Key Points to choose the right sun block

Sun block is very important to protect your skin and prevent the skin cancer. But how to choose the right sun block??? When you purchase it, you should consider: SPF, UVA & UVB and Waterproof & Water resistant.

1. UVA, UVB Protection

Sunlight travels in waves and includes both visible light and invisible ultraviolet (UV) radiation. Visible and UV light sit adjacent to one another on the electromagnetic spectrum.  Basically, there are two types of ultraviolet radiations that can ultimately lead damages to the skin, UVA and UVB:   

• UVA rays (320-400 nm) penetrate skin deeply, causing aging, wrinkles and potentially skin cancer.
• UVB rays (290-320 nm) are sunburn-causing solar rays; they can also contribute to skin cancer.

The American Cancer Society reports that more than 1 million non-melanoma cases of skin cancer diagnosed annually in the U.S. are sun-related. UV light can also weaken the body's immune system.
UVA light presents a subtle threat to our skin. Unlike a UVB-caused sunburn, it creates no discomfort and its impact (wrinkles and other signs of premature aging) may not become apparent for years.

2. SPF

SPF stands for Sun Protection Factor and measures the protection against UVB provided by a sunscreen. The higher the SPF number, the better protection against the sun's harmful UVB rays. The SPF number lets you know how much longer you can stay out of the sun without burning. For example, if it takes 15 minutes for a person to burn, an SPF 15 will allow them to stay out in the sun 15 times longer without burning.

3. Waterproof vs. Water Resistant

If you are looking for a sunscreen to use while in the water, choose a sunscreen that is "waterproof" or "water resistant."

"Waterproof" sunscreen should provide protection in the water for 80 minutes, while "water resistant" provides only 40 minutes of protection.

Tip & warning

• If you are worried about the sunscreen stinging your eyes while sweating during strenuous activity, choose a sports sunscreen – they dry quickly and often come in a stick format;

• Not because a product claims it protects from both UVA and UVB means it has the actives to offer protection from both. You should always read the label to know the truth.
•  Do not use a product with a higher SPF than 50. The testing required for such products have not been approved by the FDA as yet.

• Higher SPF does not mean more protection. Reapply the product if you feel the need to have more coverage.
• Once you have made your purchase, it is important to store your sunscreen at room temperature. Sunscreen is generally good for about three years or until the expiration date on the bottle. However, if you notice any changes in color or odor, the product should be thrown out.