reduces the risk of skin cancer: UV rays can damage skin cells and facilitate cancer cell growth. Protecting the skin from the effects of UV rays is an important way to reduce this risk.

How many types of sunscreen are there?

How many types of sunscreen are there?

There are many different types of sunscreens on the market, but they can be classified mainly based on the following two factors:

According to the protective composition

• Physical sunscreen: Contains ingredients such as zinc oxide and titanium dioxide, which create a barrier on the skin to reflect and absorb UV rays.
• Chemical sunscreens: Contains chemical compounds such as oxybenzone, octinoxate, avobenzone, or homosalate, which penetrate the skin and absorb UV rays before damaging the skin.

According to the sun protection index

• Sunscreen with a low sun protection factor (SPF 15-30): Provides a basic level of protection against UVB rays.
• Sunscreen with a high sun protection factor (SPF 30 or higher): Provides a higher level of protection against UVB rays.
• Broad-spectrum sunscreen: Protects from both UVB and UVA rays. SPF does not measure protection against UVA rays, so choosing a broad-spectrum sunscreen helps ensure more comprehensive protection.

How long does sunscreen last? How often should I reapply?

How long does sunscreen last? How often should I reapply?

The effectiveness of sunscreen is usually short-lived, so reapplying sunscreen is necessary to maintain its effectiveness. The effectiveness and time to reapply depends on a number of factors such as your sun protection factor (SPF), your activity, and environmental conditions. Here is an overview guide:

Initial effective time

• Sunscreens usually provide immediate protection when applied to the skin. This allows you to get out of the house and expose yourself to sunlight in an instant.
• However, for maximum effectiveness, it is necessary to wait at least 15-30 minutes for the sunscreen to fully penetrate the skin before exposure to sunlight.

Time to reapply

• You should reapply every 2 hours or after being exposed to water or sweating heavily . In addition, if you are participating in outdoor activities that involve intense sun exposure, such as swimming, exercising or playing sports, you should reapply sunscreen more often, approximately every 1 hour. every -2 hours.

Standard procedure for applying sunscreen

Standard procedure for applying sunscreen

Step 1 Choose the right sunscreen for your skin type, protection needs, and activity. Make sure the sunscreen has the right SPF rating and offers protection from UVA and UVB rays.

Step 2 Wash your face and areas that need sunscreen with a cleanser to remove dirt and excess oil. Use other skin care products before applying sunscreen (such as toner, serum, lotion) in the appropriate order.

Step 3 Take an amount of sunscreen about 1-2 times the size of a dime to ensure enough cream for the entire skin to be protected.

Step 4 Dot and spread sunscreen evenly on areas of skin that need protection, including face, neck,…

Step 5 Use your fingers or palms to gently massage and spread the sunscreen evenly on your skin . Make sure the cream is absorbed evenly and does not leave the skin unprotected.

For the best skin protection, use sunscreen daily, even when it’s not sunny or not exposed to direct sunlight. Apply sunscreen about 15-30 minutes before leaving the house to fully absorb into the skin.

Here is information on how long sunscreen works and how often it must be reapplied. lassho.edu.vn hopes the above article will help you choose how to take care of your skin and choose the right products!

Choose to buy genuine sunscreen at lassho.edu.vn:

lassho.edu.vn