I recently returned from a camping trip with a sunburn. I should have followed my own advice on sunscreen.....Hope this helps you prevent a sunburn on that next adventure!
What is the difference between UVA and UVB rays?
UVA Rays = Aging Rays. UVB Rays = Burning Rays.
UVA Rays are more harmful than UVB rays because the penetrate deeper into the skin and damage cells and proteins to cause Aging. These are the rays that are associated with skin cancer.
UVB rays cause sunburn. These rays are most intense from 10am-4pm. Their only benefit is that they are needed to help the body produce Vitamin D3.
What does SPF mean?
SPF stands for Sun Protection Factor. It indicates how much UVB rays are blocked by the sunscreen. The higher the SPF the greater the protection against UVB rays.
What SPF should I use?
The American Academy of Dermatology recommends the use of sunscreens with an SPF of at least 15 per day.
It is very important to use a broad spectrum sunscreen that provide both UVA and UVB protection.
This is what I tell my patients:
Light Skin that burns easily should use at least an SPF of 45+
Skin that burns easily but tans nicely should start out with SPF 30+ and than decrease to SPF15 as you tan.
Skin that doesn't burn and just tans should start out using a 30+ and then decrease as you tan to a SPF15 as you tan.
Skin that is deep in pigment can use SPF 2-12.
When should I apply sunscreen
You should apply sunscreen 15-30 minutes prior to sun exposure that is going to be at least 20 minutes long.
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