How much do you know about protecting your skin? How often should you apply it? How much should you use to cover your whole body? What kind of rays does sunscreen protect against? UVA? UVB? Both? If these questions have left you scratching your head, check out this quiz from Fitsugar.

Here are some quick sunscreen facts:

• When you don't use enough sunscreen, the sunscreen you did apply is not nearly as effective.
  
• UVA Rays can pass through windows and contribute to aging of the skin. UVB rays cannot pass through windows and can cause skin cancer.
• SPF 15 blocks out 93% of harmful rays. Impressive, huh?

A new website assesses the effectiveness and safety of almost 800 sunscreens. The suncreen screening site was put together by the Environmental Working Group and gives detailed information about many sunscreen products. It also groups them by the types of harmful rays they're meant to protect against.

SPF numbers on sunscreens only cover UVB, the type of rays most responsible for burns. UVA is far less responsible for burning, but still can raise skin cancer risk. Only one sunscreen in five has effective UVA protection. There are ingredients that protect well against UVA, but sunlight can break down and make them ineffective if they are not formulated well.

Watch out for the commonly misleading claims -- all day protection, waterproof or chemical free products. You can check the website for sunscreens that are recommended and ones to be avoided.

That's Fit blogger Jonathon Morgan wrote on May 25 about five sunscreen myths. In the spirit of Skin Cancer Awareness Month, it seems appropriate to mention this thought-provoking news here on this site.

I just heard a radio commercial about a certain sunscreen, claiming the product is so good consumers need only apply the lotion one time during an eight-hour time frame. It seems, according to the following list of myths, this is not exactly true.

Myth #1: Sunscreens protect all day.
Fact: Regardless of the SPF or what the label says, sunscreens must be reapplied every two hours because active ingredients in most products break down when exposed to the sun.

Sunscreen products containing Mexoryl SX or ecamsule, an ingredient designed to block the sun's harmful UVA rays, have been sold in Canada and Europe for over ten years, but have not been available here.

The Food and Drug Administration (FDA) has recently approved the over-the-counter sale of L'Oreal Anthelios SX sunscreen product containing ecamsule to consumers in the US.

While UVB rays are known to cause sunburn, UVA rays penetrate deeper into the skin and are associated with an increased risk for basal and squamous cell cancers and melanoma skin cancer. Anthelios SX is made by the French cosmetics company L'Oreal. Mexoryl SX is owned by L'Oreal, and is only available in L'Oreal products.

Sunscreens might provide some protection from the harmful rays of the sun, and should be used when going out in the sun. Still your best bet is to shade yourself when spending any length of time in the sun and staying out of the sun during the peak hours of 10 AM to 4 PM when sun can cause the most skin damage.

The summer months are upon us which means lots of ball games, boating and fishing trips, beach vacations, and outdoor fun. That back yard swimming pool soon becomes the refuge from the heat.

Now is a great time to educate your child on the importance of lathering up with sun screen. This could keep them from getting the number one cancer in the world, skin cancer. Skin cancer is not just a cancer for the older generation. Skin cancer statistics show a rise in younger adults, teens, and children. Steps for early precautions could mean prevention.

In the majority of skin cancer cases, skin cancer develops on a part of the body most exposed to the sun. However, that is not always the case, and dermatologists suggest a regular self examination of your entire body skin surface.

To begin a self examination you will need a full-length mirror; a handheld mirror; and a private well-lit room. The full-length mirror allows you to exam the skin areas easily viewed and the handheld mirror gives you the chance to see skin areas not as easily seen, such as the back, scalp, underarms, genitalia, palms, soles, and areas between the toes and fingers. When you visit the Skin Care Physicians skin cancer self examination webpage, you will find an illustrated step-by-step guide, complete with body positions, to carry out a successful self examination.

The obvious danger signs of skin cancer are changes in the size, color, shape, or texture of birthmarks, blemishes, or moles. More specific, signs that should catch your attention are a sore that never fully heals; a translucent growth with rolled edges; brown or black streak underneath a nail; cluster of slow-growing, shiny pink or red lesions; a waxy-feeling scar; flat or slightly depressed lesion that feels hard to the touch or moles that bleed or itch. Photographs of suspicious looking skin growths and moles are also published on the skin cancer self examination webpage. To me, cancerous moles and lesions look nasty and seem easy to identify.

A final note from the experts, and another reason to perform regular self examinations -- if detected early, skin cancer is highly curable -- and the earlier skin cancer is diagnosed, the less scarring from surgical procedures when removing a cancerous growth.

For sun worshipper Shonda Schilling, being diagnosed with Stage 2 melanoma was an unbelievable shock and a life-changing wake up call to the dangers of too much sun. As a result, Shonda and her husband Curt Schilling -- former Arizona Diamondbacks pitcher -- founded the Shade Foundation in a mission to eradicate melanoma through the education of children and the community in the prevention and detection of skin cancer and the promotion of sun safety.

The Shade Foundation provides shade structures for recreational areas on school grounds, and offers an extensive online resource of educational information and programs to raise awareness for sun safety. According to the American Academy of Dermatology and Shade Foundation, skin cancer is an unrecognized epidemic. Statistically, one in five Americans will develop skin cancer, and the diagnosis of younger adults with skin cancer has increased sharply. Half of all new cancers in the United States are skin cancers.

To be sun safe when going outdoors, they recommend sunscreen, a broad-brimmed hat and sunglasses. And stay away from tanning beds -- because occasional yet intense UVA exposure from tanning beds actually poses a greater risk of melanoma skin cancer than does spending long hours in the sun. To learn more about sun safe activities for kids and young adults, programs, educational materials, and creating shade, visit the Shade Foundation.

Environment Canada meteorologists are warning people who enjoy spending time in the sun to do less so this year. As the ozone layer continues to thin, the danger for sunburn, cataracts and skin cancer continues to increase. The ozone layer is not protecting us from the sun's harmful ultraviolet radiation as much as it once did.

According to Environment Canada, the ozone layer across Canada has decreased by four to eight per cent over winter and spring, and the more sunny days there during the summer season, the more skin cancer risk to those who spend time outdoors.

Counting on sunscreen lotion to protect from the damaging rays of the bright day sun is no longer sufficient. Skin cancer experts insist, to be safe, stay out of the sun from 10 a.m. to 4 p.m. -- if you must be outside -- stay in the shade. Wear a wide-brimmed hat and quality sunglasses that offer protection from UVA and UVB radiation, and a long-sleeved shirt. Gone are the care-free days of walking out the door in shorts and a summer top, to spend the day enjoying the warmth and brightness of a summer day. Or, for sun worshippers, a day basking in the sun to achieve the golden tan.