Sunscreen plays an important role in protecting you from the harsh effects of the sun.

If you are interested to learn more about sunscreen and the right ways to use it for your protection, I suggest you to visit a knol by Dr. Suraj Venna.

Dr. Suraj Venna wrote a knol about sunscreen and address frequently asked questions regarding the use of sunscreen, for example: How often should I be using sunscreen? Are sunscreen truly waterproof? What should I look for when purchasing a sunscreen? and other interesting to know Qs and As.

From dozens of questions answered by Dr. Suraj, I found this question and answer useful:

Q: What should I look for when purchasing a sunscreen?

A: You want a broad spectrum sunscreen, one that covers both the UVA and UVB ranges, with an SPF of 15 for daily use, and at least 30SPF for prolonged sun exposure (30 minutes or greater). The Skin Cancer Foundation has a Seal of Recommendation embossed on the products that meet rigorous standards. For a sunscreen to attain this seal it must meet the following criteria:

• SPF (Sun Protection Factor) of 15 or more
• Testing of the sunscreen on a specified number of people
• Evaluated for possible adverse skin reactions
• If labeled water proof, it must prove this through testing

If you want to learn more about the use of sunscreen, you can visit Dr. Suraj’s very useful knol.

Image by Joe Shlabotnik.